The phenomenon of convulsions and flowering in Chinese cabbage in early spring has a serious impact on production. Why does it cause convulsions and flowering? This is because:
I. Improper selection of species
At present, the main Chinese cabbage varieties are mainly Korean and Japanese varieties. In the production process, many vegetable farmers lack understanding of early-spring Chinese cabbage varieties, and they often choose their varieties based on their experience or following the trend. Sometimes they will get good-growing varieties in the summer and autumn and plant them in the early spring. They will have strong heat resistance and poor cold resistance due to summer sowing varieties. , causing premature convulsions. Autumn cabbages are mostly late-maturing varieties, although their ability to resist seizures is strong, but due to the long growth period, it is bound to cause high temperature in the late spring and can not form normal leaf spheres, making Chinese cabbage poor.
Second, the sowing period is not reasonable
Some vegetable farmers mistakenly believe that early sowing of Chinese cabbage can be used in the morning market, while in the morning market prices are high, so blind sowing is possible. Some vegetable growers once sowed in the "spring of the year" in the previous year succeeded in sowing, so that they would be sowed earlier in the "big winter" season next year. Because of the low temperature, they would convulse and cause losses to production.
Third, management factors
Some vegetable farmers still have some problems in management: First, they neglected the insulation work during the seedling period. Cabbage is a vernalized vegetable with seed germination, which means that after the seeds of Chinese cabbage begin to germinate, the vernalization process can be completed after the germination period, seedling stage, and rosette period are affected by the low temperature for a certain number of days. Chinese cabbage is weak in winter, and the requirements for vernalization temperature are not strict. Usually, the vernalization process can be completed within 10-15 days at a temperature of 2°C-10°C. Once through the vernalization process, a long daylight of 14 hours at 18°C ​​to 20°C can quickly induce flowering and lose economic value. Must strengthen the management, cold insulation, so that the temperature during the seedling period above 13 °C, so that the spring conditions of Chinese cabbage can not reach the low temperature.
Secondly, some of them have used the management experience of autumn Chinese cabbage for early spring planting, neglecting the fact that the growth time of Chinese cabbage in early spring is shorter than that of Chinese cabbage in autumn. It is not timely to apply fertilizer and water after planting, resulting in poor nutrition. Poor growth, can not be normal ball, but also easily lead to early bolting flowering.
IV. Insufficiency of pest control
Some vegetable farmers believe that in the early spring Chinese cabbage is basically free of pests and diseases, and it does not need to be controlled. Once pests and diseases occur, they often miss the best opportunity for prevention and control. In addition, the lack of control or improper use of medicines, resulting in reduced production or even affecting growth, can also lead to seizures.
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