In summer maize growing season, it is weather, disasters, floods and other meteorological disasters that frequently occur. Every year, corn of different areas and degrees is affected. How to deal with these meteorological disasters in corn production?
1. Flood Relief: Corn suffers from locust plague during germination and emergence, which can easily lead to soil compaction, ground temperature drop, poor ventilation, affecting seed germination and emergence, and the soil should be loosened timely after the disaster, in order to facilitate warming and ventilation; before the jointing of corn to tasselling, especially Prior to the big bell mouth period, when the male and female ears and some leaves have not yet been taken out, they will suffer locust plague. As long as the unextracted leaves are not damaged and the roots remain, as long as timely cultivating, fertilizing, and strengthening field management, generally a good harvest can be obtained; After heading, it suffered from locust plague, and the ability of plants to restore growth deteriorated, affecting the yield. According to investigations, any corn that has been cut off by hail will not be able to resume growth; if the section is intact, management should be strengthened in time to promote plant growth and reduce yield loss.
2. Wind disaster: In July and August, frequent stormy weather caused corn lodging or stem breakage. Corn that is lodging or stem-folding before maturity should be raised in time to avoid mutual pressure and affect photosynthesis. For inverted corn, if it is only rooted, the plant can be straightened; if it is a stem fold, several plants should be bundled together to make the plants support each other.
3. Flood Relief: Maize is a crop that requires large amounts of water but is not tolerant. When the soil moisture exceeds 80% of the field water capacity, the growth and development of the plant is affected, especially at the seedling stage. In the late growth period of maize, under high temperature and rainy conditions, the rhizosphere often suffocates due to lack of oxygen, resulting in a rapid decline in viability, and the plants are immature and withered, which has a great impact on the yield. According to surveys, corn has accumulated water for 1–2 days before and after tasselling, and the impact on yield is not obvious. The accumulated water cuts production by 20% in 3 days, and the accumulated water reduces production by 40% in 5 days. For corn that suffers from locust plague, early elimination of water in the field, reduction of soil and air humidity, and promotion of plant growth should be encouraged. When the land can be released, cultivators and soils should be cultivated in time to remove compaction, prevent lodging, improve soil permeability, and make plants The roots resume normal physiological activities as soon as possible; timely application of available nitrogen fertilizers accelerates plant growth and mitigates damage from floods.
In addition, after corn has suffered hail and plague, it will often hinder plant growth and development, and if necessary, artificial ripening can be performed.
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