How to deal with hail weather is harmful to crops?

First of all, timely drainage and intertillage.

The mechanical impact of hail is very strong, which will tamp loose soil and cause hardening. The longer the duration, the greater the effect on soil hardening, which leads to the decrease of soil temperature in plough layer and the increase of field humidity, which seriously damages the growth environment of crop roots. Therefore, after the hail disaster, ditch cleaning and drainage should be done in time to reduce soil moisture, and continuous intertillage should be carried out in time. Especially clay land is more important to avoid dead trees caused by silt hardening. Remove the broken branches and leaves in the field, shake off the soil on the branches and leaves, and straighten the plants. Do not artificially damage the stems and leaves or cut off the broken stems and leaves, so as not to reduce the green photosynthetic area and affect the recovery of crops.

Second, topdressing nitrogen fertilizer in time.

Timely application of quick-acting nitrogen fertilizer after disaster can improve the nutritional status of crops, promote their later growth and make up for disaster losses on the basis of restoring their growth as soon as possible. For general plots, 5-7 kilograms of urea can be applied topdressing per mu. When topdressing, the fertilizer should be separated from the plant 10- 13cm to prevent root burning.

Third, eliminate diseases, pests and weeds in time.

The mechanical damage caused by hail will lead to the decrease of photosynthetic efficiency, the weakening of water and fertilizer absorption capacity of crops and the slow growth; Most of the regrown crops are young branches and leaves, which have poor resistance to pests and diseases and are vulnerable to pests and diseases. Therefore, it is necessary to eliminate diseases, weeds and insects in time. Combined with foliar spraying, 75% chlorothalonil wettable powder or 25% metalaxyl wettable powder was added 500 times to control diseases.

Fourth, replant in time

According to the specific situation analysis and economic accounting, more than 50% of the affected fields have been replanted. Before replanting, crop stubble should be arranged reasonably, and it is best to plant vegetables with short growth period, which can be harvested in the first and middle months of 10, without affecting the sowing and planting of early spring crops.

Fifth, promote maturity and harvest in stages.

After hail, crops generally mature late. In the early stage of crop growth, more phosphorus and potassium fertilizers should be applied to promote early maturity. On the other hand, crops should be harvested in stages to increase yield.