摘要
为探索微量元素对苜蓿种子产量及种子特性的影响,为苜蓿种子生产合理利用微量元素提供参考依据,以‘新牧4号’紫花苜蓿(Medicago sativa L.‘Xinmu No.4’)为材料,在苜蓿现蕾期叶面喷施硼、钼、铁,通过测量花部特征、结荚率、种子产量和种子特性等指标,研究不同微量元素对苜蓿开花结实的影响。试验结果表明,喷施4 kg/hm2的硼砂,苜蓿单荚种子数和种子产量分别对照提高了9.67%、35%;喷施325 g/hm2的钼酸铵,单荚种子数和种子产量分别对照提高12.9%、17%;喷施3 kg/hm2的硫酸亚铁,单荚种子数和种子产量分别对照提高7.5%、69.46%;但喷施不同微量元素的各处理的结荚率均低于对照组(59.66%)。相关性分析表明,苜蓿种子产量与结荚率、单荚种子数和千粒重显著正相关。综合分析认为,在新疆昌吉地区,通过在苜蓿现蕾期喷施硼砂浓度为2.98 kg/hm2、钼酸铵浓度为325 g/hm2、硫酸亚铁的浓度为2.90 kg/hm2时,能够增加单荚种子数和千粒重,提高种子产量。
To found the influence rule of trace elements on seed yield and seed characteristics and providereference for rational use of trace elements in alfalfa seed production, Medicago sativa L.‘Xinmu No.4＇wasused as the material and trace elements boron, molybdenum, iron at different concentrations were sprayedduring the budding stage of alfalfa. Effects of different trace elements on blossom and fruiting characteristics ofalfalfa were studied by measuring the floral traits, podding rate, seed yield, seed characteristics and so on. Theresults showed that seed number per pod and seed yield of alfalfa were 9.67% and 35%, 12.9% and 17%, 7.5%and 69.46% higher than that of the control group when spraying 4 kg/hm2 borax, 325 g/hm2 ammoniummolybdate, 3 kg/hm2 ferrous sulfate, respectively. But podding rate of each treatment group was lower than thatof the control group（59.66%）. Correlation analysis showed that seed yield of alfalfa had significantly positivecorrelation with podding rate, seed number per pod and thousand seed weight. Comprehensive analysisrevealed that spraying borax, ammonium molybdate and ferrous sulfate at the concentration of 2.98 kg/hm2,325 g/hm2 and 2.90 kg/hm2 respectively could increase seed number per pod, thousand seed weight andimproved seed yield of alfalfa in Changji area of Xingjiang.
出处
《中国农学通报》
2015年第29期8-14,共7页
Chinese Agricultural Science Bulletin
基金
草业科学开放课题"滴灌条件下紫花苜蓿刈割适期的研究"(XJCYQ-2012-04)
新疆维吾尔自治区科技支撑计划"新疆牧草种质创新
新品种培育及草产业化研究与示范"(201230116-4)
十二五农村领域国家科技计划"新疆绿洲区优质牧草选育及生产利用技术集成与示范"(2011BAD17B05-2)
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
微量元素
结荚率
种子产量
alfalfa
trace elements
podding rate
seed yield
