密度对苜蓿种子产量及其构成因子的影响  

Influence of Planting Density on Alfalfa Seed Yield and Components

作　　者：麦麦提敏·乃依木 古丽孜拉·哈不都拉 王玉祥 Maimaitimin·Naiyimu;Gulizila·Habudoula;Wang Yuxiang(West Arid Desert Area of Grassland Resources and Ecology Laboratory/ Xinjiang Agricultural University, Urumqi 830052;Grassland Station of Xinjiang, Urumqi 830049)

机构地区：[1]西部干旱荒漠区草地资源与生态实验室/新疆农业大学,乌鲁木齐830052 [2]新疆维吾尔自治区草原总站,乌鲁木齐830049

出　　处：《中国农学通报》2019年第19期41-44,共4页Chinese Agricultural Science Bulletin

基　　金：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);国家牧草产业技术体系“披碱草无芒雀麦品种改良”(CARS-34)

摘　　要：为研究密度对苜蓿生殖格局的影响,在滴灌条件下,苜蓿行距30 cm,通过设置5、10、15、20、25、30 cm株距,研究其对苜蓿种子产量及其构成因子的影响。研究结果表明,密度对苜蓿的种子产量等影响较大,其中,结荚率较高的是10 cm株距处理,高达59.66%,但其种子产量最低,仅为572.83 kg/hm^2;种子产量较高的是5 cm株距处理,为1050.20 kg/hm^2,30 cm株距处理次之,为1002.15 kg/hm^2;种子发芽率最高的是5、15 cm株距处理,均为91.33%。苜蓿种子产量与分枝数、单序荚果数、单荚种子数、种子千粒重等显著正相关,相关系数分别为0.54、0.523、0.474、0.507。综合分析认为,苜蓿种子产量构成因子受密度的影响比较明显,适宜的高/低密度均能够提高苜蓿种子产量,但密度影响种子产量及其构成因子的贡献率。The paper aims to study the effect of reproductive pattern under different densities of alfalfa. Afield trail was conducted by setting up plant spacing of 5, 10, 15, 20, 25, 30 cm with row spacing of 30 cmunder drip irrigation condition. Experimental data showed that there was obvious influence of differentdensities on pod rate and seed yield. The pod rate of 10 cm was higher than that of others, up to 59.66%, butthe seed yield was the lowest, only 572.83 kg/hm^2. The seed yield of 5 cm was higher than that of others, up to 1050.20 kg/hm^2, the next was 30 cm, 1002.15 kg/hm^2. The seed germination rate of both 5 cm and 15 cm was91.33%, which was higher that of other treatments. Branches, pod number per inflorescence, seed number perpod, 1000-grain weight were more positively correlated with seed yield of alfalfa, with correlation coefficientsof 0.54, 0.523, 0.474, 0.507, respectively. Therefore, the density has significant effect on seed yieldcomponents, the properly high or low density can increase the seed yield, but the density has influence on seedyield and its components’ contribution rate.

关 键 词：苜蓿 密度 结荚率 种子产量 

分 类 号：S541.706[农业科学—作物学]