Zanthoxylum planispimum var. dintanensis, and to realize the stabilization of forest stand and sustainable management, we took aging degraded plants with typical symbol of yellow blooms and normally grown plants as the research objects and adopted soil agrochemistry and environmental mineralogy methods to analyze mineral element content in root-zone soil of different plants, to evaluate integrated soil quality and to reveal the mineral element mechanism of aging and degradation of Zanthoxylum planispimum var. dintanensis. The results were as follows:(1)C, P, K, S, Se, Sr, Mo and oxide in root-zone soil of normally grown plants were generally higher than the content in aging degraded plants, while total nitrogen, rapidly available phosphorus, available nitrogen, Cu, Pb, Zn and Cr had no significant difference, and other elements had no obvious change rule. It indicates that mine-ral elements are one of the causes of the aging and degradation of Zanthoxylum planispimum var. dintanensis. Available contents of elements also had an impact on plant growth, which indicates that we should improve availability of nutrients when managing the Zanthoxylum planispimum var. dintanensis. From the perspective of plant nutrition demand, all major, medium and micro elements had a dominant effect on soil quality. In the management of soil fertility, we should not only focus on a large number of elements.(2)Root-zone soil quality indexes manifested that the highest plant was No. 3 normally grown plant and the lowest plant was No. 1 aging degraded plant, suggesting that soil quality influences the aging and degradation of Zanthoxylum planispimum var. dintanensis. But the soil quality is not the only cause of aging degradation of Zanthoxylum planispimum var. dintanensis, and more comparative studies of soil microbes and plant hormones should be conducted.(3)When managing the Zanthoxylum planispimum var. dintanensis in forest stand, we should cultivate good soil structure, make sure the comprehensiveness and proportionality of soil nutrient, and pay attention to deficit effect caused by low mineral elements, and it is necessary to make sure the appropriate nutrient concentration and ratio to increase the absorption capacity of the plant.]]> 2019/2/20 18:17:01 1*, YANG Danli², QIN Shiyi², WANG Lu²]]> YU Yanghua^1*, YANG Danli², QIN Shiyi², WANG Lu² 7true Phyllostachys glauca forest and plant absorption traits in a limestone mountain, and distinguish the relationships between them and the community, four plant species including one constructive species Ph. glauca, three auxiliary species Elaeagnus pungens, Camellia oleifera and Ilex cornuta were sampled in limestone mountain in Ruichang City of Jiangxi Province, China. Nine mineral elements were determined for all plant samples. After analyzing the element distribution differences and absorption traits of different species and organs, the results were as follows:(1)In Phyllostachys glauca, macro elements nutrient enriched in leaves, then roots, and finally the stems; whereas the order of micro elements was root, leaf and stem. The contents of N [(18.82 ± 1.16)g·kg^-1 ], P [(1.17 ± 0.19)g·kg^-1] and Fe [(1.01 ± 0.09)g·kg^-1] were the highest in leaf; and the pattern of uptake traits were consistent with elements distribution pattern.(2)The element distribution pattern in auxiliary species and uptake traits shared same order, leaf >stem >root. The order of microelements contents in organs were different among three auxiliary species. The Mn content of Camellia oleifera leaf was the highest in the three species, while Ca, Mg and Zn were massively accumulated in the stems of Ilex cornuta.(3)Element content and distribution pattern of upper layer plants Phyllostachys glauca and Elaeagnus pungens, which received more light, were similar, and it was different from that of the sublayer plant Camellia oleifera and Ilex cornuta. It can be seen that the differences in the distribution and absorption characteristics of the dominant species and auxiliary species in limestone mountain are closely related to the community light conditions.]]> 2019/2/20 18:17:02 1,2, FENG Huoju³, FAN Yan¹, WANG Longfeng¹, SHI Jianmin^1,2*]]> WANG Guangru^1,2, FENG Huoju³, FAN Yan¹, WANG Longfeng¹, SHI Jianmin^1,2* 6true AIC and BIC criterions with R², simultaneously, the accuracy of the estimation models of above-ground biomass were assessed using the correction coefficient, including standard error of estimated value(SEE), mean systematic error(MSE)and total relative error(TRE), and the distribution pattern of above-ground biomass of Loropetalum chinense and community in different restoration stages of L. chinense communities were analyzed with the established biomass model. The results were as follows:(1)Five models were used for regression analysis, above-ground biomass and trunk biomass had the best estimate effect, comparing with a lower estimate effect in leaf biomass and branch biomass. We chose Model Ⅳ to establish the optimum model for above-ground biomass of shrub to tree stage, Model Ⅳ was W= a+b(D²H). And we chose Model Ⅲ to establish the optimum model for above-ground biomass of shrub stage and smal tree stage, Model Ⅲ was W= a&#215;D^b&#215;H^c.(2)Based the established optimum model, we estimated that biomass above-ground on the vegetation of L. chinense communities. Among different restoration stages, the leaf biomass and branch biomass order of size was shrub to tree stage > small tree stage > shrub stage, while the above-ground biomass and trunk biomass order of size was small tree stage > shrub to tree stage > shrub stage.(3)L. chinense as dominant species in L. chinense communities, the order of its above-ground biomass size was shrub to tree stage > small tree stage > shrub stage, and the above-ground biomass of L. chinense contributed to the above-ground biomass of different restoration stages showed a decreasing trend across the succession. This illustrates the energy base and nutrient source of ecosystem operation is progressing toward with the community moves to a higher stage of succession, and the status of edificator of L. chinense in different restoration stages of L. chinense communities may be replaced step by step, and backseat to the sub-tree layer.]]> 2019/2/20 18:17:02 1, MA Jiangming^{1, 2, 3*}, SU Jing¹, QIN Jiashuang¹, MO Yanhua¹]]> ZHANG Yajun¹, MA Jiangming^{1, 2, 3*}, SU Jing¹, QIN Jiashuang¹, MO Yanhua¹ 5true Loropetalum chinense(shrub stage, shrub to tree stage and small tree stage)communities were selected as the research objects in karst hills of Guilin. The results showed that after one year of decomposition, the dry mass remaining in three different restoration stages of L. chinense communities from low to high was shrub stage(59.58%), shrub to tree stage(61.79%), small tree stage(62.02%). The decomposition rate of litter at different restoration stages of L. chinense communities decreased with the succession of vegetation restoration. The litter layer enzyme activity of polyphenol oxidase, urease and sucrase at three different restoration stages were the lowest in December and the enzyme activity of polyphenol oxidase was the highest in March. The enzyme activity of urease and sucrase were the highest in June. The change trends of cellulase activities at three different restoration stages were consistent, with the highest enzyme activity in June. The cellulase activity was the lowest at shrub stage in March, and the cellulase activity was the lowest at shrub stage and small tree stage in September. The enzyme activity order of litter layer at three different restoration stages of L. chinense communities in different periods was sucrase > urease > cellulase > polyphenol oxidase. The litter enzyme activities at different restoration stages of L. chinense communities played different roles in litter decomposition rate. Litter decomposition rate was positively related to the litter layer enzyme activity of sucrase (P < 0.05)at shrub stage. There was significant correlation between litter decomposition rate and the litter layer enzyme activity of urease(P < 0.05)at shrub to tree stage. There was not significant correlation between the litter decomposition rate and the litter layer enzyme activity at small tree stage. Sucrase, urease and polyphenol oxidase were important factors affect litter decomposition at shrub stage. All these indicate that urease, cellulase and polyphenol oxidase are the important factors that affect the rate of decomposition of shrub to tree stage and small tree stage.]]> 2019/2/20 18:17:02 1, MA Jiangming^2,3*, QIN Yanghui¹, ZHANG Yajun¹, MO Yanhua¹, QIN Jiashuang¹, YANG Donglin¹]]> SU Jing¹, MA Jiangming^2,3*, QIN Yanghui¹, ZHANG Yajun¹, MO Yanhua¹, QIN Jiashuang¹, YANG Donglin¹ 4true 2019/2/20 18:17:02 1, HE Tieguang^1*, DU Hu², WEI Caihui¹, MENG Yancheng¹, LI Zhongyi¹, ZHANG Ye, WANG Jin¹, HU Junming¹, SU Tianming¹, FAN Shi³]]> YU Yuefeng¹, HE Tieguang^1*, DU Hu², WEI Caihui¹, MENG Yancheng¹, LI Zhongyi¹, ZHANG Ye, WANG Jin¹, HU Junming¹, SU Tianming¹, FAN Shi³ 3true 2019/2/20 0:00:00 1,2, CHEN Xingbin³, JIANG Yong^1,2*, LI Yuejuan^1,2, HUANG Yuxin^1,2, NI Mingyuan^1,2, LU Zhiren^1,2, QIN Caili^1,2, ZHONG Zhanglang^1,2]]> PAN Yuanfang^1,2, CHEN Xingbin³, JIANG Yong^1,2*, LI Yuejuan^1,2, HUANG Yuxin^1,2, NI Mingyuan^1,2, LU Zhiren^1,2, QIN Caili^1,2, ZHONG Zhanglang^1,2 2true G. paucinervis seeds by measuring the germination of seeds with different dehydration extents and the water absorption after rehydration, the change of physiological indices of resistance in the process of dehydration as well as the seed germination under different storage methods. The results were as follows:(1)The initial moisture content of G. paucinervis seeds was 45.29%. The dehydration rate was up to 45% when placed after 35 d in the indoor ventilated place.(2)When the dehydration rate was less than 18%, germination percentage(GP)and the water absorption rate after rewatering were not significantly different from those of fresh seeds. However, when the dehydration rate exceeded 18%, GP and the water absorption rate after rewatering were significantly decreased, and GP was 0 at dehydration rate 42%. The critical moisture content of seeds was 27.29%, and the lethal moisture content of 50% was 12.72%.(3)The relative conductivity, the contents of soluble sugar and proline were increased gradually with the deepening of seed dehydration. The content of malondialdehyde(MDA)changed little when the dehydration rate was less than 24%, and increased significantly when exceeding 24%. Both activities of superoxide dismutase(SOD)and peroxidase(POD)showed a trend of fluctuation and peaked at dehydration rate 18%.(4)Seeds with desiccation storage for one month at room temperature, and all the seeds with storage in damp sand at -1 ℃ and -20 ℃ for one month could not germinate. GP of seeds with water immersion for one month dropped significantly. Germination processes of seeds with storage in damp sand for one month, three months or six months at 4 ℃ were delayed, but there was no significant effect on GP. It indicates that when the dehydration rate of G. paucinervis is less than 18%, seeds can regulate resistance to maintain normal metabolism of cells. The seeds can endure a certain degree of dehydration and low temperature. When the dehydration rate exceeds 18%, the metabolism of seeds is unba-lanced, and then deteriorated until death, which belong to minimally recalcitrant seeds. It also indicates that storage in damp sand at 4 ℃(moisture content 7.5%)is a good method for short-term storage of G. paucinervis seeds.]]> 2019/2/20 18:17:02 1,2, CHAI Shengfeng¹, WANG Manlian¹, LÜ Shihong¹, WEI Xiao¹, WEI Jiqing^1*, WU Shaohua²]]> ZHANG Junjie^1,2, CHAI Shengfeng¹, WANG Manlian¹, LÜ Shihong¹, WEI Xiao¹, WEI Jiqing^1*, WU Shaohua² 1true