Recently, many types of compound fertilizers appearing on the market are mainly mixed according to the proportion of crops that require nitrogen, phosphorus and potassium. There are special compound fertilizer for citrus, special compound fertilizer for leeks, special compound fertilizer for cotton, special compound fertilizer for rice, compound fertilizer for juice cane, compound fertilizer for vegetables, and compound fertilizer for lawn.
Compound fertilizers can be divided into 10 major categories. The first category is inorganic compound fertilizer. That is, inorganic chemical fertilizers are prepared by physical or chemical methods containing nitrogen, phosphorus, potassium or two kinds of nutrients. The second category is organic-inorganic compound fertilizer. That is, the inorganic compound fertilizer is added with a large amount of organic matter such as cake fertilizer, bone powder, animal waste, peat and the like. The third category is a compound fertilizer containing trace elements. Recently, many manufacturers have indicated trace elements such as boron and zinc. The fourth category is a rare earth-containing compound fertilizer. Refers to a compound fertilizer containing certain rare earths, such as rare earth ammonium bicarbonate. The fifth category is spray application of compound fertilizer. Divided into two major categories of powders and liquids, containing a certain amount of nitrogen, phosphorus, potassium and trace elements, which require higher water solubility, less than 5% of insolubles. The sixth category is liquid compound fertilizer. Such products are widely used in Europe and the United States, mainly using liquid fertilisers or irrigation systems for root fertilization. The seventh category is a compound fertilizer containing microorganisms, which mainly refers to the addition of various strains to organic-inorganic compound fertilizers. The eighth category is compound fertilizers containing pesticides. Refers to a compound fertilizer containing a certain amount of pesticides, mainly containing herbicides. The ninth category is a compound fertilizer containing humic acid. Humic acid has a certain stimulating effect on plant root growth, but because of its relatively high price, there are not many manufacturers of humic acid added to compound fertilizer. Class B is other compound fertilizers. For example, magnetized fertilizer mainly refers to the magnetization of compound fertilizer through special magnetization device, and the total nutrient content is greatly reduced, and its fertilizer efficiency is currently difficult to determine.
Due to its complete nutrients and high content, compound fertilizers can increase the yield and quality of crops, and are more and more popular among users. The following points should be mastered when applying:
First, it is suitable for base fertilizer. The critical period for the absorption of phosphorus and potassium by crops is generally in the early stage, while the mobility of phosphorus and potassium in the soil is small, and the compound fertilizer is better as the base fertilizer. According to data research, in the case of single nitrogen fertilizer for cropping in the growth period of crops, most crops are better when applying compound fertilizer: the base fertilizer is better; if it is not matched with elemental nitrogen fertilizer for topdressing during the growth period, 75% The compound fertilizer is used as the base fertilizer, and the other 25% is applied, or the base fertilizer and the top dressing are better.
The second is to look at soil application. Different compound fertilizers should be applied according to the deficiency of the soil and the demand for fertilizer from different crops. For example, soils lacking nitrogen and phosphorus, nitrogen and phosphorus compound fertilizers; red soils deficient in phosphorus and potassium, old alluvial yellow soil, phosphorus and potassium compound fertilizers; if soil three elements are lacking, nitrogen, phosphorus and potassium may be used. Mixed fertilizer. In addition, crops such as potato, watermelon, sugar cane, tea tree, and grape should be less compounded with chloride ions.
The third is to master different methods of application. The viscous soil aggregate structure is poor, but the water retention and fertilizer retention performance is good, it is not easy to leak, and should be applied deeply; while the sandy soil and the water leakage field have poor water retention and fertilizer retention performance, and should be applied shallowly. The ammonia nitrogen compound fertilizer is volatile and should be covered after application. Compound fertilizer containing phosphorus and potassium, because phosphorus is easily fixed by soil, should be applied near the root of the crop to facilitate crop absorption. For cereal crops such as rice and wheat, and for spreading crops with developed roots, the compound fertilizer can be applied by full-layer fertilization method, that is, first applied to the surface layer, and then cultivated into the soil of the cultivated layer; crops such as corn and cotton should be applied; It is best to use concentrated fertilization methods for crops such as tea and fruit trees to improve the utilization rate of fertilizers.
Compound fertilizers can be divided into 10 major categories. The first category is inorganic compound fertilizer. That is, inorganic chemical fertilizers are prepared by physical or chemical methods containing nitrogen, phosphorus, potassium or two kinds of nutrients. The second category is organic-inorganic compound fertilizer. That is, the inorganic compound fertilizer is added with a large amount of organic matter such as cake fertilizer, bone powder, animal waste, peat and the like. The third category is a compound fertilizer containing trace elements. Recently, many manufacturers have indicated trace elements such as boron and zinc. The fourth category is a rare earth-containing compound fertilizer. Refers to a compound fertilizer containing certain rare earths, such as rare earth ammonium bicarbonate. The fifth category is spray application of compound fertilizer. Divided into two major categories of powders and liquids, containing a certain amount of nitrogen, phosphorus, potassium and trace elements, which require higher water solubility, less than 5% of insolubles. The sixth category is liquid compound fertilizer. Such products are widely used in Europe and the United States, mainly using liquid fertilisers or irrigation systems for root fertilization. The seventh category is a compound fertilizer containing microorganisms, which mainly refers to the addition of various strains to organic-inorganic compound fertilizers. The eighth category is compound fertilizers containing pesticides. Refers to a compound fertilizer containing a certain amount of pesticides, mainly containing herbicides. The ninth category is a compound fertilizer containing humic acid. Humic acid has a certain stimulating effect on plant root growth, but because of its relatively high price, there are not many manufacturers of humic acid added to compound fertilizer. Class B is other compound fertilizers. For example, magnetized fertilizer mainly refers to the magnetization of compound fertilizer through special magnetization device, and the total nutrient content is greatly reduced, and its fertilizer efficiency is currently difficult to determine.
Due to its complete nutrients and high content, compound fertilizers can increase the yield and quality of crops, and are more and more popular among users. The following points should be mastered when applying:
First, it is suitable for base fertilizer. The critical period for the absorption of phosphorus and potassium by crops is generally in the early stage, while the mobility of phosphorus and potassium in the soil is small, and the compound fertilizer is better as the base fertilizer. According to data research, in the case of single nitrogen fertilizer for cropping in the growth period of crops, most crops are better when applying compound fertilizer: the base fertilizer is better; if it is not matched with elemental nitrogen fertilizer for topdressing during the growth period, 75% The compound fertilizer is used as the base fertilizer, and the other 25% is applied, or the base fertilizer and the top dressing are better.
The second is to look at soil application. Different compound fertilizers should be applied according to the deficiency of the soil and the demand for fertilizer from different crops. For example, soils lacking nitrogen and phosphorus, nitrogen and phosphorus compound fertilizers; red soils deficient in phosphorus and potassium, old alluvial yellow soil, phosphorus and potassium compound fertilizers; if soil three elements are lacking, nitrogen, phosphorus and potassium may be used. Mixed fertilizer. In addition, crops such as potato, watermelon, sugar cane, tea tree, and grape should be less compounded with chloride ions.
The third is to master different methods of application. The viscous soil aggregate structure is poor, but the water retention and fertilizer retention performance is good, it is not easy to leak, and should be applied deeply; while the sandy soil and the water leakage field have poor water retention and fertilizer retention performance, and should be applied shallowly. The ammonia nitrogen compound fertilizer is volatile and should be covered after application. Compound fertilizer containing phosphorus and potassium, because phosphorus is easily fixed by soil, should be applied near the root of the crop to facilitate crop absorption. For cereal crops such as rice and wheat, and for spreading crops with developed roots, the compound fertilizer can be applied by full-layer fertilization method, that is, first applied to the surface layer, and then cultivated into the soil of the cultivated layer; crops such as corn and cotton should be applied; It is best to use concentrated fertilization methods for crops such as tea and fruit trees to improve the utilization rate of fertilizers.
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