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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。
In order to make the barren hillsides in northwestern Guangxi Province to seal the hills as quickly as possible and improve their economic and ecological benefits, the article introduced and evaluated the economic benefits and ecological benefits of the introduced peas. The economic yield and ecological benefits of this plant were as follows: 1410kg / hm2, the highest biomass was 22980kg / hm2, and the lowest was 18020kg / hm2. With the increase of planting years, the average annual contents of soil organic matter, total nitrogen, total phosphorus and total potassium increased by 41.5% ~ 60.3% % ~ 11 72%, 8 96% ~ 19 80%, 12 28% ~ 46 43%. Soil erosion and surface water runoff decreased significantly, which were 220 2t / hm2 and 167 2m3 / hm2, respectively. Is 0 010.