How to formulate and fertilize watermelon

The so-called formula fertilization is based on the crop fertilizer requirements, soil fertility performance and fertilizer yield increase effect. Under the conditions of organic fertilizer, the appropriate ratio of nitrogen, phosphorus, potassium and trace elements is proposed before the birth, and the corresponding Fertilization techniques and a fertilization measure. It can be seen that in order to do a good job of formula fertilization, we must first understand the content and supply of various elements in the soil; secondly, we must understand the fertilizer requirements of the cultivated crops, the amount of fertilizer required and the absorption ratio of each element; The content of the active ingredients of the fertilizer applied and the amount of nutrients absorbed by the different yields from the soil, and the amount of soil nutrients lost each year.

The formula fertilization of watermelon is a formula fertilization specially formulated for watermelon cultivation according to the characteristics of the fertilizer required for watermelon, the state of fertilization of the local soil, and the type of fertilizer applied. It can be seen that different environmental conditions and different soil fertility fertilization formulas are different. Now taking medium fertility, fertilizer leaching amount of 25% and 4,000 kg per mu as an example, the formula is as follows: 4000 kg of high-quality ring fertilizer per acre, 50-100 kg of cake fertilizer (or 1000 kg of chicken manure), 35 kg of urea, Calcium phosphate 45 ~ 50 kg, potassium sulfate 38 kg, foliar spray and micro-fertilizer 2 to 3 times to supplement the needs of trace elements.

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