氮肥及多效唑对蓝茎冰草生长及种子产量的影响  

Effects of N fertilization and PP^(333) on the growth and seed yield of Agropyron smithii

作　　者：李世忠 韩建国[2] 

机构地区：[1]宁夏农业勘查设计院,宁夏银川750002 [2]中国农业大学草地研究所,北京100094

出　　处：《农业科学研究》2010年第1期19-22,共4页Journal of Agricultural Sciences

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氮肥和多效唑(PP333)对蓝茎冰草种子产量及其构成要素的影响.结果表明,施氮量达到90 kg/hm2时,种子产量便开始下降,而喷施多效唑后,有效提高了单位面积的生殖枝数和每个小穗上的小花数以及每个小穗上的种子数,最终影响了蓝茎冰草的种子产量.灌施多效唑对种子产量的效应不及喷施多效唑效果好,两者之间差异显著.The effects of seed yield and yield components of Agropyron smithii to different rates and method of nitrogen application and pp^333 were researched in Jiuquan of Gansu Province. The results indicated that seed yield decreased when fertilizing amount was over N 90 kg/hm2 and after applying pp333 on the leaves of Agropyron srnithii increased reproduction branches/m2, florets/spikelet, seeds/spikelet and seed yield. Applying pp333 on the leaves of Agropyron smithii was better than irrigating pp333 and there were significant differences.

关 键 词：蓝茎冰草 种子产量 施肥 多效唑 

分 类 号：S143.1[农业科学—肥料学]