摘要
为探讨百喜草在喀斯特山区水土流失理治中的效果 ,1999～ 2 0 0 2年在牟尼河小流域进行了百喜草不同种植模式的水土保持效应的初步研究。结果表明 ,种植百喜草能有效增加地表覆盖 ,降低径流量与泥沙冲刷量。在同样的坡度下 ,种植百喜草比裸地可降低径流量、减少泥沙冲刷量 ,种植当年百喜草区及梯田果树牧草的径流量与土壤流失量分别是坡地作物区的 84 3%、4 7 9%和 2 2 6 %、7 1% ,次年土壤流失量降低为 7 3%和 7 7% ;还可有效改善土壤理化性质 ,维持和培肥土壤地力。百喜草区与裸地及坡地玉米区相比 ,土壤容重分别降低17 6 %和 11 5 % ,总孔隙度分别增加 30 1%和 2 3 4 % ,渗透速率分别提高 4 7 8%和 6 3% ,有机质分别增加34 8%和 2 2 8% ,碱解氮分别增加 6 1 5 %和 34 7% ,有效磷分别增加 2 7 2 %。
To investigate the effects of Bahiagrass on controlling water and soil erosion in Karst region,a preliminary study had been conducted with different planting modes of Bahiagrass in the period of 1999-2002.The results showed that planting Bahiagrass could increase the cover rate of earth surface,reduce surface runoff,intercept rain water and enhance moisture content of soil.In comparison with naked and slope corn field,planting Bahiagrass could lower the soil permit weight 17.6% and 11.5%,increase the total hole degree 30.1% and 23.4%,raise the permeating velocity 47.8% and 6.3%,increase the soil organic matter 34.8% and 22.8%,the alkali solution nitrogen 61.5% and 34.7%,effective phosphorus 27.2% respectively.
出处
《山地农业生物学报》
2004年第5期408-411,共4页
Journal of Mountain Agriculture and Biology
基金
贵州省科学技术基金资助项目 (黔基合计字 2 0 0 1-3 0 41)
关键词
百喜草
种植模式
水土保持效应
地面径流
土壤侵蚀
土壤理化性质
Bahiagrass
planting mode
soil and water conservation
surface runoff
soil erosion
physics and chemistry characters of soil
