Detailed explanation of eight taboo points for fertilization of watermelon

Due to the short growth cycle and large growth, watermelon has a large demand for fertilizer. However, if you do not pay attention to fertilization, it is also prone to difficulties in sitting melons, abnormal appearance, poor taste, low yield and other problems. Here are eight taboo points of watermelon fertilization for your reference.

First, watermelon fertilization taboo does not understand the principle

The general principle of fertilization for watermelon is to re-apply organic fertilizer, appropriate amount of nitrogen fertilizer, stable application of phosphorus fertilizer, increased application of potassium fertilizer, combined application of nitrogen, phosphorus and potassium, and appropriate supplementary application of medium and trace elements fertilizer.

Watermelons avoid fertilizing on rainy days

High humidity in overcast and rainy weather, high soil water content, easy loss of fertilizer, long vine leaves, tender and crisp leaves, easy to induce diseases and insect pests.

Third, watermelons avoid fertilization during drought

Fertilization during soil drought will make the root cytoplasmic aqueous solution permeate outward, causing the cytoplasmic wall to separate, resulting in physiological dehydration and withering of watermelon vine leaves, until the plant dies. Therefore, in the case of dry weather and low soil water content, we should first irrigate or water, make the soil moist and then fertilize.

Fourth, watermelon fertilizer is too close to the root.

Fertilization with the extension of melon vines, the root system will gradually expand, if near the root fertilization, fertilizer not only can not be fully absorbed and utilized, but also the phenomenon of root burning will occur. Therefore, fertilization should be gradually applied far away from the plant according to the elongation of melon vines, so as to facilitate the absorption of watermelon roots. It is generally required to be about 15 centimeters away from the main root.

Avoid applying chlorine-containing fertilizer to watermelons

Topdressing of watermelon should not be applied with chlorine-containing chemical fertilizers, such as ammonium chloride, potassium chloride and so on. The application of chlorine-containing fertilizer will affect the accumulation of sugar and lighten the taste of melon.

6. fertilization in topsoil is prohibited for watermelons.

The temperature is high in summer and there are many thundershowers. If fertilizer is applied in the topsoil, not only nutrients are easily evaporated, but also Rain Water is drenched and lost. Fertilization should be applied deeply between the two plants and then covered with soil to improve fertilizer efficiency.

7. Watermelons do not apply large amounts of nitrogen fertilizer alone

The fertilization of watermelon pays most attention to the combination of nitrogen, phosphorus and potassium. If a large amount of nitrogen fertilizer is applied alone, the plant is easy to grow, which is not conducive to flowering and fruit development. According to the study, the nitrogen nutrition of watermelon is mainly before setting melon, and the absorption of potassium increases sharply after setting melon; in the depilation stage of melon, the amount of nitrogen and potassium is basically the same, the absorption of nitrogen and potassium reaches the peak in the expansion stage, and the absorption of nitrogen and potassium decreases obviously in the ripening stage of watermelon, and the absorption of phosphorus increases relatively. The proportion of nitrogen, phosphorus and potassium should be 3.8, 3.6 and 4.6 in seedling stage, vine stage and melon growing stage respectively.

8. Watermelons avoid excessive use of human feces and urine

The application of too much human feces and urine can easily cause the plant to grow, making it difficult to sit on the melon, and the melon skin is thick and sour.