摘要
２５°以上陡坡地灌桑隔坡垄槽栽培研究结果表明，较对照土壤侵蚀量０．７９９～１０．８ｔ／亩，降为零，桑树根系主要分布层５ｃｍ与１００ｃｍ深土壤含水量较对照高出１０．２％～３３．６７％与８．２７％～６５．３７％１５０ｃｍ与１００ｃｍ深土壤全氮较对照低１０％和０．０％，全磷则高出２．９％和２６．２％，全钾高出３．１８％和８．０１％，水解氮低于对照３８．５２％，速效磷高出３９．０２％和９７．７２％，速效钾低于对照８．５２％和７．４６％；亩均产叶量和产茧量均较对照高出５～１０倍；经济效益较对照高出１１．８８倍。社会、经济、生态三大效益显著。
The study results of ridge trough culture of bush mulberry on steep sloping land sbow,incompared with control experiment ,soil erosion amount increased from 0.799～10.8/mu to 0 ton/mu,soil water content at depth of 50cm and 0～100cm is 110.2%～133. 67%and 108.27%～165.37%,soil nutrient concen tration at both depth of 0～50cm and 0～100cm is 90%and 100% ofthe control ones respectively for total N,102.9%and 126.2%for total P,103.18%and 108.01%for total K,61.5%and 61.15%for available N(hydrolysed N),139.02%and 197.72%for avail-able P and 91.48%and 92.54%for available K. The leaf and cocoon production increased to 5～10times of control ones. The economic benefit increased to 11.88 times,The benefit of society,econo-my and ecology is significant.
出处
《水土保持学报》
CSCD
北大核心
1994年第2期91-96,共6页
Journal of Soil and Water Conservation
基金
"八五"国家科技攻关项目
关键词
垄槽栽培
水保效益
桑树
陡坡地
bush mulberry ridge trough cultivation soil nutrient soil and water conserva- tion benefit
