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3 不同水氮处理下冬小麦百千克籽粒吸氮量

Table 3 Nitrogen uptake of 100 kg grain in winter wheat under different water and nitrogen treatments (kg)

2017?2018 2018?2019 W0 W1 W2 平均Mean W0 W1 W2 平均Mean N0 1.65 d 2.13 b 2.40 b 2.06 c 6.26 a 1.57 d 3.59 a 3.81 ab N75 2.06 cd 2.19 b 2.48 b 2.24 bc 5.48 a 1.76 cd 3.25 a 3.50 b N150 2.48 bc 2.26 b 2.55 b 2.43 b 5.89 a 2.02 bc 3.12 a 3.67 ab N225 2.82 ab 2.48 ab 3.10 ab 2.80 a 5.69 a 2.24 b 3.13 a 3.68 ab N300 3.01 a 2.75 a 3.38 a 3.05 a 6.37 a 2.68 a 3.49 a 4.18 a 平均Mean 2.41 b 2.36 b 2.78 a — 5.94 a 2.05 c 3.31 b — F-value N 16.87*** 2.11NS W 9.31** 212.65*** N×W 1.26NS 0.97NS