Agricultural activities at the hottest of the 24 solar terms?

The high temperature in summer means that it is the hottest time of the year. At this time, the high temperature is the fastest time for crops to have children, so agricultural management is very important at this time. Then, this issue of the Old Yellow Calendar will take you to see the agricultural activities in midsummer.

Summer solar terms are the period with the most sunshine and the highest temperature in South China, the period with the richest precipitation, the most common thunderstorms and the most concentrated days with high temperature above 30℃ in the west of South China, and the period with the most frequent high temperature above 35℃ in the east of South China.

In Da Chun, higher temperature is beneficial to the flowering and filling of crops, but too high temperature will inhibit the growth of crops and significantly reduce the seed setting rate of rice. Light, heat and water are at the peak of a year after rainfall in western South China, which promote each other and form good climatic conditions for crop growth in Da Chun, but attention should be paid to flood control and drainage.

Agricultural activities in summer: 1. Early rice harvesting and late rice transplanting are "yellow in summer, day and night". For areas where double-cropping rice is planted in China, timely harvesting of early rice can not only reduce the harm caused by wind and rain in the later period, but also ensure high yield and harvest, so that double-cropping rice can be sown in time and strive for sufficient growth period. According to the change of weather, arrange flexibly, cut more on sunny days and variety on cloudy days. We should finish planting for two nights before the end of July, and start in autumn at the latest.

Second, the leaf area of cotton irrigated at flowering and boll stage reaches the maximum in its life, which is the peak of water demand. It is best to require that the field soil moisture accounts for 70-80% of the field water capacity. Less than 60% will lead to flowering and bolling, and must be irrigated immediately. It should be noted that it is not advisable to irrigate when the temperature is high at noon, so as to avoid excessive changes in soil temperature and aggravate the shedding of buds and bolls.

Soybean flowering and pod setting is also a critical period of water demand, which is very sensitive to water shortage. An agricultural proverb says, "When soybeans bloom, river shrimps touch the ditch." If there is drought, you should water it in time.

Third, drought resistance and summer heat, water evaporation is particularly fast, especially in the middle and lower reaches of the Yangtze River during the summer drought period, and the demand for water by vigorously growing crops is more urgent. It's really "a little summer rain is like silver, and a big summer rain is like gold."

Summer maize in Huanghuai Plain has been generally jointing and heading, and heading is about to happen, which is the most critical period for yield formation, so it is necessary to guard against the harm of "neck drought".

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