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1 北方麦区农户麦田1 m土层土壤硝态氮残留量的频数分布（a）和施氮量（b） 误差线表示均数标准差,不同小写字母表示不同硝态氮残留之间差异显著性（P<0.05）

Fig. 1 Frequency distribution (a) and N application rates (b) of nitrate N residue in 0-100 cm soil layer of farmers’ fields in northern wheat region of China Error bars are standard deviations of the means, and different lowercase letters above bars indicate significant differences among different ranges of nitrate N residue in soils at P<0.05 level