Rice formula fertilization is a relatively scientific method of fertilization at this stage. It has the advantages of reducing fertilizer and increasing yield and improving the quality of rice, and is well received by farmers. According to our practice, there are three things to be aware of when promoting rice formula fertilization.
First, we must pay attention to the index values ​​of nitrogen (nitrogen), phosphorus (phosphorus pentoxide) and potassium (potassium oxide) in the formula fertilizer into the practical amount of fertilizer. For example: 1 mu of land through soil testing, it is known that nitrogen should be applied 8 kg, phosphorus pentoxide 3 kg, potassium oxide 5 kg. How to convert these data into urea, superphosphate, potassium chloride? First, find out the active ingredients of various fertilizers. For example, if the nitrogen content of urea is 46%, it can be calculated according to the following formula: urea (kg) = 8÷46%=17.39 kg. The practical amount of phosphorus and potassium fertilizer is also calculated.
Second, we must pay attention to the amount of nitrogen available in organic fertilizers from the total amount of nitrogen applied, and the owed part is supplemented with nitrogen fertilizer. According to the relevant information, 0.5 kg of nitrogen in safflower is only equivalent to 0.435 kg of nitrogen in fertilizer; 0.5 kg of nitrogen in pig manure is only 0.355 kg of fertilizer nitrogen; 0.5 kg of nitrogen in cow dung It is only equivalent to 0.305 kg of fertilizer nitrogen. If a certain field passes the test, 10 kg of nitrogen should be applied per acre. Now, this field can convert 1000 kilograms of safflower grass per acre. How much nitrogen should be replenished? We know that fresh grass generally contains 0.33% of nitrogen, and the content of 1000 kg of grass is 3.3 kg. The conversion to chemical fertilizer nitrogen is 2.87 kg, indicating that the field needs to be supplemented with 7.31 kg of nitrogen. If it is to apply 16% nitrogen ammonium, it needs 44 kg (7.13÷16%). Phosphorus and potassium can be applied according to actual needs, and it is not necessary to remove phosphorus and potassium in organic fertilizer.
Third, it is necessary to cooperate with the application of micro-fertilizer. Generally, the calcareous paddy fields, the fields around the houses, the fields where the phosphate fertilizer is applied in large quantities, the too many fields of organic fertilizer application, the cold-impregnated muddy fields and the newly-opened yellow mud fields are all zinc-deficient and boron-deficient. Use 1.5-2 kg of zinc sulphate per mu, 250 g of borax, mix with dry and fertile soil to apply base fertilizer, apply once every 2-3 years.
First, we must pay attention to the index values ​​of nitrogen (nitrogen), phosphorus (phosphorus pentoxide) and potassium (potassium oxide) in the formula fertilizer into the practical amount of fertilizer. For example: 1 mu of land through soil testing, it is known that nitrogen should be applied 8 kg, phosphorus pentoxide 3 kg, potassium oxide 5 kg. How to convert these data into urea, superphosphate, potassium chloride? First, find out the active ingredients of various fertilizers. For example, if the nitrogen content of urea is 46%, it can be calculated according to the following formula: urea (kg) = 8÷46%=17.39 kg. The practical amount of phosphorus and potassium fertilizer is also calculated.
Second, we must pay attention to the amount of nitrogen available in organic fertilizers from the total amount of nitrogen applied, and the owed part is supplemented with nitrogen fertilizer. According to the relevant information, 0.5 kg of nitrogen in safflower is only equivalent to 0.435 kg of nitrogen in fertilizer; 0.5 kg of nitrogen in pig manure is only 0.355 kg of fertilizer nitrogen; 0.5 kg of nitrogen in cow dung It is only equivalent to 0.305 kg of fertilizer nitrogen. If a certain field passes the test, 10 kg of nitrogen should be applied per acre. Now, this field can convert 1000 kilograms of safflower grass per acre. How much nitrogen should be replenished? We know that fresh grass generally contains 0.33% of nitrogen, and the content of 1000 kg of grass is 3.3 kg. The conversion to chemical fertilizer nitrogen is 2.87 kg, indicating that the field needs to be supplemented with 7.31 kg of nitrogen. If it is to apply 16% nitrogen ammonium, it needs 44 kg (7.13÷16%). Phosphorus and potassium can be applied according to actual needs, and it is not necessary to remove phosphorus and potassium in organic fertilizer.
Third, it is necessary to cooperate with the application of micro-fertilizer. Generally, the calcareous paddy fields, the fields around the houses, the fields where the phosphate fertilizer is applied in large quantities, the too many fields of organic fertilizer application, the cold-impregnated muddy fields and the newly-opened yellow mud fields are all zinc-deficient and boron-deficient. Use 1.5-2 kg of zinc sulphate per mu, 250 g of borax, mix with dry and fertile soil to apply base fertilizer, apply once every 2-3 years.
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