If you want to grow watermelons with high yield, you must know what fertilizer to use and how much to use!

As one of the best fruits to relieve summer heat, watermelon has a wide planting area in our country, and high yield is one of the pursuits for growers. Do you know what kind of fertilizer and how much to use for that kind of watermelon?

I. the basic situation of watermelons

1. Watermelon producing area

Although watermelon is introduced from abroad, it has a wide cultivation area in our country, and there are many varieties. Watermelons are planted all over the north and south of our country, among which watermelons are the most famous in Xinjiang, Lanzhou, Gansu, Dezhou, Shandong and Liyang, Jiangsu.

two。 Planting prospect of watermelon

Watermelon is a kind of fruit that sells well in hot summer, and the weather is getting hotter and hotter due to climate change in recent years, especially in the south, so the market of watermelon is still very good. In addition, the input cost of watermelon is not big, and the time of ripening fruit is not long, so it is more suitable for planting.

3. Varieties of watermelon

At present, the better watermelon varieties are Little Angel Watermelon, Chunlei Watermelon, Jingxiu Watermelon, Kirin King Watermelon, Red Tiger Watermelon, Black King Watermelon and so on, among which Kirin King Watermelon and Red Tiger Watermelon are very precocious varieties. generally blossom 28 or so will be able to bear fruit on the market, while Red Tiger watermelon can be cultivated in spring and autumn with strong disease resistance.

What kind of fertilizer should be used to grow watermelons? How much do you use?

In addition to selecting suitable and high-yielding varieties for planting watermelon, the amount of fertilizer and amount applied is also one of the decisive factors for high yield.

(1) Fertilizer that can be applied to grow watermelons

1. Application of base fertilizer to watermelon

Base fertilizer is not only the basic nutrition supply of watermelon growth, but also one of the medicine means to improve soil nutrients, so when applying base fertilizer, one is to use rotten manure such as chickens, ducks, pigs, cattle and other manure, or to buy commercial organic fertilizer and cake fertilizer; the second is to apply a certain proportion of chemical fertilizer, mainly directly purchased compound fertilizer or diammonium hydrogen phosphate.

two。 Topdressing of watermelon

The application of flushing fertilizer or dilute manure water at the watermelon seedling stage is usually applied once every 7-10 times. If the watermelon seedlings grow well and flourish, they do not need to apply seedling fertilizer; watermelons begin to climb with liquid fertilizer, manure, urea, calcium superphosphate and potassium sulfate, which can be avoided for watermelon fields with sufficient base fertilizer and good growth; apply special fertilizer or manure, urea, calcium superphosphate and potassium sulfate during watermelon fruit expansion. In addition, some foliar fertilizer can be sprayed to promote growth during the fruit expansion period.

(2) the amount of fertilizer applied to watermelon planting

1. Generally, the fertilizer application rate of watermelon is determined by the target yield. for example, under the medium fertility condition in North China, when the target yield is 2500-3500 kg / mu, 20-30 kg of nitrogen (N), 8-12 kg of phosphorus (P2O5) and 30-40 kg of potassium (K2O) are required.

two。 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. In addition, the demand ratio of nitrogen, phosphorus and potassium in watermelon is about 3 ∶ 1 ∶ 4, and it absorbs the most potassium, followed by nitrogen and phosphorus during the whole growth period. Nitrogen fertilizer is the main fertilizer before setting melon, and the absorption of potassium increases sharply after setting melon; the absorption of nitrogen and potassium decreases obviously in the mature stage, while the absorption of phosphorus increases relatively; the amount of nitrogen and potassium absorbed in the depilation stage is basically the same.

The above is the soil flow network editor of the watermelon cultivation need to use fertilizer and fertilizer amount of all the introduction, the majority of melon farmers can refer to.