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2 北方麦区不同麦田小麦籽粒产量与1 m土层土壤硝态氮残留量的关系（a）,产量对氮肥减施的响应（b） 图2-a数据由农户施肥、监控施肥、监控无氮、监控无磷、监控无钾处理组成。图2-b误差线表示均数标准差。不同小写字母表示处理之间差异显著性（P<0.05）,不同大写字母表示不同硝态氮残留梯度之间差异显著性（P<0.05）。图3,图4同

Fig. 2 Relationship of wheat grain yield to nitrate N residue in 0-100 cm soil layer (a), and the response of grain yield to reduced N fertilizer (b) in northern wheat production region of China Fig.2-a: Data is composed of FF, RF, RF-N, RF-P, RF-K. Fig. 2-b: Error bars are standard deviations of the means. Different lowercase and capital letters represent significant differences among three treatments and different ranges of soil nitrate N residue at P< 0.05 level, respectively. The same as Fig. 3, Fig. 4