%0 Journal Article
%T Fine-root character and its action mechanism of forest at its initial reestablished stage on degraded red soil<br>退化红壤重建森林初期细根特征及其作用机理研究
%A LIU Yuanqiu
%A LUO Liangxing
%A LIU Liangying
%A YANG Jialin
%A XIA Xiaolan
%A <br>刘苑秋 罗良兴
%A 刘亮英
%A 杨家林
%A 夏晓兰
%J 应用生态学报
%D 2005
%I 
%X This paper studied the fine-root character and its action mechanism of forest reestablished by different models for 10 years on a seriously degraded red soil, and analyzed their correlation with soil property. The results showed that fine-roots mostly distributed in 0-20 cm soil layer, accounted for 73.39% -87.41% of those in 0-40 cm soil layer. There were notable differences in nutrient storage of fine-roots under different reestablishment models. The fine- roots of medium density pure Pinus serotina forest had a much higher storage of total nitrogen, phosphorus and potassium, with the content of total nitrogen, phosphorus, potassium, calcium and magnesium being 84.47, 5.55, 38.42, 17.00 and 10.76 kg hm(-2), respectively. Soil organic matter, total nitrogen, available nitrogen, available potassium and pH had significant correlations with fine-root biomass (P < 0.05). The effects of fine-roots on soil physical properties mainly reflected on soil capillary porosity and total porosity. Fine-roots obviously increased the contents of > 0.25 mm and > 5 mm soil waterstable aggregates, and improved soil structure-stability. The correlations between fine-roots and soil bacteria and microbial quantities were significant.
%K Degraded red soil
%K Forest reestablishment
%K Fine-root
%K Action mechanism<br>退化红壤
%K 重建森林
%K 细根
%K 作用机理
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=90BA3D13E7F3BC869AC96FB3DA594E3FE34FBF7B8BC0E591&jid=42FEDDFE54F8BCD9D5FD1926ABDD7722&aid=1E5BAEA2549D97C7&yid=2DD7160C83D0ACED&vid=7801E6FC5AE9020C&iid=9CF7A0430CBB2DFD&sid=E0E0A0F322B76027&eid=7C95AAC7652395EE&journal_id=1001-9332&journal_name=应用生态学报&referenced_num=5&reference_num=28