Eggplant is an annual herb that is a perennial shrub in the tropics. Eggplant developed root system, adult root depth of 1.5 m or more, lateral root diameter of more than 1 m, eggplant root protected cultivation mainly in the 0 - 30 cm topsoil. The regeneration ability of eggplant roots is poor, and lignification is earlier, and it is not suitable for multiple transplants. Eggplant has strict temperature requirements, slow growth at temperatures below 17 °C, physiological metabolic disorders below 10 °C, and falling flowers below 15 °C. The suitable temperature for flower bud differentiation is 2O °C - 25 °C, and 15 °C - 20 °C at night . When the temperature is low, the flower bud differentiation is delayed, but the long column flower is more; on the contrary, under the condition of high temperature, the flower bud differentiation is earlier. However, the proportion of the middle column flower and the short column flower increased, especially for the high night temperature and short column flower. Fertility temperature is 22 °C - 3O °C, white 25 °C - 28 °C, night 16 °C - 20 °C is conducive to eggplant development. First, the fertilizer requirement characteristics of eggplant eggplant is like fertilizer crops, eggplant fruit set effect on soil conditions and fertilization larger. When the nutritional conditions are good, there are few flowers falling, malnutrition will increase the short-column flower, the flower is poorly developed, and it is not suitable for fruit. In addition nutritional status also affects the position of flowering, when adequate nutrition, flowering parts of the branches can be expanded 4--5 leaves, malnutrition, expanded leaves little flower grow. The absorption of nitrogen, phosphorus and potassium by eggplant increased with the prolongation of growth period. At the seedling stage, the absorption of nitrogen, phosphorus and potassium was only 0.05% , 0.07 % and 0.09 % of the total. Early flowering uptake gradually increased to full fruit to the total absorption of about 90% or more of the unsuccessful Nutrients, wherein full fruit accounting for about 2/3. Each growth stage nutrient requirements for different initial fertility fertilizer is mainly to promote vegetative growth of the plant, with the progress of growth period, to transport nutrients to increase the amount of flowers and fruits. In the flowering stage, nitrogen and potassium uptake increased significantly during this period if nitrogen is not enough, spend dysplasia, increased stub flower, lower yields. The production of 1000 kg of eggplant requires 3.2 kg of pure nitrogen , 0.94 kg of phosphorus pentoxide , and 4.5 kg of potassium oxide . Eggplant mu 4000--5000 kg pure helium required 12.8 - 16 kg, phosphorus pentoxide, 3.8 - 4.7 kg, potassium 18 - 22.5 kg. Second, eggplant fertilization technology l . The seedling stage of the seedling-fertilizer eggplant has higher requirements on the quality of the nutrient soil. Only the high-quality nutrient soil can cultivate the strong seedlings with short internodes, thick stems and developed roots. Generally, it is required to apply 200 kg of decomposed and sieved organic fertilizer , 5 kg of superphosphate , and 1.5 kg of potassium sulfate on a seedbed of 11 square meters, and mix the bed soil with organic fertilizer and fertilizer. If nutritive soil nursery, may be added to the 4/5 and 1 composting manure / manure composting human 5 obtained by dry mixing organic fertilizer garden soil medium quantity, method of preparation can also refer tomato seedling nutrition soil. If you encounter low temperature or insufficient soil fertility, spray 0 . 3 %- 0 . 5 % aqueous urea solution. In order to effectively prevent squatting, the soil can be covered. Soil is a drug with 50% of carbendazim or thiophanate 8--10 g, was mixed with the nutrient from 12 kg. Soil can be sown in a disposable drug before the seedling bed surface, also with 2/3 scattered on the bed surface, with a 1/3 sprinkled on the sowing of seed before sowing. Sometimes the drug has an inhibitory effect on the root growth of the seedlings. Once the inhibition occurs, a large number of waterings can be relieved. 2. The base fertilizer eggplant is susceptible to verticillium wilt, and the protected area of ​​cultivated eggplant should be avoided. If the barrier time is short, it must be disinfected in a protective manner. Calculated by the protected space 4 with sulfur per cubic meter. 0 g, 80 % dichlorvos 0.1 g, sawdust 8.0 g mixed and ignited, closed for 24 hours before releasing air. Protected sterilized per acre 5000 ~ 6O00 kg decomposition of organic fertilizer, together with 25 - 35 kg of superphosphate and 15--20 kg potassium, uniformly spread on the surface of the soil, combined with the plowing uniformly harrow Plow the soil. 3 . Fertilizer before planting eggplant acres of organic fertilizer 5000 kg, phosphorus 25 - 35 kg. When (when the fertilized ovary enlargement expose flowers, etc.) "eggplant door" to achieve the "stare" period, the fruit began to grow rapidly, this time for the first time top dressing. Apply 4 - 5 kg of pure nitrogen ( 9 - 11 kg of urea or 20 - 25 kg of ammonium sulphate ), and carry out the second top dressing when the fruit of 'the eggplant' is inflated. When the "four-faced bucket" begins to develop, it is the eggplant to be served. At the peak, the third top dressing is carried out. The amount of top dressing is the same for the first three times, and the amount of top dressing can be halved or not.
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