"five increases and five taboos" should be achieved in fertilizing watermelon.

Watermelon is a necessary summer fruit in summer. How to make watermelons sweet and refreshing is what every melon farmer strives for. If watermelons are to grow well, fertilizing must be done well. In order to improve the yield and quality of watermelon, "five increases and five taboos" must be achieved in fertilization.

First, increase the application of organic fertilizer, do not apply chemical fertilizer alone

Before sowing or transplanting watermelons, combined with land preparation every 667 square meters, apply fully mature high-quality organic fertilizer 3000mur4000 kg and mature cake fertilizer 80mur100kg. In the watermelon extension period, the melon sitting period according to the growth trend per mu of rotten human feces and urine or biogas fertilizer 100ml 150kg. In order to improve the growth of watermelon, enhance the ability of stress resistance, increase yield and improve quality. Do not apply chemical fertilizer alone, chemical fertilizer can only be used as supplementary fertilizer in watermelon field, and must not be applied in large quantities, so as not to reduce the sugar content and deteriorate the quality of watermelon.

Second, increase the application of potash fertilizer and avoid excessive application of nitrogen fertilizer

The application of potassium fertilizer is closely related to the metabolism, synthesis, transportation and transformation of carbohydrates in watermelon. It can improve the assimilation efficiency of watermelon plants, enhance the ability of drought and disease resistance, improve fruit quality and increase fruit sugar content. Generally, 8 kg potash fertilizer (no nitrogen) is used as base fertilizer for every 667 square meters, and 4-5 kg potash fertilizer is applied for every 667 square meters during melon setting period, which can significantly improve the yield and sweetness of watermelon. Do not apply a single excessive amount of nitrogen fertilizer, according to the experiment, watermelon is mainly nitrogen nutrition before sitting melon, and potassium absorption increases sharply after sitting melon. If excessive application of nitrogen fertilizer, it is easy to cause overgrowth of vine leaves, delay flowering, and even can not blossom and bear fruit, and disease resistance is weakened, watermelon sweetness is reduced.

Third, increase the application of boron fertilizer, do not apply chlorine fertilizer

The appropriate amount of boron fertilizer applied to watermelon can not only effectively prevent the melon skin from being too thick and hollow, but also increase production, thin skin and sweet meat. Do not apply chlorine-containing fertilizer, watermelon belongs to chlorine-free crops, the application of chlorine-containing fertilizer, will affect the accumulation of sugar, so that watermelon fruit taste, commercial deterioration.

Fourth, increase the application of cake fertilizer, do not use too much human feces and urine

When the watermelon is the size of an egg, dig a hole 10 cm away from the main root, apply 50 grams of fully fermented and mature cake fertilizer and 2 grams of boron fertilizer, seal the soil and water it. Do not apply too much human feces and urine, too much, easy to cause overgrowth of plants, difficult to sit melon, thick peel, sour flesh, poor marketing.

Fifth, increase the spraying of leaf fertilizer, do not apply fertilizer too shallow and too close

Spraying 0.5% potassium dihydrogen phosphate solution on the leaves of watermelon during vine extension and fruit expansion, spraying 50 kg every 667 square meters, once every 7 days, three times in a row can improve sweetness. Spraying 0.1% Mel 0.2% borax solution twice before flowering and when the watermelon begins to expand can increase the yield and sweetness of the watermelon. Avoid watermelon topdressing can not be too shallow and too close, topdressing is too shallow, nitrogen is easy to volatilize, harm leaves, but also reduce fertilizer efficiency. The depth of topdressing must be more than 10 cm and be covered with soil. Topdressing of watermelon is generally required to be about 10 cm away from the main root. If you are too close, it is easy to burn roots and affect plant growth.

The above is Tuliu.com 's introduction to the fertilization method of "five increases and five taboos" for watermelons. Farmers who grow watermelons can learn from this article as a reference. I hope everyone can achieve these five points in fertilization skills to ensure the yield of watermelons.