摘要
以野外试验和室内分析相结合的方法,研究了黄土高原南部黄土侵蚀时养分变化的规律。结果表明,泥沙样中有机质、全氮、水解氮的含量均大于降雨前所采的坡地表土样。不同耕作措施相比,采用等高沟垄耕作养分流失浓度小、流失量最少。土壤养分的流失随雨强增大而逐渐增加,雨强达1.0mm/min上下时,流失浓度最大,后随雨强增大泥沙样中养分含量略有降低。
Based on field experiment and laboratory analysis, regular pattern of variation of soil nutrient was studied in south of the Loess Plateau. The results showed that the contents of organic matter, total nitrogen and available nitrogen in the sediment were more than that of soil sample. The influences of different cultivation activities on nutrient loss were different. The runoff of nutrient was the least with the method of coutour furrow. The little rainfall intensity is, the more soil nutrients is kept.
出处
《西北林学院学报》
CSCD
北大核心
2003年第3期19-21,共3页
Journal of Northwest Forestry University
基金
西北农林科技大学重点科研专项(20000203093)
关键词
黄墡土
养分流失
耕作措施
loessal soil
nutrients loss
cultivation method
