Weather that damages crops in autumn and winter.

The weather that harms crops in autumn and winter includes: blizzard, cold wave, drought, freezing injury, strong wind, frost and so on.

1, Blizzard

Blizzard will cause a lot of snow to cover crops, which may make crops fall, break or even die because they can't bear the weight of snow. Blizzard weather is usually accompanied by low temperature, which may lead to soil freezing and crops freezing. Snow and freezing may block the water supply in the soil, make crops short of water and affect their normal growth.

2. Cold wave

Cold wave weather will bring severe cooling, and crops will be threatened by low temperature and freezing injury. When the temperature is lower than the tolerance limit of crops, the growth and development of crops will be affected and even lead to death.

3. Drought

Drought will cause physiological disorder of crops, leading to slow growth, poor development, decreased yield and even death. Drought will lead to soil water shortage, so that crops can not absorb enough water, affecting normal growth and development.

4, frostbite

When the temperature is lower than the tolerance limit of crops, the water in crop cells will freeze, which will lead to cell expansion and even rupture, thus affecting the growth and development of crops. When the temperature is too low, the transpiration of crops is weakened, which leads to the destruction of water absorption and transpiration balance, thus causing physiological drought and leading to crop dehydration and death.

5. Strong wind

Strong winds will cause crops to fall or break, thus affecting their growth. Especially for tall crops, such as corn and sorghum, strong winds will pose a greater threat to them. Strong wind will accelerate crop transpiration, make it lose too much water and lead to physiological drought. At the same time, strong winds will also cause soil erosion, leading to farmland topsoil loss and affecting crop growth.

6. Frost

Frost damages crops mainly because low temperature makes the water in plant cell gaps form ice crystals, which continue to capture the water in the cells, and the ice crystals gradually expand, which not only consumes the water in the cells, but also dehydrates the protoplasm to deteriorate the protoplasm colloid, thus causing damage to the cells.