摘要
试验以‘新牧4号’紫花苜蓿为材料,研究不同刈割时间对苜蓿生殖生长及种子特性的影响,以期为提高苜蓿种子产量提供基础数据。在苜蓿返青后第30、37、44、51、58、65天,即2013年4月24日、5月1日、5月8日、5月15日、5月22日、5月29日进行刈割。试验数据表明,刈割对苜蓿生殖格局、种子产量和种子特性等影响较大。其中,返青后第44(5月8日)、51天(5月15日)刈割,与对照相比,种子千粒重分别增加24.44%、30%,种子产量分别提高26.85%、45.86%,种子发芽率分别降低了2.12%、10.63%。刈割能够延迟苜蓿花期,在苜蓿孕蕾至初花期间,适时刈割1次,能够提高花的传粉受精效率,降低生殖败育率,增加种子产量。
To study the effect of mowing time on the reproductive growth and provide basic data for improvingseed yield of alfalfa, Medicago sativa L.‘Xinmu No.4＇was used as the experiment material. Alfalfa weremowed on the 30th, 37th, 44th, 51st, 58 thand 65thday, namely on April 24, May 1, May 8, May 15, May 22 andMay 29 in 2013, after resuming growth. Alfalfa in the control group was not mowed. The results showed thatmowing time had important effect on reproductive pattern, seed yield and seed characteristics of alfalfa.Compared with the control group, 44（May 8） and 51（May 15） days after resuming growth, the thousand seedweight increased by 24.44% and 30%, seed yield increased by 26.85% and 45.86%, respectively. Whereas,seed germination rate reduced by 2.12% and 10.63%, respectively. Mowing could delay flowering period ofalfalfa. Mowing once during flower bud formation period to early blooming period can improve the fertilizationefficiency of flowers, decrease abortive reproductive rate and increase seed yield.
出处
《中国农学通报》
2016年第17期7-11,共5页
Chinese Agricultural Science Bulletin
基金
新疆农业大学草业科学国家重点学科开放课题“滴灌条件下紫花苜蓿刈割适其的研究”(XJCYQ201204)
农业部公益性行业专项“新疆荒漠区苜蓿高效种植关键技术研究与集成示范”(201403048-8)
关键词
苜蓿
刈割
生殖生长
种子
alfalfa
mowing
reproductive growth
seed
