不同时期喷施叶面肥对高蛋白大豆生长性状及增产效果的影响

Effects of Foliar Fertilizer on Growth and Yield of High Protein Soybean at Different Stages

为明确高蛋白大豆喷施叶面肥的最佳时期及次数,以冀豆12和叶面肥磷酸二氢钾为试验材料,进行了叶面肥喷施时期及次数试验。结果表明,与清水对照相比,叶面肥处理后,大豆株高增加幅度为9.16%~14.20%,根长增加幅度为2.94%~15.57%,分枝数增加1.50~1.98个,单株荚数增加幅度为11.56%~40.60%;根干重增加幅度为4.43%~48.34%,茎干重增加幅度为2.05%~44.55%,豆荚干重增加幅度为4.96%~42.81%,植株总干重增加幅度为4.38%~43.42%;百粒重增加幅度为2.89%~9.42%,增产幅度为6.46%~23.11%。在关键期盛花期和结荚期各喷施磷酸二氢钾叶面肥一次,可显著增加大豆农艺性状、干重及产量。

The experiment of foliar fertilizer spraying period and times was carried out,and Jidou 12 and foliar fertilizer were taken as materials,aiming to determine the best period and times of foliar fertilizer spraying for high protein soybean.The results showed that the plant height,root length,branch number and pod number increased by 9.16%-14.20%,2.94%-15.57%,1.50-1.98 and 11.56%-40.60%,respectively.The dry weight of root,stem,pod and plant increased by 4.43%-48.34%,2.05%-44.55%,4.96%-42.81%and 4.38%-43.42%respectively.100-grain weight increased by 2.89%-9.42%,and the yield increased by 6.46%-23.11%.The agronomic traits,dry weight and yield of soybean were significantly increased by applying monopotassium phosphate fertilizer once at the critical stage of flowering and pod-setting.