期刊论文

中文

水土保持通报

1000-288X

2008

28

3

34-38

10.13961/j.cnki.stbctb.2008.03.032

科技部“十五”重大科技攻关项目（2001BA606A-06） “十一五”科技支撑计划项目（2006BAC01A11-03）

本校为其他机构

在连续2 a内不施肥,每次刈割并全部取走地上部分的条件下,通过测定白三叶的生物量、生长因子及土壤有机质、全量养分、水解N、有效P和速效K等指标,了解生长状况及其对土壤养分的影响.结果表明,随刈割次数的增加,白三叶鲜重、干重、平均高度和径粗均呈下降趋势,年均降幅分别为14.34%,13.12%,5.20%和3.38%;表层土壤有机质下降最大为24.37%,最小为8.75%,白三叶草对表层土壤全量养分影响不明显,但对土壤速效养分影响显著,2 a间最大降幅分别为46.56%,43.63%,16.69%;底层土中的有机质和全量养分相似于表层土,速效养分中有效磷受到的影响最大,而水解氮和速效钾较小.经综合分析,增加刈割次数会导致土壤整...

A research on the growth status of Trifolium repens and it＇s influences on soil nutrients was performed through measuring its biomass and growth factor, as well as soil organic matter, total N, total P, total K, hydrolytic N, available P, and available K. The land without fertilizer application and with successive cutting within two years was selected, and each time, all Trifolium repens above soil was harvested for the experiment. The research indicates that with the increasing harvesting time, the fresh and dry weight of Trifolium repens, it...