Causes and control methods of premature senescence of wheat

Wheat is an important economic crop in China, planting area is very wide, but the leaves will appear yellow in planting, the plant has died before harvest, seriously affecting the yield and quality of wheat. In fact, this is the phenomenon of premature aging of wheat. It will cause the plant to fail to grow normally, senescence and death ahead of time, resulting in shortened filling period and decreased grain weight. What is the cause of premature aging of wheat? Let's take a look at its prevention methods.

1. Drought and water shortage

Wheat needs plenty of water during grain filling. If the climate is dry or the soil is dry, the wheat roots will have difficulty absorbing water or lose water, resulting in damage to metabolism. Especially in the late growth period, high temperature, plant transpiration, water shortage will lead to plant wilt Yan, so that the normal filling can not be carried out, shorten the filling time, improve senescence and death.

Control methods: In wheat growth to do a good job of fertilizer and water management, drought to timely watering, supplement plant growth needs, especially in the filling period, water is extremely important.

2. Insufficient nutrition

Insufficient nutrition is also one of the main reasons for early senescence of wheat. Soil is barren and nutrient deficiency affects photosynthesis of wheat, reducing synthetic nutrition. In the later stage of growth, the nutrients needed are more massive. There is not enough nutrition supply at the filling stage, which will lead to insufficient nutrients and early senescence of plants, affecting yield.

Control methods: in relatively barren planting, to increase the application of organic fertilizer, combined with deep ploughing, improve soil fertility status, topdressing should pay attention to the reasonable combination of nitrogen, phosphorus and potassium fertilizer, which is to ensure the steady growth of wheat, prevent premature aging basis.

3. Soil water

Excessive accumulation of water will lead to poor soil permeability, insufficient oxygen, root breathing difficulties, affecting photosynthesis, nutrient synthesis and accumulation decline. Moreover, with the continuous growth of plants, the waterlogging tolerance of wheat will gradually decrease, and the phenomenon of "supporting death" will occur during grain filling, resulting in leaf chlorosis, premature aging and death.

Prevention and control methods: contrary to drought and water shortage, water management should also be done well. When planting, keep the soil moist and slightly dry. It is not advisable to water too much. In rainy season, timely drainage and waterlogging prevention should be carried out. Weeding or fertilization can be carried out. Loose soil can increase soil permeability, so that root respiration and photosynthesis are normal and premature aging can be prevented.

4. Diseases and pests

It is inevitable to suffer from diseases and insect pests when wheat is planted. If diseases and insect pests are not controlled in time, they will lead to outbreak and epidemic of diseases and insect pests, and finally lead to premature aging of plants, decrease of grain weight, and influence of yield and quality.

Prevention and control methods: complete and sound pest control measures should be established. Prevention and control should be based on prevention and treatment, supplemented by treatment. Daily patrol should be strengthened. Patrol should be conducted once every two days. Pest hazards should be dealt with in time to avoid further harm of pests and diseases, and they should be strangled in the cradle.

The above are the reasons for wheat premature aging and prevention methods, I hope to help you, want to know more about wheat planting knowledge, please pay attention to us.