Watermelon fertilization has regular before and late different
Watermelon is a high-yielding, economic crop that is high in temperature, cold, and requires more fertilizer. In general, nitrogen fertilizer is the basis for high quality and high yield of watermelon. Adequate phosphate fertilizer can promote plant growth and development, promote flower bud differentiation, make it early flowering, early melon, and early maturing, and potassium is a catalyst for various enzymes in plants. Can promote photosynthesis, protein synthesis, increase of sugar, improve the quality of melon and so on. Therefore, to obtain high quality and high yield of watermelon, scientific fertilization is the key.
The general principle of fertilization of watermelon: Reapply organic fertilizer, appropriate application of nitrogen fertilizer, stable application of phosphate fertilizer, increase potassium fertilizer, combined application of three elements of nitrogen, phosphorus and potassium, and appropriate amount of trace element fertilizer.
In general, the absorption of nutrients in watermelon is low in the early period, more in the medium term and less in the later period. The total absorption of N, P and K in the seedling stage accounted for 0.18%-0.25% of the whole growth period; the stems and leaves of the seedlings grew rapidly, and the absorption of N, P, and K also increased, and the absorption accounted for 20% of the whole growth period. 30%; After sitting on melons, the absorption of N, P and K reached the highest peak of the whole growth period during the expansion stage of melons, which accounted for 65% to 75% of the whole growth period; the total amount of nutrient absorption during the mature period accounted for 5% of the whole growing period. 10%.
Therefore, when fertilizing, pay attention to the different needs of different stages of watermelon growth:
1 Early stage: topdressing nitrogen fertilizer and supplying sufficient nitrogen fertilizer to ensure and promote vegetative growth.
2 mid-term: should pay attention to the appropriate application of phosphate fertilizer.
3 Late: The main application of potassium fertilizer is to promote the improvement of fruit yield and quality.
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