摘要
研究了滇池流域集约化地区设施条件下氮磷化肥对土壤硝酸盐的累积规律。研究结果表明:土壤中硝酸盐的积累主要受氮肥施用量的影响,磷肥对土壤中硝酸盐的积累的影响,因种植的作物不同而有较大的差异,在种植辣椒的土壤中,磷肥对土壤硝酸盐积累有显著影响,施磷降低土壤中的硝酸盐。在种植西芹的土壤中,磷肥对土壤中硝酸盐的影响因氮肥的投入量不同而有不同的表现,生菜中施磷对土壤硝酸盐累积无显著影响。
The rules of nitrate accumulation in Dian lake drainage area in intensive cultivation are studied. The results show that fertilizer N is the prime cause of the accumulation of NO3^- in soil. The effects of P on NO3^- accumulation in soil differ from crops to crops. The fertilizer P input evidently influences the accumulation of NO3^- in the soil of cultivating pimiento, and the increase of fertilizer P input is able to decrease NO3^- accumulation. The effects of P on NO3^- accumulation are different according to the changes of N input, There are no evident effects on the NO3^- accumulation in the soil of cultivating lettuce with P input.
出处
《云南农业大学学报》
CAS
CSCD
2004年第3期330-334,共5页
Journal of Yunnan Agricultural University
基金
国家科技部"十五"重大专项资助(K99-05-35-02)
关键词
滇池流域
设施栽培
氮磷
硝酸盐累积
dian lake drainage area
protection cultivation
N and P
nitrate accumulation
