不同种植密度对饲用大豆品系15农艺性状及产量的影响

Effects of Different Planting Densities on Agronomic Traits and Yield of Feeding Soybean Strain 15

为探讨不同种植密度对饲用大豆品系15草产量、农艺性状及籽粒产量的影响,筛选出品系15在通辽产区的最佳种植密度,为品系15的栽培及生产提供理论依据,试验采用行距(A)和株距(B)双因素裂区设计,研究不同种植密度对品系15产量及农艺性状的影响。结果表明:种植密度对品系15的鲜草产量和干草产量均有显著影响,在种植密度(行距×株距)为60 cm×40 cm时,草产量最高。不同种植密度对品系15的农艺性状有显著影响,在种植密度为60 cm×30 cm时,品系15株高较高,分枝较多,主茎较粗,单株地上生物量较大。主茎粗和单株地上生物量与鲜草产量及干草产量呈极显著正相关关系。在种植密度为60 cm×30 cm时,品系15的单株粒重及籽粒产量最大。若品系15作为牧草应用,行距×株距为60 cm×40 cm是最佳的密度设置,若品系15作为籽实饲料或繁殖种子,行距×株距为60 cm×30 cm是最佳的密度设置。

In order to investigate the effects of different planting densities on the yield,agronomic traits and seed yield of feeding soybean,the best planting density of Strain 15 in Tongliao was screened to provide a theoretical basis for the cultivation and production of Strain 15.The test used the line spacing(A)and the plant spacing(B)two-factor splitting zone design and the effects of different planting densities on yield and agronomic traits of Strain 15 were studied.The results showed that planting density had a significant effect on fresh grass yield and dry yield of Strain 15,and grass yield was highest when planting density(Line distance×Plant distance)was 60 cm×40 cm.Different planting densities had significant effects on the agronomic traits of Strain 15.When the planting density was 60 cm×30 cm,the Strain 15 plant height were higher,the branches were more,the main stem was thicker,and the biomass above the single plant was larger.There was a significant positive correlation between the main stem diameter and the above ground biomass of fresh plants and fresh grass yield and dry yield.When the planting density was 60 cm×30 cm,the seed weight per plant and the seed yield of the Strain 15 were the largest.If the Strain 15 is used as grass,the line distance×plant distance of 60 cm×40 cm is the best density setting.If the Strain 15 is used as feeding seed or breeding seed,the line distance×plant distance of 60 cm×30 cm is the best density setting.