Pulse Oximeter,Animal Oximeter,Patient Monitor Surgical Room Equipment Co., Ltd. , http://www.nsmedicalequipments.com
Compound fertilizer is more effective than simple fertilizer, but it has been known to farmers, but how to buy high-quality compound fertilizer to achieve low-efficiency and high-efficiency fertilization purposes, the majority of farmers are still difficult to grasp, combined with the variety of compound fertilizer on the market, a novel name, Packaging fancy, increasing the difficulty of identification. To this end, the majority of farmers need to understand the common sense of using compound fertilizer. First, master the basic production process of compound fertilizer, and it has a guiding role in the selection of compound fertilizer. According to the composition process, the compound fertilizer can be simply divided into potassium chloride type, potassium sulfate type, and potassium nitrate type. Potassium chloride type is the most widely used conventional compound fertilizer with relatively low cost. Potassium sulfate type is a compound fertilizer that avoids chlorine or chlorine sensitive crops. It has strong speciality and moderate cost. Potassium nitrate type is developed in recent years. High-grade compound fertilizer has no side effects on the soil. For example, potassium chloride compound fertilizer may be used for rice, and potassium sulfate compound fertilizer may be used for tea, citrus and vegetables. Citrus, tobacco, etc. can use potassium nitrate compound fertilizer. Second, mastering the classification of high, medium and low concentrations of compound fertilizers is a very necessary common sense for the purchase of compound fertilizers. In addition to the inherent quality of the compound fertilizer, it is determined by the production process. Another important indicator is the content of effective nutrients. Effective nutrients can only be marked by N, P2O5 and K2O. No other nutrient elements are used as nutrient markers (GB15063-94 standard). Some companies that label S and other elements into total nutrients are not standardized and mislead farmers. Effective nutrients ≥ 40% were high-concentration compound fertilizers, 30-40% of effective nutrients were medium concentrations, and 25-30% of effective nutrients were low concentrations. The minimum nutrient standard for three-element compound fertilizer is ≥25%, 20-25% can only produce two-element compound fertilizer, and less than 20% is not allowed by the state to produce products. Therefore, understanding this concept has positive significance for the purchase of compound fertilizer. You can understand the taste of the compound fertilizer by looking at the packaging. Third, the purchase of compound fertilizer can not rely solely on the appearance, particle, color, solubility judgments, but also pay attention to brand effects. Brand is the product of market competition, and excellent products have recognized market effects. At present, in order to cater to the illegal demands of some dealers, certain domestic small businesses are exposed to the appearance of inferior goods as the brand-name products or the appearance of imported products, seriously impairing the legitimate interests of farmers and should be vigilant. For example, sulfur-containing compound fertilizers are frequently sold in the market for the sale of potassium sulfate compound fertilizers and farmers are cheated. In fact, in the real sense, most compound fertilizers contain sulfur. Fourth, the choice of compound fertilizer also varies from time to time due to use. Acid soil, soil with low organic matter content should use alkaline compound fertilizer or organic compound fertilizer, acidic soil compound fertilizer should be selected for alkaline soil, such as humic acid ternary compound fertilizer, and phosphorus-enriched or potassium-rich soil can be used with targeted strong The binary compound fertilizer. Potassium nitrate compound fertilizer can be used during the dry season. In the season of plum season or rainy season, ammonium nitrogen compound fertilizer can be used, and the base fertilizer can use coarse-grained compound fertilizer to facilitate the extension of fertilizer efficiency. Compound fertilizer with small particles can be used for top dressing to accelerate the fertilizer efficiency. In short, the choice or purchase of compound fertilizer should be economic, safe, efficient, and quality-enhancing.