Right now, it is the best time to prepare fertilizer for fertilization in autumn. According to the local conditions, according to the requirements of balanced fertilization of autumn-sown crops, it is a key measure to control the quality and high yield of autumn-sown crops. The following technical points should be mastered in the preparation of fertilizer for autumn-sown crops:
Comprehensively increase the application of organic fertilizer per mu to ensure the application of organic fertilizer more than 1500 kg, to achieve the combination of land and land, fertile soil to increase production and two benefits. It should be noted that organic fertilizer should be fully piled and decomposed before application.
Scientific application of chemical nitrogen fertilizer according to local conditions Currently, the commonly used chemical nitrogen fertilizer varieties are mainly ammonium bicarbonate, urea, ammonium chloride and the like. However, it should be noted that ammonium nitrogen fertilizers such as ammonium bicarbonate, ammonium sulfate, ammonium chloride and ammonium phosphate should not be mixed with alkaline fertilizers such as calcium magnesium phosphate, grass ash and lime, otherwise ammonia volatilization will occur and the fertilizer effect will be reduced; Do not put the fertilizer directly into the seed when controlling the fertilizer, and control the amount of fertilization, no more than 2.5 kg per mu. Because urea contains biuret, the concentration is too high, the seed will be poisoned, affecting the seed germination; ammonium bicarbonate should not be applied to the soil surface too For a long time, avoid shallow application, immediately after application, cover soil or appropriate deep application, because the nature of ammonium bicarbonate is extremely unstable, it is easy to volatilize, so that nutrients are lost; all nitrogen fertilizer should be combined with phosphorus and potassium fertilizer.
Proper selection of potassium dihydrogen phosphate Potassium dihydrogen phosphate is a high-concentration, high-concentration and high-quality phosphorus and potassium high-efficiency compound fertilizer, which is commonly applied to autumn-sown crops such as wheat and rape. Potassium dihydrogen phosphate can be used as a base fertilizer or as a top dressing. When using the base fertilizer, the amount of 7.5-10 kg per acre of autumn-sown crops is applied with nitrogen fertilizer; the topdressing is mainly carried out by spraying, from the seedling stage to the middle and late growth stages, and the spraying concentration is 0.4%-0.5%. That is, every 50 kg of water is 0.2-0.25 kg of potassium dihydrogen phosphate, and it is required to be dissolved sufficiently, and it can be used with the seedlings, and the spraying times can be mastered according to the condition of the seedlings, and the spraying can be carried out 2-3 times.
Use special compound (mixed) fertilizer special compound (mixed) fertilizer to contain various nutrients such as nitrogen, phosphorus, potassium, micro, etc. needed for crop growth, compared with elemental fertilizer or customary fertilization, increase production by up to 10%-15 %. Become the preferred fertilizer in autumn production.
Targeted application of high-quality micro-fertilizers such as boron, molybdenum, zinc, etc. In the autumn-sown crops, rapeseed, fruit trees, etc. belong to the favorite boron crop, which is very sensitive to boron. Although the amount of crops required is very small, it is generally accepted to have the effect of “finishing the finishing touch†and “adding flowers to the brocade†after application. Fertilizers such as rapeseed and fruit trees are generally applied by base application, 0.5-1 kg per mu, and can also be sprayed with foliar surface, 0.1-0.2 kg of boron fertilizer, 40-50 kg of water, and molybdenum.
Comprehensively increase the application of organic fertilizer per mu to ensure the application of organic fertilizer more than 1500 kg, to achieve the combination of land and land, fertile soil to increase production and two benefits. It should be noted that organic fertilizer should be fully piled and decomposed before application.
Scientific application of chemical nitrogen fertilizer according to local conditions Currently, the commonly used chemical nitrogen fertilizer varieties are mainly ammonium bicarbonate, urea, ammonium chloride and the like. However, it should be noted that ammonium nitrogen fertilizers such as ammonium bicarbonate, ammonium sulfate, ammonium chloride and ammonium phosphate should not be mixed with alkaline fertilizers such as calcium magnesium phosphate, grass ash and lime, otherwise ammonia volatilization will occur and the fertilizer effect will be reduced; Do not put the fertilizer directly into the seed when controlling the fertilizer, and control the amount of fertilization, no more than 2.5 kg per mu. Because urea contains biuret, the concentration is too high, the seed will be poisoned, affecting the seed germination; ammonium bicarbonate should not be applied to the soil surface too For a long time, avoid shallow application, immediately after application, cover soil or appropriate deep application, because the nature of ammonium bicarbonate is extremely unstable, it is easy to volatilize, so that nutrients are lost; all nitrogen fertilizer should be combined with phosphorus and potassium fertilizer.
Proper selection of potassium dihydrogen phosphate Potassium dihydrogen phosphate is a high-concentration, high-concentration and high-quality phosphorus and potassium high-efficiency compound fertilizer, which is commonly applied to autumn-sown crops such as wheat and rape. Potassium dihydrogen phosphate can be used as a base fertilizer or as a top dressing. When using the base fertilizer, the amount of 7.5-10 kg per acre of autumn-sown crops is applied with nitrogen fertilizer; the topdressing is mainly carried out by spraying, from the seedling stage to the middle and late growth stages, and the spraying concentration is 0.4%-0.5%. That is, every 50 kg of water is 0.2-0.25 kg of potassium dihydrogen phosphate, and it is required to be dissolved sufficiently, and it can be used with the seedlings, and the spraying times can be mastered according to the condition of the seedlings, and the spraying can be carried out 2-3 times.
Use special compound (mixed) fertilizer special compound (mixed) fertilizer to contain various nutrients such as nitrogen, phosphorus, potassium, micro, etc. needed for crop growth, compared with elemental fertilizer or customary fertilization, increase production by up to 10%-15 %. Become the preferred fertilizer in autumn production.
Targeted application of high-quality micro-fertilizers such as boron, molybdenum, zinc, etc. In the autumn-sown crops, rapeseed, fruit trees, etc. belong to the favorite boron crop, which is very sensitive to boron. Although the amount of crops required is very small, it is generally accepted to have the effect of “finishing the finishing touch†and “adding flowers to the brocade†after application. Fertilizers such as rapeseed and fruit trees are generally applied by base application, 0.5-1 kg per mu, and can also be sprayed with foliar surface, 0.1-0.2 kg of boron fertilizer, 40-50 kg of water, and molybdenum.
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