作物学报 ›› 2026, Vol. 52 ›› Issue (4): 1208-1219.doi: 10.3724/SP.J.1006.2026.51083
侯思宇(
), 王国璀, 韦金贵, 谢玮欣, 殷文, 樊志龙, 柴强*(
), 胡发龙*(
)
Hou Si-Yu(
), Wang Guo-Cui, Wei Jin-Gui, Xie Wei-Xin, Yin Wen, Fan Zhi-Long, Chai Qiang*(
), Hu Fa-Long*(
)
摘要:
针对西北干旱灌区适宜小麦高效生产的绿肥配置技术缺乏、小麦高产潜力挖掘不足等问题, 通过开展绿肥配施化学氮肥对小麦干物质积累、转运分配及产量形成的影响研究, 以期为小麦高产探寻适宜的绿肥配置技术。2022—2024年, 采用二因素随机区组设计, 以小麦为研究对象, 设不施化学氮肥(N0)和施用180 kg hm-2化学氮肥(N1) 2个施氮水平, 麦后夏休闲(G0)、绿肥还田15,000 kg hm-2 (G1)、绿肥还田30,000 kg hm-2 (G2)、绿肥还田45,000 kg hm-2 (G3) 4个还田量水平。结果表明, 绿肥和化学氮肥均显著提高了小麦产量和收获指数, 且绿肥强化了化学氮肥的增产效应。与N0相比, N1处理下的小麦籽粒产量、生物产量和收获指数分别提高23.0%、11.8%和10.4%; 与G0相比, G1、G2和G3处理下的籽粒产量分别提高22.2%、32.5%和35.5%, 生物产量分别提高14.4%、18.5%和20.0%, 收获指数分别提高7.2%、12.1%和13.4%。此外, 与N1G0相比, N1G1、N1G2和N1G3籽粒产量分别提高15.4%、27.0%和24.0%, 生物产量分别提高8.8%、11.6%和11.2%, 收获指数分别提高6.1%、13.8%和11.4%, 以N1G2处理增产效应最显著。绿肥和化学氮肥均可提高小麦干物质积累速率、促进干物质花前转运和花后积累、提高成熟期干物质在籽粒中的分配量, 且绿肥强化了化学氮肥促进干物质积累和转运分配效应, 以绿肥还田30,000 kg hm-2效果最佳。与N1G0相比, N1G2小麦苗期至拔节期、拔节期至花期、花期至成熟期干物质积累速率分别提高7.9%、11.1%和8.0%, 干物质最大增长速率和全生育期平均增长速率分别提高10.4%和11.5%, 花后积累量和花后积累贡献率分别提高40.0%和10.2%, 成熟期籽粒干物质及其占比分别增加27.0%和14.0%。在西北干旱灌区, 30,000 kg hm-2毛叶苕子配施180 kg hm-2化学氮肥能促进小麦干物质积累及转运分配, 是该区小麦高产栽培的可行措施。
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