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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)+(Fe+B+Zn≥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)+(Fe+B+Zn≥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)+(Fe+B+Zn≥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。
Eight different formula foliar sprays were applied three times during the vegetative growth phase of cowpea to investigate the effect of foliar fertilizer on cowpea yield. The results showed that compared with the control, foliar application of 4.3% fulvic acid increased the yield by 67.0%, that of 8% fulvic acid + NPK increased 57.1%, and the contents of trace elements and trace elements [(N + P2O5 + K2O≥23 (9 +6: 8) + (Fe + B + Zn≥1%)] increased 48.2%; 4% humic acid potassium + macronutrients + trace elements [(N + P2O5 + K2O≥23% 9: 6: 8 ) + (Fe + B + Zn≥1%)] yield 43.2% (addition of potassium humate is not conducive to increase yield); 3% humic acid potassium + vitamins + urea + potassium sulfate ≥7% yield 40.8% (N + P2O5 + K2O≥35% 12:10:13) + (Fe + B + Zn≥0.6%)] increased 39.5%; 3% humic acid potassium + macronutrient + trace element [(N + P2O5 + K2O≥35% 12:10:13) + (Fe + B + Zn≥0.6%)] increased yield 33.7%; 4% potassium humate increased yield 15.9%. Fulvic acid production was the most obvious. The yield increase of trace elements was more obvious than that of a large number of elements. The yield of potassium humate was lower. The yield increase of potassium humate + macronutrients + trace elements was lower than that of a lot of elements + trace elements.