It is now in an important period of maize growth. what is the effect of drought on corn growth?

China has a vast territory, climate distribution characteristics also show a high degree of diversity, rainfall changes throughout the country are also relatively large. Generally speaking, there is less rainfall in July and August in North China and Huanghuaihai region of our country, and farmland is also in an extremely dry state. Drought, as one of the stress factors of plant physiology, will also form a great restriction on the growth and yield formation of maize.

The effects of drought stress on maize physiology are mainly manifested in the following aspects:

growth period

Generally speaking, persistent drought will shorten the growth cycle of corn, drought will cause certain restrictions on the growth and development of corn, and while the development is delayed, corn will accelerate its development in advance in order to complete reproductive growth, thus shortening the growth period. This is also the principle of rapid ripening by drought means when corn is about to be harvested.

plant type

Drought directly leads to interference with various physiological indexes of maize, such as increased ion concentration in cytoplasm, which increases the difficulty of nutrient transport, and secondly, wilting of leaves due to water loss caused by drought stress. It reduces the effective utilization rate of leaf area and reduces photosynthesis.

yield

If drought occurs during the pollination period of corn, the pollen vitality of corn will also decrease a lot, resulting in incomplete fertilization and blank ears on the cob. Even if fertilization is completed, the development of corn ears will be restricted due to drought, and usually the seeds will be shriveled. Even the head of the ear could not develop! This results in lower plant yields.

To sum up, drought has a very large impact on corn yield. For example, in early spring this year, a large area of drought at corn seedling stage in Northeast China is expected to directly lead to a decrease in corn yield this year. For arid areas, we should give full play to the advantages of water conservancy facilities and concentrate limited water resources to ensure agricultural production. To avoid losses caused by drought, and for large-scale drought, meteorological departments can also implement artificial rainfall measures to alleviate drought symptoms.

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