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Articles by Yingjun Zhang
Total Records ( 3 ) for Yingjun Zhang
  WenJun Zhang , YingJun Zhang , JuanJuan Song , WenQing Chen and GaoWen Yang
  The purpose of this study was to explore clonal integration of Leymus chinensis under heterogeneous alkaline conditions. The experiment consisted of three levels of substrate alkaline (8.5, 10, pH 11.5 ), two clonal integration treatments (rhizomes severed or not). Clonal integration enhanced the survival, growth of daughter ramets experiencing alkaline stress, especially for young ramets whereas the performance of mother ramets was reduced by clonal integration. Therefore, clonal integration did not affect performance of the whole clones.
  Hanshu Zhou , Gaowen Yang and Yingjun Zhang
  The research is conducted at a degraded steppe in Hebei province, China. Researchers took four sample areas which are dominated by fringed sagebrush (Artemisia frigida), narrowleaf stellera (Stellera chamaejasme), shining speargrass (Achnatherum splendens), white swordflag (Iris lactea), respectively. Phosphorus (P) was applied at four levels (0, 5, 10 and 15 mg kg-1 soil) in each sample area. The AM fungi colonization and the organic acid exudation in the rhizosphere were affected by the concentration of soil available phosphorus. These results suggested that the difference of soil P content is probably the cause of the appearance of four patches.
  Guomei Yin , Yongzhi Liu , Yingjun Zhang , Jinhua Zhao , Junying He , Yanlin Xue and Xiaoqing Zhang
  To investigated the tolerance response of Fringed sagebrush (Artemisia frigid Willd.) to three grazing intensities in the desert steppe of Inner Mongolian in China, the relationships between them were analyzed from two different aspects, plant height and leaf epidermis micro-morphology. As grazing pressure increased, plant height was the better trait of grazing response. At the height level researchers predicted that plants with a negative response to grazing would be ingest by sheep with grazing intensity increasers. At the leaf epidermis micromorphology level, researchers predicted that with higher grazing intensities would have stomatal subsidence, skin folds increase. The results of this exploratory study suggest that prediction of grazing responses on the basis of easily measured plant traits is feasible and consistent between similar grazing systems in different regions. The results challenge the precept that high intensity sheep grazing necessarily change species with micromorphology and height.
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