Effects of Humic Acid Compound Fertilizer on the Yield and Quality of Water Spinach
The effects of applying humic acid compound fertilizer on the yield and quality of water spinach were studied based on field experiments.The results showed that,compared with the common compound fertilizer,the treatment with humic acid compound fertilizer under the same conditions of nitrogen,phosphorus and potassium nutrients could significantly increase the yield and quality of water spinach,with an increase of 328.7 kg/667 m2 in yield and a yield increase rate of 7.03％,the nitrate content was reduced by 17.25％,the vitamin C content was increased by 12.71％,the soluble sugar content was increased by 9.80％,the production-to-investment ratio was 3.97:1,and the economic benefits were significant.
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