A single application of a large amount of nitrogen fertilizer According to the study, the watermelon is mainly based on nitrogen nutrition before sitting on the melon, and 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 amount of the melon is expanded. At the peak, the nitrogen and potassium uptake of the melon is significantly reduced, and the phosphorus uptake is relatively increased. The ratio of nitrogen, phosphorus and potassium should be 3.8:1:2.8 for the seedling stage and 3.6:1 for the emergence period. 1.7, the growth period of the melon is 3.5:1:4.6.
The application of chlorine-containing fertilizers to watermelons 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 and application of human excrement is too much, which tends 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 of watermelon 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 rainy weather, high air humidity, high soil water content, fertilization at this time, not only easy to lose fertilizer, but also easy to cause watermelon grow.
Six bogey fertilization sites are too close to the roots of the fertilization site of watermelon, generally required to be about 10 cm from the main root; too close to easily burn roots, affecting plant growth.
When the seven taboos are dry, the topdressing 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 plants to be physiologically dehydrated and die.
The application of chlorine-containing fertilizers to watermelons 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 and application of human excrement is too much, which tends 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 of watermelon 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 rainy weather, high air humidity, high soil water content, fertilization at this time, not only easy to lose fertilizer, but also easy to cause watermelon grow.
Six bogey fertilization sites are too close to the roots of the fertilization site of watermelon, generally required to be about 10 cm from the main root; too close to easily burn roots, affecting plant growth.
When the seven taboos are dry, the topdressing 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 plants to be physiologically dehydrated and die.
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