北方麦区小麦产量与蛋白质含量变化对土壤硝态氮的响应

马悦,田怡,苑爱静,王浩琳,李永华,黄婷苗,黄宁,李超,党海燕,邱炜红,何刚,王朝辉,石美

Response of Wheat Yield and Protein Concentration to Soil Nitrate in Northern Wheat Production Region of China

MA Yue,TIAN Yi,YUAN AiJing,WANG HaoLin,LI YongHua,HUANG TingMiao,HUANG Ning,LI Chao,DANG HaiYan,QIU WeiHong,HE Gang,WANG ZhaoHui,SHI Mei

图4 北方麦区不同麦田1 m土层土壤硝态氮残留量下的施氮量（a）、氮肥偏生产力（b）、氮肥吸收效率（c）、氮素利用效率（d） 误差线表示均数标准差。*表示处理之间差异显著性（P<0.05）

Fig. 4 Nitrogen rates (a), N partial factor productivity (b), N fertilizer uptake efficiency (c), and N utilization efficiency (d) at different nitrate N residue levels in 0-100 cm soil layer in northern wheat production region of China The error bar indicates standard deviation.* indicate significant differences among treatments at P<0.05