Such vegetables include tomatoes, eggplants, and bell peppers. The common characteristic of this kind of vegetables is that there are many types of infinite growth, with budding, flowering, and edge results. Therefore, we must pay attention to adjusting the contradiction between its vegetative growth and reproductive growth in order to obtain a better harvest. Only a sufficient nitrogen supply can ensure normal photosynthesis and maintain the continuous growth of dry matter. Prenatal nitrogen deficiency, the lower leaves are susceptible to ageing and falling off, and nitrogen deficiency at the late growth stage leads to a reduction in the number of flowering and a low fruit setting rate. However, excess nitrogen may cause the vegetative growth to be excessively profuse. The flowering is easy to fall off and the fruit enlargement is limited. After entering the reproductive growth period, the demand for phosphorus increased sharply, while the demand for nitrogen decreased slightly. Therefore, we should pay attention to the appropriate application of phosphate fertilizer, nitrogen fertilizer control. Adequate potassium can make photosynthesis of vegetables prosperous and promote fruit enlargement. This kind of vegetable should pay attention to the fertilizer of phosphorus and potash fertilizer and ensure the balanced supply of nutrient of nitrogen, phosphorus and potassium. This is the guarantee of high yield and high quality of solanaceous vegetables.
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