Eggplants in plastic greenhouses are mainly cultivated in early spring, and seedlings are mostly grown in electric greenhouses in greenhouses. When the eggplant seedlings grow to 4 to 5 true leaves, if the lower leaves are light in color, they can be sprayed with 0.1% to 0.2% potassium dihydrogen phosphate or urea. When the seedlings grow to 8 to 9 true leaves, they are planted with buds. Eggplants are hi-fertilizer crops. They have a long growing period, and they have a long period of time. They have high yields and require large amounts of fertilizer. Therefore, it is imperative to apply basic fertilizers before planting. However, the amount of fertilizer used in the old shed and the new shed should be different. Because the old shed has more residual fat than the new shed soil, the new shed will be more fertilized than the old shed. The exact amount to be applied depends on the target yield, the effective nutrient content contained in the fertilizer, and the nutrient content available in the greenhouse soil. After determination, most of the old shed soil has excess nitrogen and phosphorus is enriched. In the case of potash fertilizer, 6000 kg of organic fertilizer is applied per 667 square meters. If it is an old shed, the application amount can be reduced and 20 to 30 kg of potassium sulfate can be added. Organic manure must be fully decomposed. The organic fertilizer and potassium should be fully applied, and then turned into the soil. Note that the manure and the soil should be fully mixed, the soil blocks should be broken, the land should be leveled, ridges or sorghum should be made, and ready for planting. Planting does not require fertilization after flowering and fruiting, and cultivation management is mainly temperature management. Flowering fruiting organs are thicker, shorter in internodes, larger in leaves, larger in buds, and glossy in leaves. The developed roots are the profusion of high yield; if the stems of eggplant are fine, the leaves are small, the color is light, and the flowers are small, indicating the body Weak, often caused by lack of fertilizer. At this point, 0.2% urea or potassium dihydrogen phosphate can be sprayed on the leaves. After the door eggplant sat, apply 20 kg of ammonium sulfate per 667 square meters and apply it to a hole or a hole. After harvesting, it can be applied with 15 kg of urea or 1,000 kg of manure. The eggplant enters the harvesting period, indicating that it has entered a period of fruitful results. In this period, water should be poured every 7 to 8 days, and once every second application of water, organic fertilizer and chemical fertilizer should be used alternately. The application amount is 15 to 20 kg of ammonium sulfate or 1,000 kg of diluted feces. After harvesting, add 10 kg of potassium sulfate to supplement the deficiency of potassium in the soil.
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