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

表2 北方麦区1 m土层不同土壤硝态氮残留下地上部生物量和收获指数

Table 2 Biomass and harvest index of wheat at different nitrate N residue levels in 0-100 cm soil layer in northern wheat production region of China

硝态氮残留 Nitrate N residue (kg·hm^-2)	地上部生物量Aboveground biomass (kg·hm^-2)				收获指数Harvest index (%)
硝态氮残留 Nitrate N residue (kg·hm^-2)	农户施肥 FF	监控施肥 RF	监控无氮 RF-N	平均 Average	农户施肥 FF	监控施肥 RF	监控无氮 RF-N	平均 Average
<55	10397 ab	11042 a	8223 b	9887 C	42.6 a	42.1 a	42.2 a	42.3 B
55-100	15244 a	15388 a	14230 b	14954 A	48.5 a	49.8 a	48.4 a	48.9 A
100-200	11470 b	11924 a	11612 ab	11669 BC	42.2 a	41.3 a	41.1 a	41.6 B
200-300	12539 a	14109 a	13578 a	13409 AB	45.9 a	44.9 a	44.6 a	45.1 AB
>300	14388 a	14722 a	12161 a	13757 AB	44.4 a	45.2 a	44.5 a	44.7 B
平均Average	12715 a	13257 a	12206 b		44.5 a	44.4 a	43.8 a