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2，16，50kg/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。

关键词: NO3--N淋失, 水量平衡, 太行山前平原

Abstract: 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 nitratenitrogen were 2kg/ha in 200kg/ha treatment,16kg/ha in 400kg/ha treatment,50kg/ha in 800kg/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 40-160cM soil layer.

Key words: Nitrate-nitrogen leaching, Water balance, Mountain Taihang piedmont

中图分类号: 

• S513.01