Zhouzhuang Town, Xuhuahua, Xinghua City, said on January 19 that he had contracted more than 200 mu of land to grow Dutch beans this year. Now the Dutch beans are in the 7-8 leaf stage. After the recent cold weather, the Dutch beans were frozen. Most of the plants only had frozen leaves in the lower leaves. The heart leaves were not frozen, and a few plants were frozen. In the past, the Dutch bean was sown in the autumn, and there was no such serious frost damage. The temperature was very low recently, and the Dutch beans of other farmers in the area also suffered severe freezing damage. He asked how the Dutch beans were remedied after being frozen.
Xu Dongxu, senior agronomist of the Xinghua City Institute of Vegetable Science, said in an interview with reporters that Dutch beans are susceptible to freezing when the temperature drops to -5°C. Planting Dutch beans in the open field has a high chance of encountering a temperature of -5°C in the winter, with a high risk of freezing damage. The low temperature this winter and long duration, coupled with the early drought, it is easy to cause freeze damage to the Dutch beans at seedling stage. In order to prevent frost damage in winter, it is best to cover three layers of mulch and small sheds in greenhouses and greenhouses. At the same time, in the winter cold season to strengthen the temperature management, in the small arch shed covered grass rake, non-woven fabrics and other materials, the shed film to be strict. In addition, in order to prevent the occurrence of frost damage in winter, cold-resistant varieties should also be used. In open field cultivation, the sowing date should be postponed until the end of January and early February.
The unlimited growth habits of Dutch bean, in case of low temperature and freezing, as long as the roots and stems do not freeze, the plants will not die, and after the temperature rises, new vines will be issued again. Only the lower part of the Dutch bean plants with frozen leaves can recover quickly, but the yield will be affected, and the yield will generally be reduced by 30%; the frozen plants of the whole plant will not be able to resume growth. For the above-mentioned frozen field blocks, appropriate fertilization can be used to promote the restoration of plant growth. The fertilizer is mainly composed of phosphorus and potassium fertilizers, and appropriate amount of nitrogen fertilizer is used. The dry and water-deprived fields of the soil can be properly irrigated. However, attention should be paid to irrigating in sunny days with high temperatures and speeding in order to avoid accumulation of water and ice in the fields.
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