Simulated experiment was used in this experiment to study the effects of soil factors on the farmland nitrogen losses and its concentration under artificial rainfall and natural rainfall. A number of soil and landscape factors were taken into account such as slope gradient, plant covers, fertilizers’ application performances as well as rainfall intensity. The result showed: the concentration of total nitrogen (TN) and the loss rate increased when the slope gradient became high; there has no significant difference in TN concentration between under artificial rainfall and under natural rainfall, TN concentration in runoff is smaller with the courser soil texture; and obviously lower with wheat planting than without covering, among which the loss decreased 11.80~238.46kg/hm2; in condition of the same N application account, diffuse application of fertilizer caused more nitrogen loss than cave application.
Zhang Naimingm, Zhang Yujuan, Chen Jianjun, Li Chengxue
. Factors of Influencing Soil-nitrogen Pollution Load of Sloping Field in the Dian Lake Watershed[J]. Chinese Agricultural Science Bulletin, 2004
, 20(5)
: 148
-148
.
DOI: 10.11924/j.issn.1000-6850.0405148
1朱兆良.农田中氮肥的损失与对策[J].土壤与环境,2000,9(1):1~6
2 Byrnes B H. Environmental effects of N fertilizer use. An review. Fertilizer Research,1990,26:209~215
3王庆仁,等.论合理施肥与土壤环境的可持续性发展[J].环境科学进展,1999,7(2):116~123
4邬伦,李佩武.降雨过程与氮、磷流失特征研究.环境科学学报,1996,16(1):1~115
5段永惠,张乃明.滇池流域农村面源污染状况分析.环境保护,2003,7:28~30
6《土壤农业化学常规分析方法》编委会.土壤农业化学常规分析方法,北京:科学出版社,1983.285~286
