典型红壤不同形态氮素迁移对长期施肥制度的响应

申凤敏,姜桂英,张玉军,刘芳,刘世亮,柳开楼

Response of Different Forms of Nitrogen Migration in Typical Red Soil to Long-Term Different Fertilization Systems

FengMin SHEN,GuiYing JIANG,YuJun ZHANG,Fang LIU,ShiLiang LIU,KaiLou LIU

表5 双季稻体系氮素平衡

Table 5 Nitrogen balance in double-rice system (kg·hm-2)

处理 Treatment 氮投入 Nitrogen input 氮输出Nitrogen output 氮表观损失 Apparent N loss 化肥 Mineral fertilizer 稻草 Straw 紫云英 Green manure 猪粪 Pig manure 起始无机氮 Initial Nmin 作物吸收 Crop uptake 残留无机氮 Residual Nmin CK 233.04c 91.60c 180.00c -38.56d NPK 90.0 247.68c 121.61b 203.04c 13.03c NPKS 90.0 35.2 135.5 329.28b 132.44b 383.18b 74.35b NPKSM 90.0 35.2 135.5 140.9 371.83a 171.51a 425.78a 176.14a