施氮肥时间对苜蓿结荚率及种子产量的影响  

Effects of nitrogen fertilizer application time on pod retention rate and seed yield of alfalfa

作　　者：王玉祥 李陈建 陈述明[1] 朱进忠[1] 

机构地区：[1]新疆农业大学草地资源与生态重点实验室,新疆乌鲁木齐830052

出　　处：《草业科学》2015年第2期231-235,共5页Pratacultural Science

基　　金：新疆维吾尔自治区科技支撑计划(201230116-4);西北荒漠灌区苜蓿高效种植关键技术研究与集成示范(201403048-8)

摘　　要：试验以新牧4号紫花苜蓿(Medicago sativa cv.Xinmu No.4)为材料,研究在苜蓿不同生育期施氮肥对苜蓿结荚率、千粒重、种子产量等的影响,为提高苜蓿结荚率、增加种子产量提供依据。结果表明,返青期施氮肥处理的苜蓿荚果结荚率、种子千粒重以及种子发芽率均高于其他处理,依次为63.87%、2.01g和85.33%;但其单序荚果数和结荚率均低于其他处理;在各个处理中,现蕾期施氮肥处理苜蓿种子产量最高(802.16 kg·hm-2),分枝期次之(641.29kg·hm-2),分别是对照(390.34kg·hm-2)的2.05倍和1.64倍。本研究结果能够为苜蓿种子田的合理施肥提供理论依据。In order to improve pod retention rate and seed yield of alfalfa,effects of nitrogen fertilizer application time on pod retention rate,1 000-seed weight,seed yield of Medicago sativacv.Xinmu No.4were studied.The results showed that the pod retention rate,the 1 000-seed weight and seed germination rate with the treatment of fertilized at returning green stage were higher than that in the other treatments which was 63.87%,2.01 g and 85.33%,respectively.However,the pods number per inflorescence and pod retention rate of this treatment were lower than that in the other treatments.The seed yield was highest if fertilized at the budding stage which was 802.16kg·ha-1 and 2.05 times of control and the seed yield was higher if fertilized at branching stage which was 641.29kg·ha-1 and 1.64 times of control.These results provided a theoretical basis for rational fertilization of alfalfa seed field.

关 键 词：施肥时间 花 荚果 种子产量 

分 类 号：S541.9[农业科学—作物学]