%0 Journal Article
%T Seasonal dynamics of soil microorganisms and soil nutrients in fast-growing Populus plantation forests of different ages in Yili,Xinjiang,China<br>不同龄级速生杨人工林土壤微生物数量与养分动态变化
%A AN Ran
%A GONG Ji-Rui
%A YOU Xin
%A GE Zhi-Wei
%A DUAN Qing-Wei
%A YAN Xin
%A <br>安然
%A 龚吉蕊
%A 尤鑫
%A 葛之葳
%A 段庆伟
%A 晏欣
%J 植物生态学报
%D 2011
%I Editorial Office of Chinese Journal of Plant Ecology
%X Aims Our objective was to better understand the distribution and seasonal dynamics of soil microorganisms and soil nutrients of fast-growing Populus (Populus × euramericana) plantations of different ages (5, 10 and 15 years) in Yili Xinjiang, China. Methods We investigated the number and species composition of soil microorganisms and organic carbon/ nitrogen by means of plate count and conventional chemical methods, respectively. Important findings The three plantation forests were significantly different in microbial numbers and species compositions as affected by soil depth and season. The soil microbes were mainly distributed at 10–40 cm, and bacteria accounted the largest proportion. The total number of microorganisms and bacteria decreased with age, but the 15-year forest had the highest number of fungi and actinomycetes. The ratio of three kinds of microbial communities was relatively stable in soil and did not change with season. The content of soil organic carbon and nitrogen was mainly concentrated at 0–20 cm, decreased with increasing soil depth and responded differently to change of seasons and soil depth. Soil organic carbon increased with stand age, while nitrogen decreased and then increased. The correlation between soil microbes and soil organic carbon was negative, and the correlation between number of fungi and soil organic nitrogen was positive. The ratio of soil organic C/N was consistent with the ratio of bacteria number/ actinomycetes number, illustrating poplar plantation forests fix carbon and improve soil fertility.
%K fast-growing Populus plantation forest
%K seasonal dynamics
%K soil microbial number
%K soil organic carbon
%K soil organic nitrogen
%K vertical distribution<br>速生杨人工林
%K 季节变化
%K 土壤微生物数量
%K 土壤有机碳
%K 土壤有机氮
%K 垂直分布
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=90BA3D13E7F3BC869AC96FB3DA594E3FE34FBF7B8BC0E591&jid=2F2173CCFF292BF447DC2681EA33BBAE&aid=24214813CF9EB6876140467464ACF30F&yid=9377ED8094509821&vid=6209D9E8050195F5&iid=E158A972A605785F&sid=40862C82D74F7473&eid=238BD7580EFCC5AE&journal_id=1005-264X&journal_name=植物生态学报&referenced_num=0&reference_num=0