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5 2017?2019年小麦收获后0~200 cm土层土壤硝态氮含量剖面图 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。*表示0.05水平显著; **表示0.01水平显著; ***表示0.001水平显著。

Fig. 5 Soil nitrate nitrogen content in 0-200 cm profile after wheat harvest in 2017-2019 W0: no irrigation; W1: irrigated 600 m3 hm-2 in overwintering period; W2: irrigated 1200 m3 hm-2 in overwintering period and jointing stage. * indicates significant at the 0.05 probability level; ** indicates significant at the 0.01 probability level; *** indicates significant at the 0.001 probability level.