Since the beginning of March, there have been many rainfall processes in the middle and lower reaches of the Yangtze River. The humidity in the field is high and some fields have accumulated water. Especially since the beginning of April, there have been more than three rainfall processes, with large rainfall, long rain period and wide range. The meteorological department predicted that there will be a significant rainfall process in late April. At present, winter wheat in the middle and lower reaches of the Yangtze River is in the stage of heading and flowering, 5-7 days ahead of normal years. The wheat heading and flowering period and the continuous rainy weather “double-face†have adversely affected wheat production. The Ministry of Agriculture's Wheat Experts Steering Group and the National Agricultural Technology Extension Service Center pointed out that it is necessary to focus on prevention and treatment of pests and waterlogging according to the trend of wheat growth and pests, and effectively manage the field management of wheat in the late stage, and strive to capture the harvest of summer grain. . Led Grow Light Kits,Grow Light Kits,Grow Kit With Light,Quantum Board Led Kit Shenzhen Pvison Technology Co., Ltd. , https://www.pvisunggrowlight.com
Guiding opinions on the middle and lower reaches of the Yangtze River
(1) Focusing on the prevention and control of scab, preventing pests and diseases from reducing losses. In the winter and spring, the temperature in the middle and lower reaches of the Yangtze River is high, and the wheat population is too large, which is conducive to the occurrence of disease. In particular, the heading and flowering period encounters continuous rainy weather, which is very suitable for the infection of Fusarium, which may cause a mildew of scab, which will adversely affect the yield and quality of wheat. At the same time, the humidity in the field is large, powdery mildew and sheath blight are re-emerged, and the "white spike" phenomenon occurs in some field wheat. It is necessary to adhere to the prevention and control strategy of "prevention first, active attack", focusing on the prevention and control of scab, generally twice, the first time in the first to the flowering, the second time in the first 7 days after the first dose about. The wheat fields that have been controlled once and for all have to seize the opportunity of rain and turn fine, and then prevent them once again. At the same time, do a good job of the rule of wheat powdery mildew, sheath blight and other diseases, reduce the loss of wheat yield, and achieve "infested food."
(2) Focusing on clearing the ditch and promoting the growth of the grain. The physiological activity of wheat heading and flowering stage is strong, which is the key period that determines the fertility of Yinghua. Continued rainy weather affects the synthesis of dry matter and nutrient supply, which will have a certain impact on the development of florets. At the same time, the rain and the high humidity of the air during the flowering period may cause the pollen grains to swell and rupture, which affects the pollination and fertilization of the wheat, and thus affects the formation of the number of kernels. "Wheat Sandaogou, from the species to the collection." It is necessary to continue to do a good job of clearing the ditch and clearing the waterlogging. For the wheat fields with low quality of rice straw and cornices, it is necessary to check the smoothness of the "three ditch" in the wheat field. It is strictly forbidden that the water level in the outer ditch is higher than the inner ditch. Timely clean up the silt in the inner trench, strive to do rain to stop the field, reduce the humidity of the wheat field, reduce the occurrence of waterlogging, enhance the vitality of the root system, promote the coordinated growth of wheat above and below ground, and normal flowering and fruiting.
(3) Focusing on “one spray and three defenses†to prevent premature aging and increase grain weight. The continuous rainfall makes the water in the wheat field with low quality of the ditch, especially in the rice field, causing waterlogging, reducing the root activity and affecting the root absorption function. In addition, the lack of light in continuous rainy weather, reducing the photosynthetic capacity of the leaves, may lead to early premature senescence of wheat, affecting grain filling and 1000-grain weight formation. It is necessary to earnestly implement the key technical measures of "one spray and three defenses" and increase the number of spray prevention operations appropriately, which can be increased from 1-2 times to 2-3 times. In the middle and late grouting, 1-2 times of potassium dihydrogen phosphate can be sprayed to prevent premature aging, promote grain filling and increase 1000-grain weight.
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