Compound fertilizer has the advantages of high nutrient content, less auxiliary components and good physical properties. It plays an important role in balanced fertilization, improving fertilizer utilization rate and promoting high yield and stable yield of crops. But it also has some shortcomings, such as its nutrient ratio is always fixed, and the types, quantities and proportions of nutrients required for different soils and different crops are diverse. Therefore, it is best to conduct soil testing before use to understand the texture and nutritional status of the soil in the field, and also pay attention to the application with unit fertilizer to get better results.
With the increase in grain yield, the phenomenon of soil deficiency has been demonstrated, and farmers are now beginning to use more compound fertilizers.
At present, the development of compound fertilizer has three major trends: the first is the specialization of multiple varieties. Different crops have different special fertilizers, and special fertilizers are developed according to the law of crop growth and development and the amount of fertilizer absorbed. When selecting compound fertilizer, farmers should choose the corresponding special fertilizer according to different crops. If it is not special, it will violate the law of crop absorption, so that the potential for crop yield increase will not be realized, and some nutrients will be wasted. The second is multi-functional medicinalization. The combination of pesticides and fertilizers eliminates the pesticide dressing procedure. Once applied, it can ensure the nutrients needed for crops and prevent underground pests and seedling diseases, which can have multiple effects. The third is long-term high concentration. With the development of agricultural production, high-concentration and long-acting compound fertilizer is more and more popular among farmers. The application of this type of fertilizer reduces the amount of fertilization, facilitates farming, eliminates the problem of topdressing, reduces labor and improves fertilizer utilization. Rate, labor saving, labor saving, time saving, quality improvement and efficiency.
To be combined with a variety of fertilizers Although most of the compound fertilizers are now diverse, they still cannot completely replace organic fertilizers. Where conditions permit, the application amount of decomposed organic fertilizers should be increased as much as possible. Compound fertilizer combined with organic fertilizer can improve fertilizer efficiency and nutrient utilization. The application of organic fertilizer not only improves the soil, activates beneficial microorganisms in the soil, but more importantly saves energy and reduces environmental pollution. The use of some bio-organic fertilizers not only eliminates the cumbersome process of traditionally making organic fertilizers, but also provides a large number of beneficial microorganisms for the soil, activates soil nutrients, and reduces continuous cropping obstacles.
Although some special compound fertilizers have determined the appropriate nutrient distribution ratio according to the fertilizer characteristics of the crops and the fertilization characteristics of the soil, it is difficult to fully meet the requirements of actual crop growth on the soil at different fertility levels. Therefore, it is necessary to Growth conditions, combined with the use of some single fertilizer. For example, in the nitrogen-deficient soil, some nitrogen fertilizer should be used for the leafy vegetables that need more nitrogen, and some potassium fertilizer should be used in the potassium-deficient soil for the later potassium.
Grasping the characteristics of compound fertilizer, the application of compound fertilizer is effective, and it should be used as base fertilizer. A large number of tests have shown that both binary and ternary compound fertilizers are better based on basic application. This is because the compound fertilizer contains various nutrients such as nitrogen, phosphorus and potassium. The crop is particularly sensitive to phosphorus and potassium in the early stage, and it is required that the phosphorus and potassium fertilizers should be used as the base fertilizer. The controlled release compound fertilizer adopts the processes of coating and granulation in the production process. The fertilizer efficiency is slow and stable, slower than the decomposition of the single chemical fertilizer, less nutrient leaching, high utilization rate, and suitable for the base fertilizer. The average amount of mu is 30 to 40 kg. Compound fertilizer should not be used for seedling fertilizer and mid-late fertilizer to prevent greed.
The decomposition of compound fertilizer is slow. For crops that use compound fertilizer as base fertilizer during sowing, according to the fertilizer requirement of different crops, quick-acting nitrogen fertilizer should be supplemented in time for topdressing to meet the nutritional needs of crops.
The concentration of compound fertilizer is quite different, so we should pay attention to choose the right concentration. At present, most compound fertilizers are configured according to the average nutrient status of soil types in a certain region and the proportion of fertilizer required for large crops. There are high, medium and low concentration series of compound fertilizers on the market. Generally, the total concentration of total nutrients is between 25% and 30%, the medium concentration is between 30% and 40%, and the high concentration is above 40%. It is necessary to use economical and efficient compound fertilizers due to different regions, soils and crops. Generally, high-concentration compound fertilizer is used in economic crops, with excellent quality, less residue and high utilization rate.
The concentration of compound fertilizer is high, and it is necessary to avoid direct contact between seeds and fertilizer. The compound fertilizer has a high nutrient content. If it is in direct contact with the seed or seedling roots, it will affect the emergence of seedlings and even the burning of seedlings and rotten roots. When planting, the seeds should be separated from the point application and the compound fertilizer by 5 to 10 cm. It should not be directly applied to the same point with the seeds, causing fat damage.
Compound fertilizers are different from raw materials, and attention should be paid to the use of nutrients. Different brands and different concentrations of compound fertilizers use different raw materials, and the production should be selected according to soil type and crop type. Nitrate-containing compound fertilizer should not be used in leafy vegetables and paddy fields; compound fertilizer containing ammonium ions should not be applied on saline-alkali soil; compound fertilizer containing potassium chloride or chloride ion should not be used on chlorine-free crops or saline-alkali soil; Compound fertilizer containing potassium sulfate is not suitable for application in paddy fields and acidic soils. Otherwise, it will reduce fertilizer efficiency and even poison crops.
The compound fertilizer contains two or more kinds of elements, the nitrogen table is easy to volatilize or the rain water is lost, and the phosphorus and potassium are easily fixed by the soil, especially the phosphorus is less mobile in the soil, and the surface is not easily absorbed and utilized by the crop roots. It is also not conducive to the deep rooting of the roots. In the case of drought, the fertilizer cannot be dissolved and the fertilizer efficiency is even worse. Therefore, the application of compound fertilizer should avoid the application of the surface as much as possible, and the soil should be applied deeply.
Proper use of compound fertilizer will bring us good returns. In addition, when choosing compound fertilizer, you should also pay attention to the nutrients contained in it, as well as packaging and manufacturers, beware of being deceived.
ã€Comment】 ã€Print this article】 ã€Close this page】 ã€Large, medium and small】
Faucet
Brass Shower Faucet,Spring Pull Down Faucet,Kitchen Sink Taps,Kitchen Mixer Tap
Zhejiang minmetals huitong import and export Co., Ltd , https://www.zjminmetals.com