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1. Seeing the growth of the object and the application of the leaf color application The application of the fertilizer can not be done "one size fits all", depending on the growth and leaf color of the winter crop. 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 soil fertility situation. Apply the plots with high fertility and bottom fertilizer, and apply less or no fertilizer; increase the application of phosphorus and potassium fertilizer to plots with low fertility and low base fertilizer or plots without base fertilizer; The application of chemical fertilizers should be supplemented with organic fertilizer. 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. Considering the application of 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. Each 667 square meters of field should be applied to the rapeseed line with about 1500 kilograms, combined with cultivating 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 bran fertilizer: It should be applied in the middle and late December, and the seedlings should be mixed with soil, while the weak and late-maturing wheat should be mixed with the appropriate amount of phosphate fertilizer. Generally, every 667 square meters of large field is applied or about 2,500 kilograms of soil fertilizer. 3 Application of green manure fertilizer: 150 kg to 250 kg of ash or a thin layer of pig and cow manure per 667 square meters of field. 4 Application of ramie fertilizer: The application amount should account for about 50% of the annual fertilization amount, about 5,000 kilograms per 667 square meters of field soil and about 2,500 kilograms of pig and cattle septic fertilizer, and it is good.
4. Apply according to weather conditions If the temperature is low, apply delayed manure, compost, pond mud, ash fertilizer or human and animal excrement. 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 kg to 30 kg of ammonium bicarbonate per 667 square meters of field.
5. Reasonable combination of organic fertilizer and chemical fertilizer, such as decomposed pig cow dung, human excrement, fermented pond mud, river mud, Chen brick soil, fire soil ash, cake fertilizer, etc. are all high-quality organic fertilizer, for thin and weak seedlings to be human The manure and nitrogen plus nitrogen fertilizer are the mainstays, and the seedlings are strong and strong; the strong seedlings should be dominated by pond mud and soil. If applying cake fertilizer, it is appropriate to apply 40 kg to 50 kg of 667 square meters of field. Organic fertilizers should be used as wax fertilizers to avoid concentrated application to the roots. When drought is caused, the concentration of fertilizer around the roots of the crops is too high, and reverse osmosis occurs, resulting in physiological water loss, 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.
Winter crops usually include wheat, canola, green manure and castor. How to properly handle the winter crops?
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