Fertilization accounts for a large proportion of yield increase, with sufficient base fertilizer and timely topdressing, which promotes watermelon expansion, sweetening and ripening. How do watermelons generally fertilize? What water-soluble fertilizer is good for fruit swelling?
How do watermelons generally fertilize?
1. What fertilizer does watermelon need? Watermelon is a fertilizer-loving crop with short growth period, but it needs a large amount of fertilizer. During the whole growth period, potassium was absorbed the most, followed by nitrogen and phosphorus the least. According to the experiment, every 1000 kg of watermelon fruit needs 2.5-3.2 kg of nitrogen, 0.8- 1.2 kg of phosphorus and 2.2 kg of potassium.
2. Application of watermelon base fertilizer. Watermelon base fertilizer is also high-quality organic fertilizer, cake fertilizer, urea, calcium superphosphate, potassium sulfate, or ternary compound fertilizer, which is decomposed with traditional fertilizers such as farmyard manure and compound fertilizer and combined with deep ploughing. The specific fertilization amount can be determined according to the local soil fertility and yield level.
3. Watermelon topdressing
At seedling stage, whether watermelon seedlings need topdressing can be carried out according to whether the seedlings lack elements, such as weak growth and yellow leaves. At this time, topdressing water-soluble fertilizer can promote the rapid growth of seedlings.
Watermelon fertilization taboo
1. When fertilizing watermelon, be careful not to apply chlorine-containing fertilizer, because watermelon is a chlorine-free crop, and applying chlorine-containing fertilizer will affect the quality of watermelon.
2. Do not apply concentrated fertilizer during drought; The fertilization site should not be too close to the root, and the watermelon fertilization site should be washed at a distance of about 40 cm.
In the process of topdressing watermelon, attention should be paid to water solubility and component content, and interval fertilization should be adopted to quickly supplement the nutrients needed for watermelon growth.