节水减氮对土壤硝态氮分布和冬小麦水氮利用效率的影响

雒文鹤,师祖姣,王旭敏,李军,王瑞

Effects of water saving and nitrogen reduction on soil nitrate nitrogen distribution, water and nitrogen use efficiencies of winter wheat

Wen-He LUO,Zu-Jiao SHI,Xu-Min WANG,Jun LI,Rui WANG

表1 试验地0~60 cm土层基础理化性状

Table 1 Basic physicochemical properties of the experiment soil (0-60 cm)

土层 Depth (cm) 有机质 Organic matter (g kg-1) 全氮 Total N (g kg-1) 硝态氮 Nitrate N (mg kg-1) 全磷 Total P (g kg-1) 速效磷 Available P (mg kg-1) 全钾 Total K (g kg-1) 速效钾 Available K (mg kg-1) 0-20 19.06 1.24 12.46 0.99 27.59 10.85 243.87 20-40 15.03 1.00 14.53 0.86 15.06 10.59 222.31 40-60 10.95 0.79 23.08 0.62 3.54 9.90 193.96