摘要
采用人工模拟降雨方法对陇中黄土高原连续实施5 a的4种耕作措施:传统耕作(T),传统耕作结合秸秆还田(TS),免耕(NT),免耕加秸秆覆盖(NTS)下豌豆地收获后的径流起始时间、径流量、土壤侵蚀量进行了研究。结果表明,在降雨强度为85 mm/h的条件下,NTS可以延缓径流,减小径流强度。与NT,TS,T这3种处理比较,NTS的径流量分别降低了2.4%,12.1%,34.7%。入渗量分别增加了2.7%,13.6%,38.6%。径流出现时间分别延迟1.17,0.83,3.83 min。土壤侵蚀量减少了0.3%,17.7%,62.4%。可见,免耕秸秆覆盖的水土保持效应最为明显,传统耕作的方式极易发生土壤侵蚀。
Four tillage treatments were carried out .for five years by simulated rainfall in the middle area of the Loess Plateau： traditional tillage （T）, traditional tillage with straw incorporated （TS）, no-tillage （NT）, and no-tillage with straw cover （NTS）. Runoff starting time, amount of runoff, and amount of soil erosion were measured after harvest of pea. Under rainfall intensity of 85 mm/h, runoff process was alleviated and the amount of runoff was reduced using NTS. Compared to NT,TS, and T, the amounts of runoff under NTS were reduced by 2. 4%,12. 1%, and 34. 7%, respectively; infiltration rates were increased by 2. 7%, 13.6 %, and 38.6% ; runoff starting times were slowed down 1.17, 0.83, and 3.83 min; the amounts of soil erosion were reduced by 0.3%,17.7%, and 62.4%. Therefore, the effects of soil and water conservation under NTS are most obvious and soil erosion is easily to take place under traditional tillage.
出处
《水土保持通报》
CSCD
北大核心
2007年第6期16-19,共4页
Bulletin of Soil and Water Conservation
基金
中澳合作项目ACIAR"提高甘肃黄土高原西部雨养农业系统生产力及其可持续性的研究"(LWR2/1999/094)
国家科技支撑计划"黄土高原丘陵沟壑区保护性耕作技术集成研究与示范"(2006BAD15B06)
关键词
保护性耕作
模拟降雨
土壤侵蚀量
黄土高原
豌豆
地表径流
conservation tillage
simulated rainfall
quantity of soil erosion
Loess Plateau
pea
runoff
