摘要
通过监测玉米生长季前后土壤中硝态氮含量及不同时期土壤含水量的变化,对玉米季硝态氮的淋失进行了研究.结果表明,在太行山前平原地区现有的灌溉施肥制度下,夏玉米生长季存在硝态氮的淋失,在每年施200,400,800kg/hm2处理下硝态氮的淋失量分别为2,16,50 kg/hm2.玉米生长季的第一、第二次灌水对土体硝态氮的分布有重要的作用,使不同处理的硝态氮累积在40～160cm土层.
By analysis the change of nitrate-nitrogen＇s contents in different soil layers during corn season and the change of the water content in the soil, we studied the leaching of nitrate-nitrogen during corn season. The results showed there had nitrate- nitrogen leaching during the corn season in Piedmont of Mountain Taihang. The nitrate-nitrogen move downward into the deep layers along with the water＇s percolation, and the leaching of nitrate-nitrogen were 2 kg/ha in 200 kg/ha treatment, 16 kg/ha in 400 kg/ha treatment, 50 kg/ha in 800 kg/ha treatment. The first and second irrigations had the most important role in the redistribution of nitrate-nitrogen, they made the nitrate accumulated in the 40- 160 cm soil layer.
出处
《华北农学报》
CSCD
北大核心
2005年第6期54-57,共4页
Acta Agriculturae Boreali-Sinica
基金
中国科学院知识创新工程项目(KZCX2-413-10)
国家自然科学基金资助项目(30570335)
