氮、磷、钾配施及其与钼、硼配施对大豆产量的影响

Effect of N, P, K Combined Application and N, P, K, Bor Mo Combined Application on Yield of Soybean

采用田间小区试验,研究浙春3号大豆在不同的氮、磷、钾配施及其与钼或硼配施条件下产量构成因子的变化及各因子之间的相关性。结果表明,氮、磷、钾与硼或钼配施促进了大豆株高的增长,增加了大豆的百粒重、总荚数和单株籽粒重,提高了大豆的产量;大豆产量与大豆植株的生物量、株高、单株籽粒重、百粒重和总荚数达到显著的正相关,与经济系数及有效分枝数为负相关,氮、磷、钾与硼或钼配施主要通过大幅度提高生物学产量而最终提高籽粒产量;在试验土壤条件下,氮、磷、钾之间的配施比以2∶1∶1处理的大豆产量最高;氮、磷、钾对大豆产量影响大小的顺序为N>K>P。

By methods of field trials, the changes of yield characteristics and the relationship between yield characteristics of different N, P, K combined application and N,P,K,B or Mo combined application of Zhechun No3 soybean have been studied. The results are shown as follows: compared with the experiments of N, P, K combined application, plants height are strikingly raised, 100seeds weight, No. of total pods and seed weight per plant are obviously increased and yields of soybean are greatly improved in the experiments of N, P, K, B or Mo combined application. There are very significant positive correlations between yields of soybean and plants height, seed weight per plant, biomass, 100seeds weight and No of total pods of soybean and negative correlations between yields of soybean and No. of valid branches and economic index. Yields of soybean seeds are mostly improved through the way of increasing biomass in the experiments of N, P, K , B or Mo combined application. Yields of soybean by the treatment of N∶P2O5∶K2O＝2∶1∶1 are the highest in the different N, P, K combined applications in this experimental soil. The effect of N, P and K on yields of soybean is in the order of N＞P＞K.