Winter wheat area in the middle and lower reaches of the Yangtze River (Hubei, Hunan, Jiangxi, Zhejiang and Shanghai, south of Henan Province, Anhui and Jiangsu provinces south of Huaihe River)
1. Fertilization management principles
(1) The middle and lower reaches of the Yangtze River were warmer in the winter of last year. In many places this spring, there are many rains and snows. The local conditions and seedlings should be used to suppress or slash before the wheat is returned to the green, to protect the cold, to prevent freezing and to promote the transformation of the seedlings. To enhance the ability of wheat to resist drought and keep cold.
(2) According to the soil fertility, the application of base fertilizer, the seedling condition and the soil moisture, the amount of topdressing and irrigation is determined scientifically, and the soil is fertilized by seedlings.
(3) The combination of fertilizer and water management with drought and flood control and pest control. 2. Fertilization advice
(1) Pay close attention to the weather conditions and seedlings before the wheat returns to green, especially the rainfall. If the drought persists, the weather will pick up in the early spring, the soil evaporation will increase, and the wheat seedlings will have early water supply when there is a demand for soil moisture. Pay attention to the temperature change and master the irrigation amount and time.
(2) Comprehensive judgment based on winter frost damage and group situation. If there are more large-scale frozen deaths or serious shortages of the group, the irrigation should be combined as soon as possible, and the green fertilizer should be applied to promote the large-scale springs and ensure the number of panicles.
(3) The production level is below 300 kg/mu, and the urea level is 6~9 kg/mu combined with the irrigation period from the start-up period to the jointing stage; the yield level is 300-400 kg/mu, and the urea is added to the jointing stage and the urea is applied to the jointing stage. Kg/mu and potassium chloride 1~3 kg/mu; production level 400~550 kg/mu, from the period of the body to the jointing stage, combined with irrigation, 12~17 kg/mu of urea and 3~5 kg/mu of potassium chloride; The production level is 550 kg/mu or more. From the start-up period to the jointing stage, combined with irrigation, the urea is applied to 17~20 kg/mu and the potassium chloride is 3~5 kg/mu.
(4) In some areas where trace elements are scarce, it is recommended to combine the “one spray three preventions†and the control of pests and weeds (aphids and scab) to spray trace elements in wheat jointing, booting and filling stages. Fertilization; and in the wheat filling period, 150-200 grams of potassium dihydrogen phosphate plus 0.5 to 1 kg of urea and 50 kg of water for foliar application.
This article URL: Guiding Opinions on Scientific Fertilization Technology in Winter Wheat Region in the Middle and Lower Reaches of the Yangtze River in Spring of 2015
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