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From July 29th, Anhui Province has experienced a wide range of high temperature above 35°C from north to south. Most areas have exceeded 37°C since August. The highest temperature in Hefei and Feixi individual towns on August 3 is above 40.0°C.
Due to the fine weather in a few days, the precipitation is scarce, the crops are in a prosperous growth period, and the evapotranspiration of the farmland is accelerated, resulting in a significant drop in soil moisture. The soil moisture monitoring results on July 28 showed that although the soil moisture in most areas of the tillage layer (10-20 cm) was suitable, the relative humidity of the soil surface layer (0-10 cm) decreased significantly, and light drought occurred in some areas. After July 29, there will be a continuous high temperature in a large area, and the soil drought in the farmland will be further expanded.
At present, the cotton in Anhui Province is in the flowering and bolling period, the summer soybean is in the flowering stage, and the pods are successively pod-forming. The sweet potato is still in the elongation period of the potato, and the summer maize enters the tasseling stage; the middle season rice is in the jointing and booting stage; the double early harvest is nearing the end, double Later transplanted and returned to green.
The recent fine weather is conducive to harvesting and drying in the early mornings along the Yangtze River, but the continuous hot and cold weather is very unfavorable for the growth of crops in the area. High temperature and low rainfall caused the drought of farmland to further intensify. The crops in the ground caused water deficit, which affected normal growth, causing wilting or even death. The high temperature affected the flowering pollination of autumn harvesting crops and the first season of rice, which also easily caused cotton buds to fall off. Crop yield.
According to the latest forecast of the Anhui Meteorological Observatory, the province will still be dominated by sunny and hot weather in the next week. The maximum temperature in most areas on August 4 will still exceed 35 °C. There will be a more obvious precipitation process around the 5th. According to this suggestion:
1. Master the water layer management for the rice in the booting stage, shallow water irrigation, daily irrigation, timely drying, and improve the microclimate in the field. Late rice transplanting should be arranged in the morning and evening as much as possible. The transplanted rice should pay attention to water temperature regulation, prevent high temperature burning and promote green growth.
2. The crops along the Huaihei River in the north and autumn are in a period of vigorous growth. It is necessary to strengthen the management of farmland fertilizer and water and the prevention and control of pests and diseases. In areas where conditions are available, water should be used in the early and late evenings to reduce the burns of high temperature crops and ensure autumn harvest crops. Normal growth.
3, the heat and high temperature cause the temperature of the soil surface to rise sharply, it is easy to cause the vegetable leaves to burn, resulting in fruit and fruit falling and falling. Cover with sunshade net to avoid direct solar radiation; properly watering, cooling by evaporation, but avoid watering in the afternoon high temperature.
4. Grasp the precipitation process around the 5th, strengthen the management of fertilizer and water for drought-affected crops, promote crop growth, and mitigate the hazards of high temperature and drought; at the same time, it is necessary to store water in the gully reservoir to prevent drought in the later period.
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