不同种植密度下施加甲哌鎓对大豆产量及品质的影响

Effects of Mepiquat Chloride on Yield and Quality of Soybean Under Different Planting Density

为提高大豆产量,寻找适宜种植密度与探究甲哌鎓对大豆产量的调控效应,选用来豆2号大豆品种,设置保苗密度为20.0万株·h m^(-2)(D20.0)、22.5万株·hm^(-2)(D22.5)和25.0万株·hm^(-2)(D25.0),在大豆始荚期喷施甲哌鎓,研究了不同密度下喷施甲哌鎓对大豆产量及品质的影响。结果表明,D22.5+DPC和D25.0+DPC处理株高较相应对照组显著降低;D25.0+DPC处理单株有效荚数较对照组增加、单株粒数和百粒重较对照组显著增加;D20.0+DPC、D22.5+DPC和D25.0+DPC产量均较相应对照组显著增加,脂肪含量增加0.19%~0.67%,以保苗密度25.0万株·hm^(-2)时喷施甲哌鎓的增产效果最佳。

In order to improve the yield of soybean,find the suitable planting density and explore the regulation effect of mepiquat chloride on the yield of soybean,the soybean variety Laidou 2 was selected,and the seedling density was set as 2.00×10^(5) plants·ha^(-1)(D20.0),2.25×10^(5) plants·ha^(-1)(D22.5)and 2.50×10^(5) plants·ha^(-1)(D25.0).The effect of spraying mepiquat chloride on the yield and quality of soybean under different densities was studied.The results showed that the plant height of D22.5+DPC and D25.0+DPC treatment was significantly lower than that of the corresponding control group.The number of effective pods per plant in D25.0+DPC treatment increased compared with the control group,and the number of grains per plant and 100-seed weight increased significantly compared with the control group.The yields of D20.0+DPC,D22.5+DPC and D25.0+DPC were significantly higher than those of the corresponding control groups,and the fat content increased by 0.19%-0.67%.The yield-increasing effect of spraying mepiquat chloride was the best when the seedling density was 2.50×10^(5) plants·ha^(-1).