As soon as the spring ploughing is underway, the farmers’ friends have begun to prepare the fertilizer for spring ploughing. In the face of the variety of fertilizers on the market, farmers’ friends often do not know how to choose. If they can’t choose the right fertilizer, they will save money and not increase their production. The effect may also lead to a reduction in production. With our years of testing the chemical fertilizers, we provide some common sense and suggestions for farmers' reference. LVL (Laminated Veneer Lumber) Door Core Lvl Board,Lvl Bed Slat,Lvl Scaffold Board,Laminated Veneer Lumber Fushi Wood Co., Ltd. , http://www.sgplywood.com
1. Compound fertilizer ( composite fertilizer ) :
Compound fertilizers ( composite fertilizers ) include compound fertilizers, compound fertilizers, blended fertilizers, and organic - inorganic compound fertilizers. It refers to a fertilizer made of chemical, blending or dry mixing methods with at least two nutrients, mainly nitrogen, phosphorus and potassium. The type is divided into three-component fertilizer and two-component fertilizer according to the elements contained. The compound fertilizer mainly composed of nitrogen, phosphorus and potassium is called ternary fertilizer, and only two of them are called binary fertilizer, and there are nitrogen and phosphate fertilizers. , phosphorus, potassium fertilizer, nitrogen, potassium fertilizer three. According to the concentration, it can be divided into high concentration ( nitrogen, phosphorus, potassium total content ≥ 40.0%) , medium concentration ( nitrogen, phosphorus, potassium total content ≥ 30.0%) , low concentration ( nitrogen, phosphorus, potassium total content ≥ 25.0%) .
Points to note when purchasing compound fertilizers:
1. Pay attention to the content of the label, see if it is a binary fertilizer or a ternary fertilizer, what is the concentration? For each additional nutrient content, the price is different;
2 , look at the existence of the three elements of nutrients. The potassium sulphate type fertilizer is suitable for the saline-alkali land in the northwest region, which is beneficial to the improvement of the soil, and is also suitable for avoiding chlorine crops such as vegetables, fruits and fruits. Fertilizers with nitrate nitrogen are suitable for topdressing. Fertilizers containing strontium-soluble phosphorus are not suitable for soils in the northwestern region. In particular, saline-alkali soils in the Hexi region will result in reduced or no harvest, because strontium-soluble phosphorus can only be dissolved in weakly acidic soils. Don't be tempted to be cheap;
3 , chlorine-containing fertilizer ( labeled on the bag containing chlorine or Cl-) is not suitable for chlorine crops. Some plants are very sensitive to chloride ions. When the absorption reaches a certain level, it will obviously affect the yield and quality. When there are more chloride ions, it is not conducive to the conversion of sugar to starch. The starch content of root and tuber crops will decrease, and the chloride ion can promote Hydrolysis of carbohydrates, so potatoes, watermelons, grapes, beets, apples, cabbage, peppers, lettuce, tobacco, etc. are not suitable for the use of chlorine-containing fertilizers;
4 , pay attention to the nutrient labeling form, the total nutrient refers to the sum of the three elements of nitrogen, phosphorus, potassium, some manufacturers add organic matter or calcium, magnesium, sulfur and other medium elements are not right, this fertilizer quality may have problem. For single nutrient content, N-P2O5-K2O ( total nitrogen - effective phosphorus pentoxide - potassium oxide ) , such as fertilizer labeled 15-10-0 , means 15% nitrogen and 10% phosphorus . A low concentration binary fertilizer containing potassium.
Second, organic - inorganic compound fertilizer:
The organic fertilizer is mainly composed of organic matter and has low nutrient content, which can mainly improve soil and improve the quality of fruits and vegetables. Organic - inorganic compound fertilizer refers to a compound fertilizer containing a certain amount of organic matter, which can not only improve the soil and crop quality, but also provide a certain amount of inorganic nutrients.
Please be aware of:
1. These two fertilizers are generally acidic, so try not to use them at the same time as alkaline fertilizers.
2 , slow fertilizer effect, not easy to do topdressing.
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