Estimation of spring sowing and crop development in January and April
In April, the national spring sowing work will be carried out in large areas. The northeast, Jianghuai and Jianghan rice fields entered the stage of sowing and breeding; the spring maize in the central, eastern, northeast, northwest, western and northern parts of Inner Mongolia entered the seeding stage; the spring wheat in Xinjiang and eastern Inner Mongolia entered the seedling emergence stage; Xinjiang, the Yellow River Basin and the Yangtze River Basin Cotton enters the stage of sowing and emergence; potatoes in Inner Mongolia, the northwestern part of China and North China enter the sowing period.
Winter wheat in the north generally enters the stage of jointing to heading; the rapeseed in the middle and lower reaches of the Yangtze River is in the stage of flowering and pod-forming; the early rice in the south of the Yangtze River is in the stage of breeding, and the early rice in southern China begins to transplant; the grain-harvesting crops in the southwest of China enter the stage of filling and filling.
Prospects for meteorological conditions of spring tube spring in April and April
Spring sowing in the north: The temperature in the northwest and northeastern regions is slightly higher than that in the same period of the year, which is conducive to the sowing of rice in the northeastern China and the timely sowing and seedling growth of spring wheat, spring maize, potato, cotton and other dryland crops. However, most areas have less precipitation and large winds. Dust weather is more, and soil water dispersion is accelerated. Drought may occur in the western part of the northeastern part and the northwestern part of the country, which is unfavorable for the growth of dry crop seedlings. The precipitation in the southern part of North China and the eastern part of Huanghuai is more favorable for soil growth and is beneficial to the growth of spring-sown crops.
Spring sowing in the south: the temperature in the northeastern part of the upper part of the Yangtze River and the Huaihe River and the southwestern part of the southwest is high, which is conducive to the sowing of rice in the first season and the sowing of cotton and spring maize. The precipitation in most areas is slightly less, and the soil moisture is more suitable now. The possibility of drought in the range is small; the precipitation in the northern part of the Yangtze River is high, which is conducive to the sowing and emergence of spring-sown crops; the precipitation in the eastern and southern parts of the southwestern region is relatively high, and the drought in southern Sichuan, northeastern Yunnan and parts of southern China is expected to be moderated, which is conducive to the growth and development of spring-sown crops.
Winter wheat area in the north: The temperature in the eastern part of the northwest is high, and the current bottom is better, which is conducive to the growth and development of winter wheat. The temperature in most parts of Huanghuai in North China is slightly lower, and the precipitation is slightly more, which is conducive to the differentiation of winter wheat spikes and jointing and heading, but some areas may Late frost appeared, causing winter wheat to be frozen.
Rapeseed area: The temperature in the middle and lower reaches of the Yangtze River is relatively high, and the precipitation is slightly less, which is conducive to accelerating the growth and development of rapeseed and promoting the formation of yield. There is a lot of precipitation in the eastern part of the southwestern region, and there may be staged rainy weather, which is not conducive to flowering, pod formation and maturity of rapeseed.
Early rice area: The temperature in the south of the Yangtze River and the central and eastern parts of South China is high, which is conducive to the growth of early rice seedlings. However, the temperature in the western part of South China is low, and there may be a low-temperature weather process, which is not conducive to the growth of early rice seedlings and transplanting tillers.
Third, agricultural production advice
First, the spring sowing area in the north should be broadcast in time to avoid delays in farming time. In the northeast region, according to the farmland sensation and temperature rise, the sowing period should be arranged reasonably so as not to delay the farm time; in the northwest, north China and Huanghuai areas, the spring corn, cotton and other crops should be planted in time, and the areas with different grievances should be actively planted.
Second, the northern winter wheat area strengthens water and fertilizer management to promote the formation of large ears. In the winter wheat area in the north, it is necessary to carry out the classification management of water and fertilizer and promote the formation of large ears in response to the late development of wheat in this year, with the characteristics of lyrical and good seedlings. At the same time, we must also guard against the danger of late frost.
Third, the southern region should clear the ditch in time to promote crop growth and timely spring sowing. In the south, it is necessary to timely apply fertilizer according to the growth of food crops in summer, timely clearing the ditch, preventing premature aging of roots and promoting the formation of crop yield. Jianghuai, Jianghan and the southwestern part of the country should plant a crop of rice, cotton and other crops in time, and manage the seedling period.
Fourth, the Jiangnan and South China rice areas should be cultivated and transplanted in time. The early rice area in the north of the Yangtze River should seize the favorable weather and timely sowing, using film and greenhouse to reduce the impact of cold air; southern Jiangnan and South China should strengthen the management of the paddy field, cultivate the strong and timely transplant the early rice.
Fifth, the southwestern dryland should pay attention to water conservation and drought relief. Southern Sichuan and Yunnan should do a good job of rational water use and scientific drought relief, and actively carry out artificial precipitation enhancement in light of weather conditions. Pay attention to the favorable opportunity to seize the rain and transplant rice and flue-cured tobacco in time.
Sixth, all localities should strengthen the monitoring and prevention of spring diseases. As the temperature rises, agricultural pests and diseases will continue to enter a high-incidence period. All localities should strengthen the monitoring and control of spring diseases such as wheat stripe rust, sheath blight and rapeseed sclerotium.
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