Coix lacryma-jobi 0, 20, 40 mg·L^-1 of K₂Cr₂O₇ were added into domestic sewage, respectively. The results showed that the content of Cr in the plants was increased significantly with the prolong of Cr⁶⁺ stress and the increase of Cr⁶⁺ concentration, and the Cr content in the root was the highest, followed by leaves and stems. Cr concentrations in cell walls and vacuoles were increased significantly with Cr⁶⁺ exposure, but Cr content in organelles was lower than that of cell walls and vacuoles. Cr concentrations in cell walls, organelles and vacuoles of the roots were significantly higher than those of stems and leaves. The distributions of Cr concentration from the highest to the lowest were cell walls, vacuoles and cellorgans. Under Cr stress, most Cr was fixated on the cell walls of the roots, thereby limited further transportation of Cr to stems and leaves and reduced the toxicity of Cr to shoots. C. lacryma-jobi can absorb Cr effectively in the wastewater. Cell wall was one of the important physiological mechanisms for chromium detoxification in C. lacryma-jobi.]]> 2018/6/26 11:36:15 *, LIANG He, LI Zhengwen]]> LI Zhigang, YANG You, AN Ruichen, LI Qiong, LI Suli^*, LIANG He, LI Zhengwen 19true Dicranopteris dichotoma patches, growth characteristics, soil fertility factors and microenvironment factors in the experiment plot in Laiyoukeng of Changting County, Fujian Province, which is a typical representative of the red soil hilly region of China. The results were as follows:(1)The percentage of microtopographites increased in order ridge < upper slope < middle slope < lower slope < valley in D. dichotoma patches. The ridge occupied 9.38% of the total area; the upper slope, the middle slope, and the lower slope were almost evenly distributed(18.55%, 19.63% and 22.71%); the valley accounted for 28.43% of the total area in D. dichotoma patches.(2)There were significant differences in all D. dichotoma growth characteristics including plant height, plant density, aboveground biomass, underground biomass, and total biomass and part of soil fertility factors including organic matter, total nitrogen(TN), alkali-hydrolyzable nitrogen(AN), available kalium(AK), and pH value among the three microtopographies(ridge, slope, and valley), respectively, and they tended to decrease in order from the valleys through the slopes to the ridges, respectively, while pH value tended to increase in the same order. TP, available P, TK, and < 2 μm clay content were not significantly different among the three microtopographies, respectively. All D. dichotoma growth characteristics were significantly correlated positively with part of soil fertility factors(organic matter, TN, AN and AK), respectively, while all D. dichotoma growth characteristics were significantly correlated negatively with pH value, respectively. There was no significant correlation between all D. dichotoma growth characteristics and other soil fertility factors [TP, available phosphorus(AP), TK, and < 2 μm clay content](except for AP and plant density), respectively.(3)Surface temperature, temperature underground 5 cm, and moisture underground 5 cm showed statistically significant differences between the ridges and valleys, respectively(P < 0.05). Surface temperature and temperature underground 5 cm in the valleys were significantly lower than those of the ridges, respectively, while moisture underground 5 cm on the valleys was significantly higher than that of the ridges.(4)Microtopography plays an important role in D. dichotoma growth characteristics and soil fertility. Microtopography especially valley should be created to trigger the succession of D. dichotoma communities, so as to accelerate ecological restoration in the red soil hilly region of South China.]]> 2018/6/26 11:36:15 1, CHEN Zhiqiang^2*]]> ZENG Yue'e¹, CHEN Zhiqiang^2* 18true Suaeda salsa floating bed on nitrogen and phosphorus in marine-culture tail water. Two groups of contrast experiments were designed: adding S. salsa floating bed and without floating bed, by comparing the changes of plant height, biomass, moisture content, root length and content of nitrogen and phosphorus in different parts of plant at the beginning and the end of experiments. Removal effects of total nitrogen(TN)and total phosphorus(TP)in water were also measured to verify the removal ability of S. salsa to nitrogen and phosphorus in marine-culture tail water as well as to explore the effects of S. salsa on accumulation of nitrogen and phosphorus and their growth characteristics. The results showed that S. salsa could adapt well to the floating bed culture environment of saline-culture tail water and there was a significant increase in plant height, biomass, water content and root length. The accumulations of N and P were mainly in leaves and roots of S. salsa. N and P accumulation effects of S. salsa accounted for 16.10% and 78.15% on TN and TP removal in water. This results can provide a reference for further study of the role of S. salsa in purifying of tail water in seawater pond and the use of floating bed to repair the tail water of mariculture.]]> 2018/6/26 11:36:15 WANG Chenyi, ZHAO Xinyuan, TENG Lihua, GUO Weichao 17true Arundo donax and Ruellia brittoniana, two alkali-tolerant species. The results indicated pH of red mud reduced significantly from 11.08 to 9.70 after 35 d mixture with pine needles, and then leveled off. When the proportions of pine needles increased, pH of red mud decreased and organic matter content significantly increased from 6.13 to 17.52 g·kg^-1. When grown in pure red mud, Arundo donax and Ruellia brittoniana died after more than two months. However, they could grow well at amended red mud(mixed with about 4% pine needles). Compared with limestone soil, Arundo donax had similar biomass and relative growth rate(RGR)but significantly higher below-/above-ground biomass(B/A)in amended red mud, while Ruellia brittoniana showed significantly lower biomass and RGR but similar B/A.]]> 2018/6/26 11:36:15 *, HUANG Yuqing, XU Guangping, HE Wen, LI Yanqiong, HE Chengxin]]> LIAO Jianxiong^*, HUANG Yuqing, XU Guangping, HE Wen, LI Yanqiong, HE Chengxin 16true 3·hm^-2), MSI3(1 350 m³·hm^-2), MSI4(1 800 m³·hm^-2), MSI5(2 250 m³·hm^-2), with no irrigation and clean cultivation as control, to learn the effects of water and nitrogen and yield under micro-sprinkler irrigation. The results showed that during the growth of mung bean, the banana evaporation of different irrigation treatments decreased in different degrees, while the evaporation of the clean cultivation mode(MSI0)was found a trend of rising. With the increase of irrigation amount, the banana evaporation in banana and green manure intercropping systems gradually increased, resulting in reduced water use efficiency. The cumulative soil evaporation of MSI5 was 385.6mm, which was 12.2%, 7.6%, 4.9% higher than that of MSI2, MSI3 and MSI4 respectively. Micro-sprinkler irrigation can improve the surface soil moisture content, which the soil moisture content of MSI2, MSI3, MSI4, MSI5 under 0-30 cm soil layer was significantly higher than those of MSI0 and MSI1, while below 30 cm, soil moisture began to decrease. Micro-sprinkler irrigation under banana-mung bean intercropping could ameliorate the structure of tillage, and enhance soil fertility. Three-phase ratio(2:1:1)of 900 m³·hm^-2(MSI2)was the ideal pattern, the topsoil available nitrogen content of 1 350 m³·hm^-2(MSI3)was the highest, the highest yield of MSI4 reached 48 218 kg·hm^-2, and the optimal sugar content of MSI3 was up to 25.67%. From the above, it can be seen that appropriate irrigation is conducive to the improvement of banana soil habitat and increasing yield under banana-mung bean intercropping.]]> 2018/6/26 11:36:15 1*, HUANG Zhonghua², LUO Weigang², LI Tingting¹, MENG Yancheng¹, HUANG Taiqing¹, LIAO Ting², YU Yuefeng¹]]> HU Junming^1*, HUANG Zhonghua², LUO Weigang², LI Tingting¹, MENG Yancheng¹, HUANG Taiqing¹, LIAO Ting², YU Yuefeng¹ 15true -1 Pb polluted field as experimental materials, and used potted method in comparison with unpolluted broad bean of same generation, and measured eight physiological indexes related to antioxidant enzyme system and metabolism, which included the content of chlorophyll, protein, soluble sugar, proline(PRO), malondialdehyde(MDA), and activities of superoxide dismutase(SOD), glutathione reductase(GR)and malate dehydrogenase(MDH). The results were as follows:(1)Under long-termed Pb pollution, chlorophyll content related to photosynthesis ability of broad bean between the eighth and thirteenth generation had significant differences(P<0.05)with control group.(2)Soluble sugar content increased gradually with the duration of stress, and increased to the highest level in the tenth generation and then began to return to normal unpolluted level. Protein content increased from the thirteenth generation.(3)Long-termed Pb pollution stress also produced significant changes in the membrane of broad bean MDA and PRO, which presented the highest contents in the tenth generation; they decreased after the tenth generation and gradually tended to less change after the thirteenth generation.(4)SOD, GR and MDH in the antioxidant enzyme system also showed the decreasing tendency. GR displayed the largest change, and MDH showed the greatest difference among all experimental and control group at the earliest generations. Through analysis, it can be concluded that under the long-termed continuous heavy metal Pb pollution, the broad bean population has an increasing adaptability to Pb pollution.]]> 2018/6/26 11:36:15 *]]> WU Bohan, FU Denggao, DUAN Changqun^* 14true 4⁺-N), nitrate nitrogen(NO₃^--N)were selected in the present study. The results showed that the indicators of SS, COD, TN, TP and NO₃^--N were siginificantly reduced between 2014 and 2015 regardless of the plant community types. The average reduction rates reached 45% for SS, TP and NO₃^--N. However, NH₄⁺-N was not effectively reduced. There were some differences to reduce the pollutant among different plant communities. However, the interaction between different communities and annual reduction for SS,COD,TN,TP,NO₃^--N did not show significant differences. It was suggested that plant species selection and their spatial allocations had great significance in the bio-treatment of polluted lakes and the ecological recovery of abandoned farmland area in Dianchi Lake basin. On the whole, it can be conclude that the plant community of arbor-shrub-herb has the best effects on reducing pollutants of surface runoff in Dianchi Lake basin. Therefore, we suggest that the plant community of arbor-shrub-herb should be prioritized application in the ecological restoration and recovery of Dianchi Lake basin. This study on the plant community establishment and its effect on surface runoff pollutant reduction in abandoned farmland area of plateau lake can provide scientific information for nonpoint pollution control, ecological restoration and recovery.]]> 2018/6/26 11:36:15 1, WU Fuqin^1,2, YANG Guansong^1,2, HE Shuzhuang³, WANG Yuehua¹, SHEN Shikang^1*]]> ZHOU Xiongli¹, WU Fuqin^1,2, YANG Guansong^1,2, HE Shuzhuang³, WANG Yuehua¹, SHEN Shikang^1* 13true Abutilon theophrasti, to reveal the photosynthetic adaptability of A. theophrasti under Pb stress, and to provide potential species for Pb contaminated soil area, five Pb concentration gradients(0, 200, 500, 1 000, 1 500 mg·kg^-1)were set in the experiment. Pb accumulation, gas exchange parameters, chlorophyll fluorescence characteristics and biomass were analyzed under different concentrations of Pb stress. The results showed that net photosynthetic rate(P_n)and stomatal conductance(G_s), photochemical efficiency(F_v / F_m), electron transport rate(ETR)of were not significant(P>0.05). This indicated that when the Pb concentration was less than 1 000 mg·kg^-1, the activity of the reaction center of A. theophrasti was not affected, and the photosynthetic ability was strong. The biomass of A. theophrasti was 88.6% and 106% of the blank group under 500, 1 000 mg·kg^-1 Pb stress, it could grow normally. A. theophrasti had a adaptability under Pb stress, and had strong ability of Pb accumulating in polluted areas of Pb. In summary, when the Pb pollution is less than 1 000 mg·kg^-1, A. theophrasti has strong adaptability to Pb stress. A. theophrasti can be used as a potential species for Pb contaminated areas, according to the actual situation of Pb contaminated soil area, for the characteristics of high efficiency in the low concentration Pb pollution area.]]> 2018/6/26 11:36:15 1,2, LUO Yuhong^1,2, WANG Linquan^1,2, LIU Huigang², XU Tao², HUANG Yingping^1,2*]]> GAN Long^1,2, LUO Yuhong^1,2, WANG Linquan^1,2, LIU Huigang², XU Tao², HUANG Yingping^1,2* 12true Cinnamomum camphora trees as research objects. The differences in the spatial distribution of different heavy metal contents in barks and foliar particles were also compared. The main conclusions of this study can be summed up as follows: Heavy metal pollution in commercial and industrial areas are more serious. Heavy metal contents in the barks of C. camphora trees in different functional areas of Nanjing have obvious spatial and temporal distribution characteristics. The contents of heavy metals in the barks of different functional areas follow the order of commercial area(CA)> cultural and educational area(CEA)≈ industrial area(IA)> traffic area(TA)> scenic area(SA). Heavy metal contents in the barks in different seasons follows the order of Autumn > Winter > Spring > Summer. Contents of heavy metals in particulate matter of leaves were higher than those in barks. Contents of heavy metals in foliar particles in commercial area were the highest, and contents in scenic area are the lowest. Pearson correlation analysis showed that there was a significant correlation(P< 0.05)between Cr in the barks of C. camphora trees in industrial and cultural areas, and significant correlations between Cu and Zn, indicating that these two kinds of elements may have similar origins. Contents of Pb between industrial area and traffic area were in significant correlation(P< 0.01), mainly from traffic emissions. Plant monitoring can indicate and predict the level of heavy metal pollution in the atmosphere. It is a simple and practical monitoring tool that can reflect the pollution in the area and provide a scientific basis for the monitoring of urban ecological environment.]]> 2018/6/26 11:36:15 1,2, WANG Guoxiang², HAN Ruiming², ZHANG Yinlong^1*]]> YU Cencen^1,2, WANG Guoxiang², HAN Ruiming², ZHANG Yinlong^1* 11true Phrynium capitatum and Pennisetum purpureum as artificial wetland plant, we studied the growth characteristics of Phrynium capitatum and Pennisetum purpureum, the purification effects of COD_cr, total nitrogen(TN)and total phosphorus(TP)in domestic sewage by wavy subsurface flow constructed wetland. The results after fifteen months of continuous running showed that under a condition of hydraulic surface loading for around 0.3 m·d^-1, the average removal rate of them were 66.1% and 70.1%(COD_cr), 60.4% and 63.7%(TN), 74.1% and 75.1%(TP). Both plants grew well, the roots were well developed, the aboveground biomass of P. purpureum was 2.1 of Phrynium capitatum, and the underground biomass was quite the same. The growth of P. purpureum was slow in the winter, and the part of leaves were dry around with Phrynium capitatum, but they would not wither in winter. The results showed that they had a good purification effect on COD_cr, TN and TP without significant difference. Phrynium capitatum and Pennisetum purpureum can significantly improve the purification effect of subsurface flow constructed wetland.]]> 2018/6/26 11:36:15 1,2*, ZHANG Liwei¹, CHEN Lei¹, Deng Li¹]]> CHEN Fukun^1,2*, ZHANG Liwei¹, CHEN Lei¹, Deng Li¹ 10true Panax notoginseng is a kind of traditional and precious herbaceous officinal plant in our country. Its heavy metal pollution problem has already caused wide public concern, and the related studies have shown that a certain concentration of cadmium can produce inhibition for the its growth, cadmium stress can reduce its accumulation of saponins, the main pharmacodynamic component, and influence the quality of its medicinal materials. The health risk assessment of cadmium in it showed that the hazard quotient(HQ)was greater than one, which indicates that cadmium in it has non-carcinogenic risk to users. In order to reveal the response of different parts of P. notoginseng to cadmium toxicity, to clarify the basic characteristics of cadmium distribution in it by cadmium pollution of its different concentrations and the enrichment characteristics of its different parts, and to reveal the mechanism of cadmium stress on enrichment and transfer characteristics of its different parts. The triennial P. notoginseng was used as the experimental material in P. notoginseng garden, Jingxi City, Guangxi, under the condition of soil culture, with no cadmium treatment as the blank control and six cadmium concentration gradients(5, 10, 20, 30, 40, 50 mg·kg^-1), the characteristics of cadmium accumulation and transfer in its different parts were analyzed under the stress of different concentrations of cadmium. The results showed that cadmium accumulation in different organs(leaf, stem, scissor, fibrous root and taproot)increased significantly with the increase of cadmium concentration(P < 0.05), showing a positive correlation. The distribution characteristics of cadmium content in different parts of P. notoginseng were as follows: In the blank control group, the cumulative distribution of cadmium in each organ was fibrous root > cut root > tap root > stem > leaf; When the cadmium concentration was 5, 10, 20, 30, 40, 50 mg·kg^-1, the distribution of cadmium was cut root > taproot > fibrous root > stem > leaf; The cadmium content in the underground part was significantly higher than that in the aboveground part, with the increase of cadmium concentration, the bioenrichment coefficient of both under-ground and above-ground parts decreased gradually.]]> 2019/7/1 11:24:47 1*, CHEN Yuping¹, WEI Siqi², LIN Junliang¹, HE Xiaoshi¹, NONG Yewan¹, QI Yuan¹, QIN Lichen¹]]> LI Suxia^1*, CHEN Yuping¹, WEI Siqi², LIN Junliang¹, HE Xiaoshi¹, NONG Yewan¹, QI Yuan¹, QIN Lichen¹ 9true Viola verecumda grown in karst area as material, and analyzed the relationship between the changing characteristics of calcium oxalate cyrstals and water in its leaves, by subjecting the leaves to natural dry soil. The results showed that in the early stage of drought stress, V. verecumda maintained the intracellular water balance mainly through the release of intracellular bound water. In the later stage of drought, the leaves mainly prevented water loss by closing the stoma and converting part of the free water into bound water. In addition, the density of calcium oxalate crystals had an significant positive correlation with the bound water content(r=0.825 3, P<0.000 1), suggesting that calcium oxalate crystals act as the main matter binding water. Therefore, V. verecumda may coordinate the physiological behavior of calcium oxalate crystals and stomatal during drought tolerance.]]> 2019/7/1 11:24:47 1,3, ZHANG Ximin^1,3, MA Lin³, DUAN Shengguang³, CHEN Ting³, YI Yin^1,2,3*]]> SU Zhimeng^1,3, ZHANG Ximin^1,3, MA Lin³, DUAN Shengguang³, CHEN Ting³, YI Yin^1,2,3* 8true Leersia hexandra is a chromium hyper-accumulative plant which was firstly found in China. The endophytic bacteria of L. hexandra and their removal capacity for Cr(VI)were studied. A Cr(VI)-resistant endophytic bacterium G04 was isolated from the roots of L. hexandra by solid plate culture method using the media of beef extract peptone containing Cr(VI). Biological identification results showed the strain belonged to Enterobacter cloacae. Effects of culture conditions, such as initial pH, temperature, Cr(VI)concentration, liquid volume, inoculation amount, shaking speed and culture time, on the removal rate of Cr(VI), removal rate of total Cr and the growth of the strain were studied in detail by shaking flask culture. The results showed that the optimal conditions for the removal of Cr(VI)by E. cloacae G04 were initial pH of 5.0, culture temperature of 37 ℃, substrate concentration of 100 mg·L^-1, liquid volume of 80 mL in 250 mL conical flask, inoculum size of 15%, shaking speed of 100 r·min^-1 and culture time of 48 h. Under these conditions, the removal rate of Cr(VI)and total chromium were about 84% and 8%, respectively. The results of this study indicate that the endophytic bacteria Enterobacter cloacae G04 has better application potential for removing chromium. It may be used directly for remediation of soil and water environment contaminated of chromium, and also may be used as alternative strain for promoting plant remediation of chromium pollution. Furthermore, the result has an important refe-rence value for illuminating the mechanism of chromium hyper-accumulation of L. hexandra.]]> 2019/7/1 16:11:54 1, CHEN Haishan², YUAN Zhihao¹, QIN Shuqin^1,2, CHEN Huiying¹, LI Dianpeng², LI Haiyun^1*]]> HAN Wen¹, CHEN Haishan², YUAN Zhihao¹, QIN Shuqin^1,2, CHEN Huiying¹, LI Dianpeng², LI Haiyun^1* 7true -3, and the removal efficiency, leaf injury index and peroxidase(POD)activity were measured after 12 h of formaldehyde fumigation. The results showed that all six indoor ornamental plants could purify formaldehyde, and the purifying effect of Spathiphyllum kochii was the best at the concentration of 0.1-0.3 mg·m^-3 while Epipremnum aureum and Chlorophytum comosum had better purification and resistance at 0.5 mg·m^-3 formaldehyde. However, the tolerance of Adiantum capillus to formaldehyde was quite weak, so that it can be used as indicative plant for indoor formaldehyde pollution. The results also showed that the POD activity of the six plants was positively correlated with the removal rate of formaldehyde(P < 0.05), which suggestes that the change of POD activity is the main resistance mechanism of plants under formaldehyde stressed-environment.]]> 2019/7/1 11:24:47 1, PENG Qi'an^2*]]> HE Hui¹, PENG Qi'an^2* 6true Arundo donax has a strong tolerance of a variety of heavy metals, and is an ideal choice for phytoremediation, however, there is limited information on the physiological responses of A. donax to Cd and Tl stress, regarding its highly desirable for phytoremediation of metal contaminated sites. Therefore, a potted experiment was carried out to investigate the effects of different concentrations of Cd(50, 100 and 200 mg·kg^-1)and Tl(4, 10 and 20 mg·kg^-1)stress on height, number of nodes and chlorophyll content of A. donax, photosynthetic characteristics and the accumulation of Cd and Tl in A. donax after four months of cultivation, all these parameters were determined for each treatment. The results showed that the height, number of nodes and chlorophyll content of A. donax were not significantly affected by exposure to Tl(form 4 to 20 mg·kg^-1)or Cd(form 50 to 200 mg·kg^-1)(P > 0.05). The concentrations of Tl and Cd in A. donax increased with the additive concentration of Tl and Cd, Tl accumulated in the order of root > stem > leaf; while Cd accumulated in order of stem > leaf > root under 50 mg·kg^-1 Cd concentration treatments and in order of root > stem > leaf under 100 and 200 mg·kg^-1 Cd concentration treatments, Tl and Cd are mainly distributed in the root, A. donax has certain enrichment ability to Tl and Cd. Although all Tl treatments significantly decreased intercellular CO₂ concentration(C_i)of A. donax, 10 mg·kg^-1 Tl treatment significantly increased the net photosynthetic rate(P_n), stomatal conductance(G_s)and transpiration rate(T_r). Meanwhile, all Cd treatments significantly decreased the intercellular CO₂ concentration and the water use efficiency(WUE), but 50 mg·kg^-1 treatment significantly increased the net photosynthetic rate, stomatal conductance and transpiration rate. These results suggest a strong tolerance of A. donax to increased Cd or Tl pollution and it can be used as a reference for the treatment and remediation of Cd or Tl contaminated soil.]]> 2019/7/1 11:24:47 1,2, PU Gaozhong², HUANG Yuqing^1,3*, MO Ling²]]> CHEN Xiaxia^1,2, PU Gaozhong², HUANG Yuqing^1,3*, MO Ling² 5true 2+, Zn²⁺ and Cd²⁺ single stress were used as controls to study the effects of different concentrations of Cu²⁺, Zn²⁺ and Cd²⁺ on physiological and biochemical indexes of Jatropha curcas seedlings. The results showed that the contents of protein(Pro)and malondialdehyde(MDA)in leaves of J. curcas seedlings increased gradually with the increase of Cu²⁺, Zn²⁺ and Cd²⁺ concentrations, and the chlorophyll content of leaves increased with the increase of Zn²⁺ stress concentration. The post-reduction trend was the lowest at the medium concentration(100 mg·L^-1)Zn²⁺ stress, and the chlorophyll content increased first and then decreased with the increase of Cu²⁺ stress concentration. The highest content was obtained when Cu²⁺ concentration was 200 mg·L^-1, reaching 1 200 mg· g^-1; Cd²⁺ stress had no significant effects on chlorophyll content and root activity. The root activity was the strongest when Zn²⁺ concentration was 100 mg·L^-1, and it decreased with the increase of Cu²⁺ concentration. Low concentrations of Cu²⁺, Zn²⁺ and Cd²⁺ promoted both pero-xidase activity and soluble sugar content. The contents of soluble protein, chlorophyll and malondialdehyde were not significantly affected by Cu²⁺, Zn²⁺ and Cd²⁺ stresses. The soluble sugar content and root activity increased first and then decreased with the increase of concentration during complex stress. The results showed that J. curcas had certain resis-tance to stress of the heavy metals. Excessive concentration of stress could affect some physiological and biochemical indexes of J. curcas seedlings, but J. curcas could reduce damage through its own defense system. In addition, heavy metal complex stress could alleviate the toxic effects of single stress on J. curcas seedlings to some extent.]]> 2019/7/1 11:24:47 1,2, TANG Jianmin^1*, GAO Limei¹, ZOU Rong¹, SHI Yancai¹, FU Rong³, ZENG Xiaobiao⁴]]> ZHU Chenghao^1,2, TANG Jianmin^1*, GAO Limei¹, ZOU Rong¹, SHI Yancai¹, FU Rong³, ZENG Xiaobiao⁴ 4true -1] were set up by pot experiment, and the plant height, plant fresh weight, the content of chlorophyll and MDA, the activities of SOD, POD and CAT of leaves, the content of soil total nitrogen, pH and the activity of invertas and catalase were measured respectively. The results were as follows: Sulfur application had certain influence on the agronomic characters, physiological and biochemical indexes of spring rape seedlings and soil enzyme activity. In a range of sulfur application(35-105 mg·kg^-1)the plant fresh weight was significantly promoted, carotenoid content was the highest when sulfure fertilization was 70-105 mg·kg^-1; In a range of sulfur application(75-105 mg·kg^-1), the activities of POD and CAT in leaves were significantly increased, but the content of MDA in leaves was significantly decreased; According to correlation analysis, an extremely negative correlation was observed with MDA content and POD activity(r=-0.92, P<0.01), and a significant negative correlation was observed with MDA content and CAT activity(r=-0.72, P<0.05), indicating that MDA content is affected by the POD and CAT activities; The activities of invertase and urease in soil were inhibited with sulfur application higher than 105 mg·kg^-1, the activity of catalase in soil was inhibited with sulfur application higher than 140 mg·kg^-1; with the increase of sulfur fertilizer, the activity of SOD in leaves and soil pH showed decreasing trends; according to correlation analysis, an extremely positive correlation was observed between the content of total nitrogen and the activity of urease(r=1, P<0.01), indicating that soil total nitrogen content is affected by the soil urease activity. Therefore, physiological and biochemical indexes of spring rape seedlings and soil enzyme activity were promoted with low sulfur application(35-105 mg·kg^-1), while these indexes were inhibited with high sulfur application(>105 mg·kg^-1). This study can provide some theory reference for sulfur fertilization of spring rape.]]> 2019/7/1 11:24:47 1, HAN Yan², QIAO Feng³, SUN Xiaofeng², YAN Huanhuan¹, GENG Guigong^2*]]> QIN Mei¹, HAN Yan², QIAO Feng³, SUN Xiaofeng², YAN Huanhuan¹, GENG Guigong^2* 3true Cynodon dactylon and five kinds of mixture planting of shrub and herbage on typical slope of Bitong Expressway. The results were as follows:(1)Plant community succession after ten years, a total of 52 kinds of plants appeared in the survey sample plots, belonging to 17 families and 49 genera; and a total of 26 genra and 29 species of Compositae, Leguminosae, Gramineae accounted for 55.77% of the total, which showed that these three families played important roles in the process of vegetation succession in the restoration of vegetation.(2)Among the restoration methods, the proportion of perennial plants was higher than that of annual herbs.(3)In the mixture planting of shrub and herbage treatment, the Patrick index, Shannon-Wiener index, Simpson index and Margalef index of reforestation communities tended to increase first and then decreased with density, and reached the peak when the seeding rate of herbage was 500 plants·m^-2.(4)The growth of mixture planting of shrub and herbage was superior than that of monoculture of herbage and natural recovery.(5)Seeding density had no serious effects on the aboveground biomass and species diversity index of community. Considering the cost and benefits of side slope protection, the initial seeding density of 500 - 600 plants·m^-2 can build a stable plant community on highway slope with good protective effects. It can be applied to slope ecological restoration projects in similar area.]]> 2019/7/1 11:24:47 1, CHENG Ziqiao², PENG Ahui³, CHEN Dongqin³, DONG Shikui⁴, MA Chuang⁵, ZHANG Xiangfeng^4*, CHEN Pan¹]]> CHEN Shengyi¹, CHENG Ziqiao², PENG Ahui³, CHEN Dongqin³, DONG Shikui⁴, MA Chuang⁵, ZHANG Xiangfeng^4*, CHEN Pan¹ 2true P<0.05)were selected as indicators for specific vertical segments. With the increase in the height sampled, the proportion of species with fan and weft life-forms decreased, the proportion of pendant life-forms increased first and then decreased, while the proportion of smooth mat and rough mat life-forms increased. The relative humidity, vapor pressure, diameter at breast height(DBH)and bark roughness had significant influences on the distribution preferences of epiphyte life forms. In conclusion, epiphytic bryophytes show different life-form compositions and morphological structures in response to changes in the micro-environment along the vertical gradient of hosts, while bryophytes assembled in the same micro-habitat usually have similar adaptation mechanisms. The epiphytic species with obvious preferences for specific microhabitats can be used as indicators during the monitoring and management of habitat changes in the forest canopy.]]> 2019/7/1 11:24:47 1,2, SONG Liang^3*, GUO Xinlei^2,4, Corlett Richard T.¹, WU Yi^2,3, MA Zhanxia^2,3, CHEN Quan^2,3]]> SHEN Ting^1,2, SONG Liang^3*, GUO Xinlei^2,4, Corlett Richard T.¹, WU Yi^2,3, MA Zhanxia^2,3, CHEN Quan^2,3 1true