Cucumber, bitter gourd, loofah, melon, pumpkin, zucchini and other melon vegetables are mostly suitable for growth on fertile, deep sandy soil or clay loam. At the same time, the demand for various nutrients in each stage of growth is very urgent. Therefore, according to their different fertilizer characteristics, ensuring fertilizer supply in each period is the key to achieving high yield of melon vegetables. Dicyandiamide Raw Material,High Purity Dicyandiamide,Dicyandiamide 99.5% Raw Materials,Dicyandiamide Industry Chemical Materials Beilite Chemical Co., Ltd. , https://www.dicyandiamideblt.com
Main melon vegetable fertilization technology
First, the characteristics of cucumber fertilizer and fertilization methods
The root system of cucumber is mainly distributed in the plough layer of 15-25 cm. The root system is weak and the absorption capacity is poor. It belongs to hi fertilizer, fertilizer and salt tolerance. It is not suitable to apply a large amount of chemical fertilizer at one time, while cucumber is suitable for nitrogen, phosphorus and potassium. The amount of nutrients required is large and the absorption rate is fast. Therefore, a large amount of organic fertilizer is the basis for high-yield cultivation of cucumber. Generally, 3000-4000 kg of organic fertilizer, which is mainly suitable for decomposing human and animal manure, should be applied per mu. The amount of topdressing of cucumber should not be too large, and the number of topdressing should be more. Master the principle of “less mealsâ€. In the initial stage of the melon, the first top dressing was applied, 8-10 kg of urea per acre and 5-8 kg of potassium sulfate. In the early stage of the melon, the second top dressing was carried out, and the interval between the top dressings in the melon period was shortened, combined with irrigation. The third previous top dressing was the same, and each time it was halved. Foliar application can be carried out with 0.5% urea and 0.3% potassium dihydrogen phosphate aqueous solution during the filling period.
Second, bitter melon needs fertilizer characteristics and fertilization methods
Bitter gourd is an annual climbing herb with more developed roots and more lateral roots. It has the characteristics of being resistant to fertilizer and not resistant to cockroaches. According to the characteristics of bitter gourd which is resistant to fertilizer and not resistant to cockroaches, it should be applied to the base fertilizer. Generally, 1500 kg of fermented pig manure and per mu, 30 kg of phosphate fertilizer, spring seedlings can be fertilized at the seedling stage, and summer bitter gourd should be opened from the cotyledon. Pay attention to the fattening. During the flowering period, 1-2 times of heavy fertilizer should be applied. Generally, 25 kg of cooked cake fertilizer per acre or 40 kg of high-efficiency organic compound fertilizer should be combined with the soil. After starting the melon or the first harvest, 75 kg of compound fertilizer will be fertilized per mu, and once every harvest will be followed by manure. At the peak of the period, superphosphate should be added once to extend the harvest period and promote the increase of yield and quality.
Third, loofah fertilizer characteristics and fertilization methods
The loofah grows fast, has many results, and is good for fertilizer, but the root system is shallow, the fertilizer and fertility are weak, and the soil is required to be loose and fertile, rich in organic matter. It has been determined that for every 1000 kg of loofah produced, 1.9-2.7 kg of nitrogen, 0.8-0.9 kg of phosphorus and 3.5-4.0 kg of potassium are taken from the soil. The amount of nitrogen uptake increased linearly within 30 days after colonization of loofah, and the highest amount of nitrogen was absorbed in the middle of growth. Entering the reproductive growth phase, the demand for phosphorus has increased dramatically, while the need for nitrogen has decreased slightly. Before the meloning period, the weight gain of each organ was slow, and the flow of nutrients was mainly roots and leaves, and provided nutrients for the development of vines and flower buds. After entering the melon period, the growth of the plant increased significantly, reaching the maximum at the peak of the fruiting period. During the fruiting period, the nitrogen, phosphorus and potassium absorbed by the loofah accounted for 50% of the total nitrogen absorbed, respectively. 47% and 48%. In the late stage of the melon, the growth rate slowed down and the nutrient uptake decreased, and the reduction of nitrogen and potassium was more obvious. The principle of fertilization is: First, the base fertilizer is used, and 3000-5000 kg of decomposed high-quality organic fertilizer per acre is applied. Second, the seedlings are early, after planting, apply 2-3 times to raise the seedling fertilizer early, and apply 100-150 kg of high-quality decomposed manure and fertilizer per acre to add water to meet the needs of early-onset. Third, the fruit is heavy, and the result is 5-6 times of topdressing in the peak period. Each time, 20-300 kilograms of manure and manure are applied per acre, or 25-30 kilograms of nitrogen, phosphorus and potassium compound fertilizer.
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