Excentrodendron hsienmu is a dominant as well as a character species of karst seasonal rain forest. Studying on growth process of E. hsienmu population may provide key insights for successional dynamics and status of the karst seasonal rain forest. Population growth dynamics of E. hsienmu was simulated by using the logistic model and 4 modified models according to the data from a 15 hm² plot of the karst seasonal rain forest at Nonggang,south China. To determine fitting goodness of the models,residual sum of squares,correlative coefficient and Akaike Information Criterion were compared. The results showed that the fitting goodness of Li Xin-Yun model and Liu Jin-Fu modified model were the relatively better among the five models. However,the logistic model and the S-shaped growth process model were the optimal models as comparing the AIC value. Applying the logistic model,we were able to evaluate the population expansion process of E. hsienmu. The increasing rate of E. hsienmu population reached the highest peak at about 50 a,while it levelled off after 150 a. Growth of E. hsienmu population was currently close to saturation period,and enhanced protection actions were consequently needed to maintain steady development of its community.]]> 2016/1/20 14:07:29 1,2, NONG Chong-Gang³, WANG Bin^1,2, LIU Sheng-Yuan³, DING Tao^1,2, HE Lan-Jun, LI Xian-Kun^1,2*, HUANG Fu-Zhao^1,2]]> XIANG Wu-Sheng^1,2, NONG Chong-Gang³, WANG Bin^1,2, LIU Sheng-Yuan³, DING Tao^1,2, HE Lan-Jun, LI Xian-Kun^1,2*, HUANG Fu-Zhao^1,2 19true Woonyoungia septentrionalis(Magnolianceae)is an endangered plant species endemic to China. The size structure,static life table and survival curve of W.septentrionalis population were analyzed,based on the field investigation data of the representative population in Mulun National Nature Reserve of Guangxi. The ratio of male to female individuals was 1.06︰1. The size structure was a atypical pyramid-like form,suggesting that the population was stable. The survival curve could be described by Deevey-Ⅲ. The population had two distinct peaks of mortality in age Ⅰ(q_x=0.23)and Ⅲ(q_x=0.35),but the adult age class was stable.]]> 2016/1/20 14:07:29 1, LIN Yan-Fang¹, QIN Wen-Geng², WEI Guo-Fu², LIU Yan-Hua³, TANG Shao-Qing^1*]]> ZHANG Qi-Wei¹, LIN Yan-Fang¹, QIN Wen-Geng², WEI Guo-Fu², LIU Yan-Hua³, TANG Shao-Qing^1* 18true Cyclobalanopsis glauca—Pteroceltis tatarinowii community in northern Guangxi were investigated. The results showed that the LL/LT and LT of evergreen species were significantly higher than that of the deciduous trees,SLA of evergreen species was significantly lower than that of the deciduous trees. And LL/LW was significantly different between the arbors and shrubs,while SLA and LT were not significantly different. While,the coefficient of correlation between LT and SLA was larger than that of between LL/LW and SLA,and LT had larger impact on SLA than LL/LW. Furthermore,LT significantly affected SLA in this study. Previous researches showed that the index of SLA was the indicator measuring the ability of capturing the sun's energy for leaves. The thicker leaves were,the larger impacted on ability of obtaining sunlight. Therefore,it would lead to reduce the efficiency of photosynthesis.]]> 2016/1/20 14:07:29 PAN Fu-Jing, SUN Ying-Jie, ZHANG De-Nan, ZENG Dan-Juan, XU Guang-Ping, HUANG Yu-Qing 17true Kmeria septentrionalis community sampled from 14 populations in Mulun National Nature Reserve,Guangxi. The results were as follows:(1)K. septentrionalis was dominant species because this species had the largest niche breadths and obvious advantage of environment resource utilization;(2)Niche overlap index was depent upon species's biological characteristics and requested of environmental resouces because niche overlap was lower among high value niche populations or were higher among low value niche populations;(3)Some important environment factors such as slope-exposure,the naking of bed rock,and grade of slope were the key factors that influenced the distribution status of K. septentrionalis.]]> 2016/1/20 14:07:29 1, QIN Wen-Geng^2*, LUO Liu-Juan², TAN Wei-Ning², QIN Guo-Le³]]> JIN Jun-Yan¹, QIN Wen-Geng^2*, LUO Liu-Juan², TAN Wei-Ning², QIN Guo-Le³ 16true Cyclobalanopsis glauca,the direct seeding,controlling the temperature and soil moisture content in the growth cabinet were used. The results were as follows:seeds germination rates of C. glauca were very low with(12&#177;12.29)% at the temperature 10℃/15℃in the 12-hour lighting,and their maximal germination rates was(81&#177;13.7)% at the temperature of 30℃/35℃. Seeds germination rates were(79&#177;15.9)% under soil moisture content about 30%-40%,and(56.67&#177;19.36)% at soil moisture content about 90%-100%. There were rapid germination and delayed germination countermeasures of seed germination for wild C. glauca. It was shown that temperature affected the seedling height,blade length and blade width of C. glauca seedlings significantly. On the contrary,effects on the ground diameter and leaf number of seedlings were insignificant. The different gradient of soil moisture content also affected the seedling height,ground diameter,blade length and blade width insignificant at a constant temperature.]]> 2016/1/20 14:07:29 1,2, LUO Ai-Ying1,2, XU Guang-Ping1, GU Da-Xing1, HUANG Yu-Qing1, HE Cheng-Xin1*]]> ZHANG De-Nan1,2, LUO Ai-Ying1,2, XU Guang-Ping1, GU Da-Xing1, HUANG Yu-Qing1, HE Cheng-Xin1* 15true Jatropha Curcas L. and Vernicia Fordii H. which grew well in each sampling site were studied by analyzing photosynthesis characteristics,chlorophyll fluorescence features and gross calorific value,meanwhile,physical and chemical properties of soils were determined. The results showed that the content sequence of soil available phosphorus was Xumei<Shaba<Xichao<Kongsuo<Liwai,and that of soil bicarbonate was Xumei>Xichao>Liwai>Kongsuo>Shaba. With pH>8,the higher the soil available phosphorus content or the lower the soil bicarbonate content was,the higher the photosynthetic capacity of J. curcas and V. fordii were. At same sampling site,the photosynthetic capacity and stress resistence ability of J. curcas were better than V. fordii. The gross calorific value of both J. curcas and V. fordii increase along with the soil available phosphorus content increased,while decrease with the soil bicarbonate content increased. Although the stress resistence ability of V. fordii was a little lower than that of J. curcas,it could accumulate more energy. Therefore,planting and developing J. curcas and V. fordii could be selected according to the physical and chemical properties of soils.]]> 2016/1/20 14:07:29 1, WU Yan-You^1,2*, XING De-Ke¹]]> PANG Jing¹, WU Yan-You^1,2*, XING De-Ke¹ 14true Cyclobalanopsis glauca seedlings were inoculated with Glomus mosseae and Glomus intraradices respectively,and the growth,biomass and photosynthetic parameters were measured,4 months after the inoculation. The results showed that height,ground diameter,leaf area and biomass of the C. glauca seedlings were increased significantly by the inoculation,and the survival ratio and photosynthesis were also improved by the AMF. Biomass in the seedlings treated by G. mosseae and G. intraradices were 2.1 and 1.9 times as much as those in CK,respectively. Compared with un-inoculated treatments,water use efficiency of seedlings in G. mosseae and G. intraradices treatment were increased by 33.6% and 8.8% respectively. The promotion effect of height,base diameter and biomass of G. mosseae treatments were better than those of G. intraradices treatments,while the effect of leaf area,root length and root-shoot ratio of the seedlings in G. intraradices treatments were larger than those in G. mosseae treatments. Overall,it was indicated that the inoculation of arbuscular mycorrhizal fungi,especially G. mosseae could promote the growth and biomass of C. glauca seedlings,suggesting that AMF had the potential application value in the restoration of vegetation in rocky desertification.]]> 2016/1/20 14:07:29 1,2, ZHANG Jin-Chi^1*, HUANG Yu-Qing², YANG Hui³]]> ZHANG Zhong-Feng^1,2, ZHANG Jin-Chi^1*, HUANG Yu-Qing², YANG Hui³ 13true Imperata cylindrica in Maolan Karst Forest Natural Reserve of Libo County,Guizhou Province,and inoculation effects of the dominant AMF species on Medicago sativa. The results indicated that the infection rating of Imperata cylindrica by AMF was 91.3%. Thirty-five species were isolated from I. cylindrica rhizosphere soil samples belonging to two genera,including 18 species of Glomus and 17 species of Acaulospora. Glomus melanosporum,G. fasciculatum,Acaulospora capcicula were the dominant species. In addition,the growth and superoxide dismutase(SOD),peroxidase(POD),catalase(CAT)activities of the Medicago sativa inoculated with dominant species were improved compared to the control without inoculation.]]> 2016/1/20 14:07:29 *]]> ZHANG Chuan-Bo, TAN Jin-Yu, LUO Chong, SUN Yun-Zi, ZHANG Chao, YI Yin^* 12true P<0.05).There was an increasing trend for soil microbial biomass as a whole,secondary forest and bushwood increased more than waste grassland and waste land obviously. Except for waste grassland,soil basic respiration intensity of other land-use types increased significantly and showed the same trend. The rate order of soil nutrient contents metabolic quotient was B>C>SF>WG>WL similarly. Different environmental factors,such as the input of the above-ground and underground resources in different land-use types,which resulted in the difference of quantity of soil microbial biomass. To promote the healthy development of the soil ecosystem in karst mountain areas of southwest Guangxi,more vegetation ecological restoration projects should be implemented from the perspective of soil biology,and more human disturbance activity should be avoided at the same time.]]> 2016/1/20 14:07:29 *]]> XU Guang-Ping, HE Cheng-Xin, ZHANG De-Nan, ZHAO Zhi-Guo, LU Shu-Hua, YAO Yue-Feng, HUANG Yu-Qing^* 11true Osmanthus fragrans and Cyclobalanopsis glauca under karst and non-karst terrains were studied by using field litter bag technique. The results showed that after one year,the litter weight loss rates of O. fragrans were higher than that of C. glauca, and the litter weight loss rates of samples form karst were higher than non-karst. Elements concentration in litter remainder varied in the course of decompositon,which C content tended to be increased initially,then decreased and finally increased,while N content fluctuated in the first half year but increased thereafter,and P content showed fluctuating increased. Litter loss rate(weight)was significantly positive correlated with N and P contents,and were significantly negative correlated with C:N,C:P and N:P ratio,indicating litter decomposition rates relied on litter N,P composition and C:N,C:P and N:P ratio. Sample from O.fragrans litter contained higher N,P than that from C.glauca and presented a higher decomposition rate.]]> 2016/1/20 14:07:29 1,2, XU Guang-Ping¹, ZENG Dan-Juan¹, ZHANG De-Nan^1,2, MO Ling¹, HUANG Yu-Qing^1*]]> WANG Jing^1,2, XU Guang-Ping¹, ZENG Dan-Juan¹, ZHANG De-Nan^1,2, MO Ling¹, HUANG Yu-Qing^1* 10true 2016/1/20 14:07:29 1,2, WU Wang-Hui³, JIANG Ri-Hong^1,2, LIU Sheng-Yuan⁴, LIU Yan^1,2, LI Xian-Kun^1,2*]]> HUANG Yu-Song^1,2, WU Wang-Hui³, JIANG Ri-Hong^1,2, LIU Sheng-Yuan⁴, LIU Yan^1,2, LI Xian-Kun^1,2* 9true 2 and 371.11 km²,but shrub and grassland decreased 230.69 km² and 174.70 km². Forest area was relatively stable. The national key protected plants of this region were being threatened by habitats loss and degradation,and the authors presented the countermeasure and suggestion for the future protection of the national key protected plants. This study would provide evidences for biodiversity research,preserve gap analysis,vegetation spatial and temporal change research and dynamic monitoring works.]]> 2016/1/20 14:07:29 1, YU Sheng-Xiang^2*, WANG Chang-Zuo¹, WANG Qiao¹]]> LIU Hui-Ming¹, YU Sheng-Xiang^2*, WANG Chang-Zuo¹, WANG Qiao¹ 8true Croton euryphyllus and C. lachynocarpus were extracted by steam distillation and analyzed by GC-MS. Through peak area normalization method,39 components were identified from leaves of C. euryphyllus and the main compounds were α-terpineol(17.57%),eucalyptol(11.13%),erpinyl acetate(9.07%),and α-sesquiphellandrene(8.52%)et al. Meanwhile,55 compounds,constituting ca.97.8% of the volatile oil,were inentified from leaves of C. lachynocarpus and trans-nerolidol(9.46%),α-terpineol(7.51%),eucalyptol(6.43%)and erpinyl acetate(6.72%)were found to be major compounds. In two plants,the structure types of main volatile components were terpene alcohols and sesquiterpenes,and many compounds showed bioactivities. This research would provide theoretical basis for the development and utilization of C. euryphyllus and C. lachynocarpus.]]> 2016/1/20 14:07:29 1, JIANG Li-Hua², LÜ Shi-Hong¹, LIU Jin-Lei¹, JIANG Xiao-Hua¹, PAN Zheng-Hong^1*]]> NING De-Sheng¹, JIANG Li-Hua², LÜ Shi-Hong¹, LIU Jin-Lei¹, JIANG Xiao-Hua¹, PAN Zheng-Hong^1* 7true Quercus subg. Cyclobalanopsis and Q. utilis were investigated using high resolution scanning electron microscopy(SEM). The results showed that the pollens were 3-colporoidate in subgenus Cyclboalanopsis and Q. utilis. The pollen sizes ranged from(15-28.0)μm×(15.0-25.6)μm,which was smaller than the deciduous oaks,but similar to evergreen oaks from sect. Cerris (Group Ilex). The pollen extine sculpture could be classified into three types:(1)rodlike,(2)rodlike verticle and(3)rodlike masked. These three types randomly distributed in the sections of subgenus Cyclobalanopsis. The rodlike tectum was the simplest in Fagaceae and shared by sect. Cerris and subgenus Cyclobalanopsis,which indicated its primitive stage of Quercus s.l. sect. Cerris and subgenus Cyclobalanopsis,which had closer relationship rather than sections Quercus,Lobatae,and Protobalanus,were possibly the basal clade of Quercus s.l. However,due to limited variations across the taxon of oaks,the pollen morphology would provide little informationon for the systematics at low taxonomical level.]]> 2016/1/20 14:07:29 1,2, SONG Yi-Gang¹, LI Quan-Jian¹, LI Qian-Sheng^3*]]> DENG Min^1,2, SONG Yi-Gang¹, LI Quan-Jian¹, LI Qian-Sheng^3* 6true Chrysantha,sect. Chrysantha,Camellia(Theaceae). The results showed that all species had similar morphology structure in upper epidermis of leaf,and stomata were distributed only in lower epidermis. There was remarkable difference in the shape of anticlinal wall and stomata in some species. There was also significant variation in the stomata density of leaf epidermis of Camellia species distributing in different geomorphologic areas. Species disturbing in limestone had higher stomata density in leaf epidermis than species in non-limestone habitat.]]> 2016/1/20 14:07:29 1,2, TANG Shao-Qing^1,2, LIANG Shi-Chu^1,2*]]> LI Feng-Ying^1,2, TANG Shao-Qing^1,2, LIANG Shi-Chu^1,2* 5true Hypodematium glanduloso-pilosum were artificially cultured in Knop's liquid and solid culture media. Its spore germination and gametophyte development were observed by optical microscope. The results showed that mature spores were dark brown,opaque,elliptical in polar view and bean-shaped in equatorial view,single fracture and peripheral wall with dense corrugated folds. The type of spore germination was Vittaria-type while that of gametophyte development was Aspidium-type. The spores germinated about 7 days after sowing. The prothallial plates formed about 30 days after sowing. The young prothallium developed about 30 days after sowing,and they were not symmetry,but the mature prothallium was symmetrical cordate. Papillary trichomes spread on upper and lower surfaces and along the margin of the prothallium. The antheridia was visible 75 days after sowing,pellet shape,consisting of 3 cells. About 90 days after sowing,archegonia was available. The neck of mature archegonium was composed of 4-5 rows of cells and 3-5 layers of cells high. Sporophytes were present within one month after fertilization. The paper preliminary discussed its taxonomic significance.]]> 2016/1/20 14:07:29 1, MA Xiao-Tong³, WANG Ren-Xiang^1,2*, LI Li-Shi¹]]> CHEN Yan-An¹, MA Xiao-Tong³, WANG Ren-Xiang^1,2*, LI Li-Shi¹ 4true Xanthocyparis Farjon & Hiep,a newly recorded genus of Cupressaceae from a limestone area of northern Guangxi,China is reported. Detailed morphological description and photographs of Xanthocyparis vietnamensis Farjon & Hiep were provided. According to the original record,X. vietnamensis only distributed in limestone area of northern Vietnam,but now,it was also discovered in Mulun National Nature Reserve of Guangxi,China.]]> 2016/1/20 14:07:29 1, PENG Ri-Cheng^1,2, ZHONG Kuo-Fang³, YU Zhi-Jia³, TAN Wei-Ning⁴, XU Wei-Bin^1*]]> MENG Tao¹, PENG Ri-Cheng^1,2, ZHONG Kuo-Fang³, YU Zhi-Jia³, TAN Wei-Ning⁴, XU Wei-Bin^1* 3true Cheirostylis serpens Aver.,a newly recorded species of Cheirostylis from China is reported. This species is epiphytic dwarf plant with miniature tiny rootless creeping stem and short ascending leafless inflorescence,stem creeping and the leaves without petiole,the lip is white,distinctly separated into hypochile and epichile by the constriction of very fleshy swollen margins. That is so easy to distinguish with other species.]]> 2016/1/20 14:07:29 1,3, HUANG Yun-Feng ², PENG Ri-Cheng ^1,4, HUANG Yu-Song ¹, LIU Yan ^{1 *}]]> YANG Jin-Cai ^1,3, HUANG Yun-Feng ², PENG Ri-Cheng ^1,4, HUANG Yu-Song ¹, LIU Yan ^{1 *} 2true Hemiboea,H. rubribracteata two species of Primulina,P. wentsaii and P. laxiflora,and one species of Lysionotus L. aeschynanthoides,are reported for the first time from Vietnam. The citation of specimens and their distribution is given in the present paper.]]> 2016/1/20 14:07:29 1, LIU Sheng-Yuan², WEI Yi-Gang ³, WEN Fang^3*]]> DO Van Truong¹, LIU Sheng-Yuan², WEI Yi-Gang ³, WEN Fang^3* 1true