One, watering

The pumpkin has a strong root system with strong water absorption and drought resistance. Large and large pumpkin leaves, transpiration is strong, so irrigation must be timely, in order to obtain high yield. After 1 week of planting, the water was irrigated once a week to promote the growth of branches and leaves; Afterwards, depending on the weather conditions, it should be properly watered to ensure fruit development. After the fruit is fully grown, the water should be properly controlled to promote fruit dry matter accumulation and improve pumpkin quality.

Second, fertilization

According to the characteristics of the pumpkin need fertilizer. Different stages of pumpkin growth have different nutrient uptake. In the seedling stage, the growth of the pumpkin is very small, and the amount of fertilizer required is also less. The absorption of nitrogen is increased sharply during the period of fruit enlargement, and the absorption of potassium and nitrogen is basically the same. Phosphorus absorption increased less. According to the Miyazaki Agricultural Experiment in Japan, the absorption of nitrogen, phosphorus, potassium, calcium, and magnesium increased slowly in the first 1/3 of the 137 days from the time of planting to pulling, and the middle third of the time increased rapidly. The most significant increase in the last 1/3 of the time. The absorption of nutrients during the whole growth period of pumpkin was the most potassium and nitrogen, followed by calcium, and the absorption of magnesium and phosphorus was the least. Producing 4,308 kilograms of pumpkin per 667 square meters requires absorption of 20.5 kilograms of nitrogen, 6.9 kilograms of phosphorus pentoxide, and 25.1 kilograms of potassium oxide. Specific fertilization requirements are as follows.

1 basal fat. Mainly organic fertilizer, with nitrogen, phosphorus, potassium compound fertilizer. Commonly used basal fertilizers include manure, compost or green manure, and the amount is relatively large, generally accounting for 1/3-1/2 of the total amount of fertilizer applied, and 3,000-4,000 kg of organic fertilizer is applied per 667 square meters. All or most of the phosphorus and potassium fertilizers are used as basal fertilizers, and they are mixed with organic fertilizers and applied to the soil. In the case of organic fertilizers, 15 to 20 kg of nitrogen, phosphorus and potassium fertilizers are applied per 667 square meters. Basal fertilizer has two methods of application and centralized application. When spreading, it is generally combined with deep plowing. After organic fertilizer or compound fertilizer is evenly applied, it is repeatedly poked twice with a screw plough to make the fertilizer evenly mixed with the soil. In the case of low fertilizers, it is common to use a centralized ditching method to apply the fertilizer to the sowing line.

2 top dressing. Top dressing is mainly quick-acting nitrogen fertilizer, combined with application of phosphate fertilizer and potash fertilizer. The amount of topdressing generally accounts for 1/2-2/3 of the total amount of fertilizer applied. When topdressing, different batches of nitrogen, phosphorus, and potassium are required for different growth stages of the pumpkin. Fertilizers are mainly nitrogen fertilizers at the seedling stage to promote seedlings. Generally 5-8 kg of urea is applied per 667 square meters. During the result period, not only sufficient nitrogen fertilizer is supplied, but also timely supplementation of phosphorus and potash fertilizers is required to ensure that the fruit is fully expanded. Generally after the fruit set, urea 10-15 kg per 667 square meters, potassium sulfate 5-10 kg, a total of 1-2 times. Pay attention to the position when applying fertilizer. Top dressing should be applied near the base of the plant during the seedling stage. After entering the result period, the topdressing position should gradually move to both sides of the plant. In calcareous soils, nitrogen fertilizers should follow the principles of fertilizing in deep soils, especially ammonium bicarbonate. It is imperative to apply about 6 centimeters or more of soil in order to avoid evaporation of fertilizers and reduce fertilizer efficiency. Ammonium sulphate, urea and other chemically stable nitrogen fertilizers can be topdressed with paddy water and topdressing. In the middle and late stages of squash growth, the ability of roots to absorb nutrients weakened. In order to ensure the growth and development of pumpkins, nutrients can be supplemented with extra-root fertilizers. Fertilizer can be applied 0.2%-0.3% of urea, 0.5%-1% of chlorinated fertilizer, 0.2%-0.3% of potassium dihydrogen phosphate, usually sprayed every 7-10 days, several fertilizers can be alternately applied , spray 2-3 times. Source: Beijing Municipal Bureau of Agriculture Information Network

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