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Two bogey application of chlorine-containing fertilizers Watermelon is a chlorine-free crop. The application of chlorine-containing fertilizers (such as ammonium chloride, potassium chloride, etc.) will affect the accumulation of sugar and make the taste of the melons lighter.
Excessive application of human excrement in three bogey. Excessive human excrement is easy to cause the plant to grow long, making it difficult to sit on the melon, and the melon skin is thick and tastes sour.
Four bogey in the topsoil fertilization watermelon topdressing should pay attention to deep application, timely application of soil after application, especially nitrogen fertilizer, if applied, nitrogen is easy to volatilize to produce ammonia, harming the leaves, but also reduce fertilizer efficiency.
Five bogey rainy weather fertilization In the rainy weather, the air humidity is high, and the soil moisture content is high. At this time, fertilization is not only easy to lose fertilizer, but also easily cause watermelon to grow.
Six bogey fertilization sites are too close to the roots. The fertilization site of watermelon is generally about 10 cm away from the main root; it is too close to burn roots and affect plant growth.
When the seven bogey drought occurs, the weather is dry and the soil moisture content is low. At this time, the application of chemical fertilizer will cause the cytoplasmic solution of the root cells to permeate outward, causing the plant to be physiologically dehydrated and die.
Watermelon is fertile and fertilized
One should not apply a large amount of nitrogen fertilizer. Watermelon fertilization is most concerned with nitrogen, phosphorus and potassium. If a large amount of nitrogen fertilizer is applied alone, the plant is very easy to grow, which is not conducive to flowering and melon development. According to the research, the watermelon is mainly based on nitrogen nutrition before the melon is eaten. The absorption of potassium after the melon is increased sharply; the amount of nitrogen and potassium in the depilation stage of the melon is basically equal, and the absorption of the melon is at the peak, the ripening of the melon At the stage, the absorption of nitrogen and potassium decreased significantly, and the absorption of phosphorus increased relatively. The ratio of nitrogen, phosphorus and potassium should be 3.8:1:2.8 for seedling stage and 3.6:1:1.7 for vine growing period. It is 3.5:1:4.6.
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