%0 Journal Article
%T Effects of cultivation on organic carbon fractionation and aggregate stability in Xinjiang oasis soils<br>垦殖对新疆绿洲农田土壤有机碳组分及团聚体稳定性的影响
%A XU Wanli
%A TANG Guangmu
%A SHENG Ji
%A ong
%A LIANG Zhi
%A ZHOU Bo
%A ZHU Min Institute of Soil
%A Fertilizer & Agricultural Sparing Water
%A Xinjiang Academy of Agricultural Science
%A Urumqi
%A China Faculty of Glassl
%A &Environment Sciences
%A Xinjiang Agricultural University
%A Xijiang Urumqi
%A China
%A <br>徐万里
%A 唐光木
%A 盛建东
%A 梁智
%A 周勃
%A 朱敏
%J 生态学报
%D 2010
%I 
%X Soil organic carbon is an important indicator of soil quality, and labile organic carbon fractions play an important role in soil quality development. In this study, fractionation of labile soil organic carbon was performed to evaluate the effects of cultivation practices on the changes of organic carbon and aggregate stability in soils of the desert area. The results showed that organic carbon content significantly increased in 1-5 years after the low organic matter natural soil was converted to cotton field, with an mean annual increase of 0.65 g kg-1 or increased by 76%-286%. Soil organic C attained relative balance after 5 years of cultivation. Soil labile organic carbon (LOC) and light fraction organic carbon (LFOC) increased significantly in 1-5years, with an average increment of 72%-99%, but declined after 5 years of cultivation. Particulate organic carbon (POC) significantly increased in 1-10 years of in cultivation, with a maximum increase of 275%, and declined after 10 years of cultivation. Water\|stable aggregates (WSA) in soil increased significantly with cultivation, up to 75% as compared with the original natural soil in 0-20 years. These results indicate that cultivation has an important influence on soil organic carbon pools of the oasis farmland. Long\|term of cultivation of the desert soil tends to decrease labile organic carbon and subsequently may potentially cause degradation of soil quality, which merits further attention.
%K ultivation
%K labile organic carbon
%K light fraction organic carbon
%K particulate organic carbon
%K aggregate stability<br>垦殖
%K 活性有机碳
%K 轻组有机碳
%K 颗粒有机碳
%K 团聚体稳定性
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=90BA3D13E7F3BC869AC96FB3DA594E3FE34FBF7B8BC0E591&jid=FE163E5DB2274E5937319DE98913EC37&aid=D9E54DE2037B704EA9C1EB09B5EA1B09&yid=140ECF96957D60B2&vid=340AC2BF8E7AB4FD&iid=DF92D298D3FF1E6E&sid=420937A57970FA8C&eid=1B1F9B96EF7F53E5&journal_id=1000-0933&journal_name=生态学报&referenced_num=0&reference_num=45