Effects of Humic Acid Foliar Fertilizer on Yield and Quality of Broomcorn Millet
Using"Qishu No.1"in Heilongjiang province as the test material,the effects of different concentrations of humic acid foliar fertilizer(0,200,400,600,800 times liquid)on agronomic traits,yield factors,photosynthetic and quality indexes of broomcorn millet were studied through random design.The results showed that,the application of humic acid foliar fertilizer increased plant height,ear length,stem diameter,ear weight and grain weight per ear,and increased net photosynthetic rate,transpiration rate,contents of crude protein and crude starch in grain as well,though it reduced intercellular CO2 concentration of broomcorn millet.The application of humic acid foliar fertilizer 600 times liquid was the most significant.Compared to the control,the above indexes were increased by 4.3%,12.7%,9.4%,8.5%,10.8%,14.2%,26.5%,4.5%and 3.8%,respectively,and the intercellular CO2 concentration was decreased by 65.9 μmol/(m2·s),which then improved the quality and increase the yield.The yield of humic acid foliar fertilizer 600 times liquid was 5099.1 kg/hm2,which was 7.8%higher than that of the control.
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