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

图6 不同水氮处理下麦田土壤硝态氮淋失量 N0: 不施氮; N75: 施氮量为75 kg hm-2; N150: 施氮量为150 kg hm-2; N225: 施氮量为225 kg hm-2; N300: 施氮量为300 kg hm-2; W0: 不灌水; W1: 越冬期灌水600 m3 hm-2; W2: 越冬期和拔节期共灌水1200 m3 hm-2。柱上不同小写字母表示在同一水分条件下在0.05水平上有显著性差异(P < 0.05)。

Fig. 6 Nitrate nitrogen leaching under different treatments N0: no nitrogen application; N75: N application rate was 75 kg hm-2; N150: N application rate was 150 kg hm-2; N225: N application rate was 225 kg hm-2; N300:N application rate was 300 kg hm-21; W0: no irrigation; W1: irrigated 600 m3 hm-2 in overwintering period; W2: irrigated 1200 m3 hm-2 in overwintering period and jointing stage. Different letters above the bar mean significant differences at the 0.05 probability level under the same irrigation condition.