First, the variety selection

Different varieties can be selected depending on the consumer market. Variety should be selected for greenhouse cultivation, low temperature and high humidity resistance, high quality, disease resistance, high yield, such as Japanese sweet, best Jing Xin, Toyota Mary and so on.

Second, soil preparation and fertilization

The greenhouse cultivation density is generally high, so the soil preparation should be fine. Generally used small high ridge or sorghum cultivation, 2.8-3.2 meters between the arch shed brackets, two rows in the middle, 650-700 plants in the acre, three vines, and one melon per plant. When using ground viticulture, it can be used as a north-south direction.

Third, greenhouse seedling technology

Watermelon and rootstock seeds can be soaked in water at 55 ° C - 60 ° C, seeded after germination, and disinfection of seedbed and nutrient soil. When the watermelon seedlings grow to the cotyledons, the true leaves of the pumpkin rootstocks grow to the size of the soybeans, and they are grafted or docked. When the grafted watermelon seedlings grow to 4-5 true leaves, they are subjected to low temperature exercise, and they are robbed in early March. Planted on a sunny day.

Fourth, field management after planting

After planting watermelon in greenhouse, it is mainly integrated management of fertilizer, water, temperature and humidity and gas regulation.

1. Pollution-free formula fertilization

(1) Application of base fertilizer: 4-5 square meters of high-quality manure or 3000-4000 kg of fully decomposed chicken manure, 150 kg of cake fertilizer and 25-30 kg of potassium sulfate.

(2) Reasonable topdressing: On the basis of applying the base fertilizer, according to the characteristics of plant growth and development, it is necessary to lightly apply seedling fertilizer, skillfully apply vine fertilizer, and re-apply the fertilizer to meet the needs of watermelon growth and results.

(3) Foliar fertilization: In the middle and late stages of watermelon growth, 0.3% potassium dihydrogen phosphate solution can be sprayed on the foliage.

2. Temperature and humidity management in the greenhouse

(1) Temperature management: Within 5-7 days after the setting, it is necessary to pay attention to increase the ground temperature and keep the seedlings above 27 °C. During the flowering period of watermelon in greenhouses, sufficient light and high night temperature should be maintained to prevent excessive temperature difference and excessive temperature, resulting in deterioration of fruit quality and quality.

(2) Humidity management: The relative humidity of the air in the greenhouse is high, and the air humidity can be significantly reduced under the condition of covering with the plastic film.

3. Gas regulation

The carbon dioxide content in the air under the closed conditions of the greenhouse is seriously insufficient and should be supplemented.

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