Part of the umbilical cracking of eggplant is caused by uneven watering. In the early stage of fruit development, the soil was arid, resulting in lignification of the fruit skin and heavy rain or watering at the end of the fruit period. The fruit inside rapidly expanded and the peel did not grow accordingly, thus causing chapping.
However, most of the umbilical cracking of aubergine is mainly caused by the lack of calcium in the plant, and there are five reasons for the lack of calcium:
One is watering too much or dripping with heavy rain, flushing away the effective calcium in the soil, causing calcium deficiency. This situation is serious in the summer when it is rainy.
The second is the lack of calcium in the soil. In particular, continuous cropping plots do not pay attention to the use of calcium fertilizers and cause calcium deficiency. This phenomenon is more prominent in greenhouses and greenhouses.
Third, excessive application of nitrogen fertilizer in the soil caused excessive accumulation of ammonium nitrogen and inhibited the absorption of calcium.
Fourth, the water circulation in the plants creates obstacles. This phenomenon can be divided into two situations: (1) The soil is dry, the plants lack water supply, and calcium cannot be absorbed and supplied; (2) After heavy rain or watering in summer, the air humidity is extremely high, which inhibits the transpiration of the plants. Can not normally absorb water and calcium, causing calcium deficiency.
Fifth, in the late growth stage, due to management oversight, serious pests and diseases, especially the occurrence of verticillium wilt, blight, root rot, root knot nematode disease, diseased plants, and excessive production, plant aging and other reasons, the root absorption The function is greatly reduced, causing a lack of calcium.
Measures to prevent cracking of umbilical parts of eggplant: First, calcium fertilizers with higher calcium content such as ammonium, calcium, magnesium, etc.; second, timely watering to prevent drought; third, timely prevention and control of pests and diseases; and fourth, strengthening management and spraying every 20 days. The concentration of 0.01% of the natural alfalfa, Shuofeng 481 solution, once promotes root growth and development and improves the plant's absorptive capacity. Fourth, 0.3% ammonium-ammonium is used every 3 to 7 days when the air humidity is high during the rainy season. The magnesium solution was top dressing once.
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