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Why is the recent "big head" eggplant so much?
The recent phenomenon of large eggplants is more serious, and some growers feel helpless. According to the analysis of the reporter, the reason why the long eggplant appears to be a big one is that it has a lot to do with the weather condition in the previous period and the excessive leaf picking by vegetable farmers. The first is the lack of light. The reporter saw in many greenhouses that a lot of dust on the greenhouse film was particularly large, the light was insufficient, the shed film was not clean, the photosynthesis was greatly reduced, the accumulation of photosynthetic products was less, and the normal long-grown eggplant growth needs could not be met. It's very hard to avoid getting big heads. In response, the reporter suggested that vegetable farmers should remove the old leaves from the lower part of the long-leaved plant in time, wipe the shed film as soon as possible, improve lighting conditions, and promote photosynthesis. Farmers can use small cloth strips on the shed to swing back and forth with the wind and wipe the shed film better. Followed by one-time picking leaves too much. Due to the low temperature and early illumination, there are more yellow leaves in the shed. The reporter found that: in order to prevent yellow leaf infection, vegetable farmers blindly removed the leaves, resulting in insufficient leaves, insufficient photosynthetic products, and long eggplant performance. It is necessary to remove diseased leaves and old leaves to prevent disease, but picking leaves should be appropriate. The new leaves at the top have not yet been fully developed, and the leaf's ability to make nutrients is low, and the new leaves need a lot of nutrients for growth and need to be supplied by other leaves. In particular, the upper and middle leaves are fully developed, and the photosynthetic efficiency is high. The nutrient supply produced by the growing tomato fruit, roots and new leaves grows, which is the main force of photosynthesis in the leaves and cannot be easily removed. The temperature difference between day and night is smaller again. If the temperature is too high, especially if the temperature is too high in the middle of the night, the photosynthetic product of the leaves will be consumed too much, resulting in excessive nutrient consumption. The long eggplant fruits will be incompletely developed and appear large. In this regard, it is recommended that vegetable farmers: should strictly control the temperature inside the shed, widening the temperature difference between day and night. The range of long-pollinated pollination is relatively narrow. Usually the daytime temperature is controlled at 26-28°C and cannot exceed 32°C. The nighttime temperature is controlled at 15-18°C to ensure normal fruit set in the long eggplant. Also, there is insufficient supply of nutrients during fruit setting. In flowering and fruiting period, vegetable growers often control the water and fertilizer to increase the fruit set rate, which leads to the shortage of long water and nutrient supply in the fruit setting period, and then the emergence of large heads. The reporter suggested: In order to avoid the drought-fat-losing phenomenon of the long eggplant during fruit setting, it is necessary to pour enough water to apply sufficient fertilizer in the previous management.