叶面喷施黄腐酸钾对夏玉米产量的影响

试验以丰利德1号玉米为试材,研究叶面喷施不同浓度的黄腐酸钾对夏玉米产量的影响。结果表明,黄腐酸钾喷施浓度低于133 mg/L时随喷施浓度的增加,穗粒数、千粒重、产量均表现出逐渐增加的趋势;大于133 mg/L时随浓度的增加,夏玉米株高表现出先增后减的趋势,穗粒数、千粒重、产量均表现出逐渐降低的趋势。以喷施200 mg/L黄腐酸钾处理的夏玉米株高最大,为2.21 m,与对照达极显著差异;穗粒数以67 mg/L黄腐酸钾处理最高,为542.7粒;千粒重、产量均以喷施133 mg/L黄腐酸钾的处理最高,分别为303.2 g、8 771.3 kg/hm2,分别比对照提高7.2%、12.8%,达到极显著差异。因此,夏玉米7叶期喷施黄腐酸钾的最佳浓度为133 mg/L。

Effect of Foliage Application of Fulvic Acid Potassium on Yield of Summer Maize

With Fenglide 1 as material , the effect of foliage application of fulvic acid potassium on sum-mer maize yield was studied .The results showed that the grain number per spike , 1 000-grain weight and yield of maize increased gradually with the increase of fulvic acid potassium concentration when lower than 133 mg/L;but they showed opposite trend , and plant height increased firstly and then decreased at the concentra-tion higher than 133 mg/L.The plant height of summer maize was the highest as 2.21 m at the concentration of 200 mg/L, which was significantly higher than that of CK .The grain number per spike was the most as 542 .7 at the concentration of 67 mg/L; 1 000 -grain weight and yield were the highest as 303 .2 g and 8 771.3 kg/hm2 respectively at the concentration of 133 mg/L, which increased by 7.2% and 12.8% re-spectively compared to CK .In conclusion , the best spraying concentration of fulvic acid potassium was 133 mg/L at 7-leaf stage of summer maize .