灌溉及多效唑对蓝茎冰草生长及种子产量的影响  

The effects of irrigation and PP333 on the growth and seed yield of Agropyron smithii

作　　者：徐坤[1,2] 李世忠 

机构地区：[1]宁夏大学西北退化生态系统恢复与重建教育部重点实验室,宁夏银川750021 [2]宁夏大学西部生态与生物资源开发联合研究中心,宁夏银川750021 [3]宁夏农业勘查设计院,宁夏银川750002

出　　处：《草业科学》2011年第7期1291-1295,共5页Pratacultural Science

基　　金：国家"948"重大项目(202009)专题"牧草种子生产的研究与示范"

摘　　要：在甘肃省酒泉地区研究灌溉和多效唑对蓝茎冰草(Agropyron smithii)种子产量及其构成要素的影响。结果表明,蓝茎冰草从返青到收获,返青期、拔节期、抽穗期、灌浆期、盛花期灌溉5次水的生殖枝数/m2、小穗数/生殖枝和种子产量最高,但每个时期的灌溉量不宜过于充足,以防止植株倒伏;拔节期灌溉有利于生殖枝数/m2和种子数/小穗的增加,生殖枝数/m2和种子数/小穗与种子产量之间相关性极显著;返青期一次性喷施0.022 5%的多效唑0.3kg/hm2对提高生殖枝数/m2、小穗数/生殖枝、小花数/小穗、种子数/小穗以及种子产量效果显著;灌施多效唑有效地提高了种子数/小穗,最终也提高了种子产量。多效唑喷施的效果较灌施好。The paper studied the effects of irrigation and PPa3a on the seed yield and yield components in Ji- uquan of Gansu province. The results indicated that there were optimal seed yield, fertile tillers/m2 and spikelets/fertille tiller for western wheatgrass, when ing period, earing period, filled period and flowering rigation have been cautious not to bring on lodging. at five times of irrigation, in turn green period, joint- period, respectively, in the season of growth. The ir- Jointing stage irrigation was in favor of fertile tiller and seed number, fertile tillers/m2 and seed number, the most productive factors in all the yield compo- nents, were significantly correlative with the yield; Sprinkling with one-off 0.3 kg/hm2 PP333 of 0. 022 5 in green period, which were remarkable effects on increasing the fertile tillers/m2,spikelets/fertille tiller, florets/spikelets tiller, seed/spikelets tiller and the seed yield; Irrigation with PP333 improved effectively seed/spikelets tiller and the seed yield. The effects of sprinkling with PP333 were better than irrigation with PP333.

关 键 词：蓝茎冰草 种子产量 灌溉 多效唑 

分 类 号：S543.9[农业科学—作物学]