Taboo 1: a single application of a large number of nitrogen fertilizer watermelon fertilization is the most attention with nitrogen, phosphorus, potassium, if a single application of a large number of nitrogen fertilizer, the plant is extremely easy and long, is not conducive to flowering melon and fruit development. According to the study, watermelon is mainly composed of nitrogen nutrition before sitting on melon, and the absorption of potassium is increased sharply after sitting on melon; the nitrogen and potassium levels are basically equal in the hair removal stage of melon, and the absorption reaches the peak in melon stage, and the melon matures. The absorption of nitrogen and potassium was significantly reduced during the stage, and the absorption of phosphorus was relatively increased; the ratio of nitrogen, phosphorus, and potassium was 3.8:1:2.8 for the seedling period, 3.6:1:1.7 for the extension period, and the period of melon growth was high. It is 3.5:1:4.6.
Contraindications II: Applying chlorine-containing fertilizers Watermelon is a chlorine-inhibiting crop. Applying chlorine-containing fertilizers (such as ammonium chloride, potassium chloride, etc.) will affect the accumulation of sugar and make melons lighter.
Taboo 3: Excessive application of human excreta Application of excessive human excreta can easily lead to plant growth, making it difficult to sit melon, melon skin thick and taste sour.
Contraindication IV: In topsoil fertilization of watermelon, pay attention to the deep application of fertilizer, and timely cover the soil after application, especially nitrogen fertilizer. If nitrogen is applied, nitrogen can be easily volatilized to produce ammonia gas and harm the leaves, and at the same time, the fertilizer efficiency is reduced.
Taboo 5: Overcast and rainy weather Fertilizer Rainy weather Humid air and high soil moisture. Fertilizer is not only easy to lose fertilizer, but also easily cause watermelon to grow.
Taboo 6: The fertilization site is too close to the root. The fertilization site of watermelon is generally required to be about 10 centimeters from the main root; it is easy to burn roots if it is too close, which affects plant growth.
Taboo 7: When the dry weather is topdressing with drought, soil moisture content is low. Applying chemical fertilizer at this time will make the cytoplasmic solution of the root cells penetrate outward, causing the plants to die physiologically.
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