摘要
随着氮肥投入量增加，各个层次土壤中硝酸盐也明显增加，在LF和HF处理中，各个层次土壤中硝酸盐与施肥量成正相关。HF处理土壤中硝酸盐是CK处理的数倍到数十倍。在各个处理中．硝酸盐主要在30—90cm和150cm土层中形成累积。随着施肥量的增加，作物硝酸盐含量也随着增加。
The research shows that the concentration of nitrate in different deeps soil is increased with amount of N input. It is positive relation with amount of N input,The concentration of nitrate in treat HF is more than ten times in treat CK. Nitrate is mostly accumulated in soil deeps 30-90cm and 150cm. Concentration of nitrate in plant is increased in evidence with N input.
出处
《西南农业学报》
CSCD
2007年第3期435-438,共4页
Southwest China Journal of Agricultural Sciences
基金
省院省校科技合作项目:高精度数字土壤及互动式技术在作物养分管理中应用项目(2004YX37)
关键词
施肥量
硝酸盐
累积
土壤
fertilizer
nitrate
accumulation
soil
