Watermelons are hi-fertilizer crops and have a short growth period, but they require large amounts of fertilizer. The potassium uptake occurs during the whole growth period, followed by nitrogen and phosphorus. The absorption of N, P and K in different growth stages of watermelon is different.
Fertility requirements
1. Seedling stage watermelon from true lobe to 5 true leaf stage (planting period), about 30 days, this period of small vegetative growth, less absorption of nitrogen, phosphorus and potassium, slow absorption phase for the fertilizer.
2. Extension of vines from the "cluster tree" to the opening of the first female flower, takes about 15-20 days, watermelon stretches rapidly between the internodes, the leaf area increases, the roots are basically formed, the absorption capacity is enhanced, and the gradual absorption stage of the fertilizer Absorb more nitrogen, less potassium and less phosphorus.
3, flowering results from the first fruiting period of female flowers open to fruit ripening, about 30-40 days, this period is the vegetative and reproductive growth of watermelon at the same time vigorously and mainly from vegetative growth to reproductive growth mainly for fertilizer The fast-absorption stage is the period of peak fertilizer requirement for watermelons. The absorption of N, P, and K accounts for about 85% of the total, of which the absorption during the expansion period is the highest, accounting for about 75%, and the absorption of potassium is the most during flowering.
Cycas Plant,Cycas Revoluta,Natural Cycas Revoluta,Cycas Tree
fanhua nursery , https://www.fanhuanursery.com