How to prevent the harm of Corn High temperature

At this time of summer every year, it is the dog days, which are the most prone to diseases and insect pests in all crops. It will also have a great impact on the growth of corn, many friends do not know what kind of harm corn will produce in the hot summer weather, and they do not know how to prevent and cure it. Then in the end how to prevent the harm of corn dog days? Let's take a look.

1. Artificial pollination

As we all know, corn in the environment of continuous high temperature and drought, its pollination and fertilization, loose powder and seed setting rate will decline. If the continuous high temperature weather is encountered when the corn is in blossom, it is not conducive to its natural pollination, reduces the probability of pollination and fertilization, and affects the yield. At this time, artificial pollination should be used to increase the success rate of pollination and fertilization of corn in high temperature environment. The time of collecting pollen should be 8-10:00 in the morning, when the pollen is the most and freshest time of the day. Pollinate immediately after picking and increase the pollination rate.

2. Reduce the density

When planting corn, it is necessary to calculate the planting density between the fields. If the density is too thin, it will lead to bifurcations and spikes. If the density is too dense, it will affect the nutrient absorption of each plant and the permeability between the ground. Reasonable planting density can reduce the contradiction between individuals for water, and each plant has normal development, strong growth and strong resistance to high temperature environment. Indirectly reduce the harm of high temperature to corn. If the planting density is already too dense, you can use the wide and narrow row planting method, which can improve the poor permeability, stunting and other problems caused by the density.

3. Scientific fertilization

In the process of fertilizing corn, fertilizer should be applied reasonably and the amount of organic fertilizer should be increased appropriately. The purpose is to promote the nutrient volatilization of base fertilizer in the ground, and pay attention to the use of trace elements. Fertilization should be applied in the seedling stage to enhance the drought resistance of maize stalks and leaves, and the big trumpet stage is mainly aimed at flower ears. The method of mixing water and fertilizer is used to enhance the drought resistance of maize itself. the application of foliar fertilizer at high temperature can not only reduce the temperature and moisturize, but also provide the nutrition needed by corn.

4. Timely watering

High temperatures are very likely to lead to droughts, which should be watered in advance during the drought, which can lower the temperature of the ground and provide plenty of water. The evaporation of the surface is strengthened, which reduces the temperature and reduces the harm caused by high temperature. High temperature will also affect the respiration of corn, the weakening of respiration of corn will lead to hypoplasia of corn, carbon dioxide can not be discharged in time, affecting the seed setting rate. Water can also be directly irrigated on the leaves to lower the body temperature of the whole crop.

It is necessary to remind friends that high temperature and drought will cause heat damage to corn, which will seriously affect the normal growth of corn, resulting in a substantial reduction or even extinction of corn production. In the hot weather, the water demand of corn increases sharply, and many friends still water according to the amount of water before the high temperature, so it leads to the harm of high temperature and reduced yield of corn, so friends must take the harm of high temperature of corn seriously.