Construction of Quantitative Sowing and Fertilization Model for High Oil and High Yield Soybean
In order to fully understand the effects of soybean sowing and fertilization methods on soybean yield and oil content,scientific technical measures to improve quality and increase production were mastered,in this study,soybean variety with high oil and high yield,Heinong 531,was used as the material,the single-factor gradient experiments of sowing density,fertilization depth and fertilization amount were set up to analyze the effects of single factor indexes on yield components and oil content.The quadratic regression orthogonal experimental design was used to establish a mathematical model of the integrated measures of soybean sowing and fertilization with yield and oil content as indicators,and the combination of precise implementation measures under the highest yield and highest oil content was clarified.The results showed that pods number per plant and seeds number per plant increased first and then decreased with the increase of seeding density,and the critical value was 280 000 plants·ha-1.Pods number per plant and seeds number per plant showed a gradual increase trend with the increase of fertilization depth,the change of 100-seed weight showed a parabolic shape with the increase of fertilization depth.The pods number per plant,the seeds number per plant and the 100-seed weight all showed an increasing trend with the increase of fertilizer application rate,and the critical value was 375 kg·ha-1.Soybean oil content increased first and then decreased with the increase of seeding density,the deepening of fertilization layer and the increase of fertilizer amount.There was no significant difference in oil content among different seeding density treatments.Both shallow fertilization and increasing fertilizer amount could significantly increase soybean oil content.The regression equation between soybean yield,seeding density(X1),fertilization depth(X2)and fertilization quantity(X3)was obtained as follows:Y=2 714.696+47.445X,+15.768X2+2.967X3-0.490 8X21-1.862X22-0.001 2X23+0.680 9X1 × X2-0.078 3X1 × X3-0.005 9X2 × X3.The regression equation between soybean oil content and sowing density,fertilization depth and fertilizer amount is as follows:Y=14.288+0.410X1+0.083X2+0.014 6X3-0.006 47X21-0.010 8X22-0.000 008 17X23+0.004 86X1 ×X2-0.000 316X1 ×X3-0.000 069 1X2 ×X3.The model predicted that the highest yield of high-oil and high-yield soybean could reach 3 952.023 kg·ha-1,and the sowing density was 280 000 plants·ha-1,the fertilization depth was 10 cm,and the fertilizer application amount was 225.080 5 kg·ha-1.The maximum oil content can reach 22.79％,and the sowing density is 260 000 plants·ha-1,the fertilization depth is 8.5 cm,and the fertilizer amount is 354.857 8 kg·ha-1 to achieve the maximum oil content.The results provide theoretical basis and technical support for promoting high oil and high yield soybean production.
万方数据
维普
