摘要
为了使桂西北地区的荒山坡地尽快育林封山,提高其经济和生态效益,文章对引种木豆进行了试验分析和评价,其经济和生态效益表明:木豆产量最高达1980kg/hm2,最低为1410kg/hm2;生物量最高达22980kg/hm2,最低为18020kg/hm2;随着种植年份的增加,土壤有机质、全氮、全磷和全钾年均分别增加4 15%～6 30%、3 98%～11 72%、8 96%～19 80%和12 28%～46 43%,土壤的侵蚀量和地表水径流量都显著下降,分别为220 2t/hm2和167 2m3/hm2,径流系数仅为0 010。
For the barren hill was afforested in Northwest Guangxi, raising efficiency of economy and ecological by way of importplant Cajanus cajanc(1) Millsp. Analysis on efficency of economy and ecological, the results showed that in productivity higher was 1980 kg/hm2, smaller was 1410kg/hm2, in biomass higher was 22980kg/hm2, smaller was 18020kg/hm2. The organic matter was increased by 4.15%～6.13%, total N was increasd by 3.98%～11.72%, total P was increased by 8.96%～19.80% and total K was increasd by 12.28%～46.43%, yearly soil average erosion module and runoff amount were decreased respectcvely 220t/hm2 and 167.2m3/hm2.
出处
《资源开发与市场》
CAS
2003年第2期67-68,共2页
Resource Development & Market
基金
中国科学院"九五"重大项目(KF 95 02)
广西壮族自治区重点支持项目(桂科星9721024)的部分内容。
