First, do not apply a large amount of nitrogen fertilizer. The fertilizer requirement of watermelon is mainly nitrogen nutrition before sitting on the melon. 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 peaked. At the maturity 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 growth. The peak period is 3.5:1:4.6.
Second, do not apply chlorine-containing fertilizers. Watermelon belongs to the avoidance of chlorine crops. The application of chlorine-containing fertilizers (such as ammonium chloride, potassium chloride or potassium chloride type compound fertilizers) will affect the accumulation of sugar and make the taste of the melons lighter.
Third, do not apply too much human excrement. Excessive human excrement can easily cause the plant to grow long, making it difficult to sit on the melon, and the melon skin is thick and tastes sour.
Fourth, watermelon topdressing should pay attention to deep application. After the application, the soil is covered in time, especially the nitrogen fertilizer. If the surface is applied, the nitrogen is easily volatilized to produce ammonia gas, which damages the leaves and also reduces the fertilizer efficiency.
5. Avoid fertilizing in rainy weather. 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 the fertilizer, but also easily causes the watermelon to grow.
Six, pay attention to the fertilization site. Generally, it is about 10 cm away from the main root. It is too close to burn roots and affect plant growth.
Seven, avoid the topdressing in the drought. 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 penetrate outward, causing the plant to be physiologically dehydrated and die.
Huaxian Agricultural Technology Promotion Center Lu Shuguang
Second, do not apply chlorine-containing fertilizers. Watermelon belongs to the avoidance of chlorine crops. The application of chlorine-containing fertilizers (such as ammonium chloride, potassium chloride or potassium chloride type compound fertilizers) will affect the accumulation of sugar and make the taste of the melons lighter.
Third, do not apply too much human excrement. Excessive human excrement can easily cause the plant to grow long, making it difficult to sit on the melon, and the melon skin is thick and tastes sour.
Fourth, watermelon topdressing should pay attention to deep application. After the application, the soil is covered in time, especially the nitrogen fertilizer. If the surface is applied, the nitrogen is easily volatilized to produce ammonia gas, which damages the leaves and also reduces the fertilizer efficiency.
5. Avoid fertilizing in rainy weather. 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 the fertilizer, but also easily causes the watermelon to grow.
Six, pay attention to the fertilization site. Generally, it is about 10 cm away from the main root. It is too close to burn roots and affect plant growth.
Seven, avoid the topdressing in the drought. 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 penetrate outward, causing the plant to be physiologically dehydrated and die.
Huaxian Agricultural Technology Promotion Center Lu Shuguang
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