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3 北方麦区1 m土层不同土壤硝态氮残留下产量三要素

Table 3 Grain yield components 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)	穗数Spike number (×10⁴·hm^-2)				穗粒数Grain per spike				千粒重1000 grain weight (g)
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	农户施肥FF	监控施肥RF	监控无氮RF-N	平均Average
<55	404 a	452 a	331 a	396 C	27 a	30 a	34 a	30 AB	42.8 a	40.1 a	36.0 a	39.6 A
55-100	534 a	543 a	553 a	543 A	34 a	34 a	31 b	33 A	42.2 a	42.4 a	42.9 a	42.5 A
100-200	389 ab	415 a	387 b	397 C	30 a	28 ab	28 b	29 AB	42.1 a	42.2 a	44.2 a	42.8 A
200-300	415 a	468 a	447 a	443 BC	32 a	33 a	31 a	32 AB	45.9 a	42.6 a	44.1 a	44.2 A
>300	481 a	559 a	452 a	497 AB	29 a	28 a	26 a	28 B	42.7 a	41.3 a	41.2 a	41.7 A
平均Average	439 ab	473 a	435 b		31 a	30 a	29 b		42.8 a	42.0 b	42.7 ab