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以磷酸二铵、控释肥、复合肥、尿素及硫酸钾为研究材料,采用组成养分含量相同的常规施肥和2种一次性施肥方法,研究不同施肥条件下大豆群体生长及养分吸收规律。结果表明,不同施肥方法中常规施肥能较好地稳定有效分枝数、荚数、粒数和单株粒重,适合在高密度种植时施用,赤豆3号和抗线7号产量分别在3 600和3 260kg/hm2以上时,每生产100kg子粒需N:5.07~5.82kg、P2O5:0.92~0.96kg、K2O:1.07~1.58kg;控释肥处理对叶面积指数、株高和底荚高度稳定性较好,适宜在低密度种植时施用,两品种产量分别在3 694和3 260kg/hm2以上时,每生产100kg子粒需N:6.69~7.06kg、P2O5:1.13~1.25kg、K2O:1.52~1.77kg。
Taking diammonium phosphate, controlled release fertilizer, compound fertilizer, urea and potassium sulfate as materials, the regular fertilization and two kinds of single fertilization methods were used to study the growth and nutrient uptake of soybean under different fertilization conditions. The results showed that the conventional fertilization method could effectively stabilize the effective number of branches, pods, grain number and grain weight per plant, and was suitable for high-density planting. The yield of adzuki bean 3 and line 7 was 3 600 and 3 260kg / hm2 or more, the production of 100kg seeds required N: 5.07-5.82kg, P2O5: 0.92-0.96kg and K2O: 1.07-1.58kg. Controlled-release fertilizer had no significant effect on leaf area index, plant height and bottom pod Highly stable, suitable for low-density planting, when the yield of two varieties is more than 3 694 and more than 3 260kg / hm2 respectively, the production of 100kg grain requires N: 6.69-7.06kg, P2O5: 1.13-1.25kg, K2O: 1.52 ~ 1.77kg.