水溶性叶面肥对豇豆产量的影响

使用8个不同配方叶面肥在豇豆营养生长阶段喷施3次，调查叶面肥对豇豆产量的影响。结果表明，与对照相比，喷施4.3%黄腐酸叶面肥处理增产67.0%；8%黄腐酸＋氮磷钾增产57.1%；大量元素＋微量元素（N＋P2O5＋K2O≥23%9∶6∶8）＋（F e＋B＋Z n≥1%）]的增产48.2%；4%腐植酸钾＋大量元素＋微量元素（N＋P2O5＋K2O≥23%9∶6∶8）＋（Fe＋B＋Zn≥1%）]增产43.2%（添加腐植酸钾不利于提高产量）；3%腐植酸钾＋维生素＋尿素＋硫酸钾≥7%增产40.8%；大量元素＋微量元素（N＋P2O5＋K2O≥35%12∶10∶13）＋（F e＋B＋Z n≥0.6%）]增产39.5%；3%腐植酸钾＋大量元素＋微量元素（N＋P2O5＋K2O≥35%12∶10∶13）＋（F e＋B＋Z n≥0.6%）]增产33.7%；4%腐植酸钾增产15.9%。黄腐酸增产效果最明显，微量元素增产效果比大量元素明显，腐植酸钾增产幅度较低，腐植酸钾＋大量元素＋微量元素处理的增产效果低于大量元素＋微量元素处理。

Effect of Water Soluble Foliar Fertilizer on Cowpea Yield

To investigate the effects of foliar fertilizer on the yield of cowpea, eight different foliar fertilizers were sprayed in cowpea vegetative growth stage for 3 times. Results showed that the yield increased 67%by spraying 4.3%fulvic acid foliar fertilizer, increased 57% by spraying 8% fulvic acid＋（N＋P2O5＋K2O）, increased 48.2% by spraying major elements and trace elements（N＋P2O5＋K2O≥23% 9∶6∶8）＋（Fe＋B＋Z≥1%）], increased 43.2% by spraying 4%potassium humate＋major elements＋trace elements（N＋P2O5＋K2O≥23% 9∶6∶8）＋（Fe＋B＋Zn≥1%）], increased 40.8%by spraying 3% potassium humate＋vitamin＋carbamide urea＋potassium sulfate≥7%; increased 39.5% by spraying major elements＋tace elements（N＋P2O5＋K2O≥35% 12∶10∶13）＋（Fe＋B＋Zn≥0.6%）]; increased 33.7% by spraying 3%potassium humate＋major elements and trace elements （N＋P2O5＋K2O≥35% 12∶10∶13）＋（Fe＋B＋Zn≥0.6%）];increased 15.9%by spraying 4%potassium humate. The most obvious of yield increase was fulvic acid, the effect of trace elements was better than that of major elements, potassium humate was the lowest, potassium humate＋major elements＋trace elements was less than major elements＋trace elements.