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1. Apply according to crop growth and leaf color. Shira fertilizer can't be "one size fits all", depending on the growth and leaf color of winter crops. The leaves of the green color of the long seedlings should not be applied to the fertilizer, the leaves of the green and strong seedlings should be less or not applied to the fertilizer, the thin yellow and green thin seedlings should be applied to the fertilizer.
2. See the application of soil fertility. For plots with high fertility and low fat feet, less or no fertilization may be applied; for plots with low fertility and low base fertilizer, and for plots without base fertilizer, phosphorus and potassium fertilizers should be added; for plots with single application of fertilizers per year Apply organic fertilizer.
In addition, do not indiscriminately apply fertilizer to prevent crops from growing in the spring, causing winter crops to fall or greedy and ripening to reduce production. The application of wax fertilizer in sandy soil should be carried out in small amounts to prevent loss of fertilizer leaching.
3. Consider the application of the species. The application of wax fertilizer must vary from crop to crop.
(1) Application of rapeseed fertilizer: The manure and phosphorus fertilizer should be mixed and rotted, and about 1,500 kilograms per acre of field should be applied to the rapeseed line, combined with the cultivation of earthworms, and applied from late December to early January. Early-maturing rapeseed varieties should be applied earlier than late-maturing rapeseed varieties because of the early spring.
(2) Application of wheat wax fertilizer: It should be applied in the middle and late December, and the strong seedlings should be mixed with soil, while the weak and late-maturing wheat should be mixed with appropriate amount of phosphate fertilizer in the soil fertilizer, generally per acre of field. The application or application of soil fertilizer is about 2,500 kg.
(3) Application of green manure and fertilizer: 150-250 kg of ash or a thin layer of pig and cow manure per acre.
(4) Application of ramie fertilizer: the application amount should account for about 50% of the annual fertilization amount, about 5,000 kg of soil per mu in the field and about 2,500 kg of pig and cow manure, and apply before the frost. it is good.
4. Apply according to weather conditions. If the temperature is low, the delayed manure, compost, pond mud, gray fertilizer or human and animal excrement will be applied. When the temperature is high, grab the sunny day and apply fertilizers such as urea, ammonium chloride and ammonium bicarbonate that are easily decomposed. Under low temperature conditions, ammonium bicarbonate volatilizes less, and it can be quickly absorbed and utilized by wintering crops, and the loss of fertilizer is less. At the same time, ammonium bicarbonate is cheaper than urea. Wheat and rapeseed are applied to 25-30 kg of ammonium bicarbonate per acre of field.
5, organic fertilizer and fertilizer mix. Such as decomposed pig cow dung, human excrement, fermented pond mud, river mud, Chen brick soil, fire soil ash, cake fertilizer, etc. are high-quality organic fertilizer, for the thin and weak seedlings should be based on human excrement and nitrogen fertilizer To promote the strong and strong seedlings; for the strong seedlings should be based on pond mud, soil and fertilizer.
If applying cake fertilizer, 40-50 kg per acre of field should be applied, and organic fertilizer is used as wax fertilizer. It should be avoided to concentrate on the roots to prevent the physiological concentration of water due to the high concentration of fertilizer around the roots of the crops during the drought, resulting in dead crops in winter crops. In the case of drought after application of wax fertilizer, it should be combined with watering and drought resistance, and water fertilization, the effect is better.
Source: Guangzhou Agricultural Information Express
Winter crops usually include wheat, canola, green manure and castor. How to properly handle the winter crops?
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