What's the difference between chemical fertilizer used for rice and chemical fertilizer used for growing vegetables?

What's the difference between chemical fertilizer for rice and chemical fertilizer for growing vegetables? The main difference is that they need different kinds and quantities of nutrients in the process of growth and development. Below I will talk in detail about the reasons why the chemical fertilizer used for rice is different from that used for growing vegetables.

I. Nutrients Necessary for Crop Growth

As we all know, the normal growth and development of crops need 16 kinds of nutrients, whether it is rice or vegetables. Carbon, hydrogen, oxygen, nitrogen, phosphorus, potassium, calcium, magnesium, sulfur, iron, zinc, manganese, copper, molybdenum, boron and chlorine. Carbon, hydrogen and oxygen can be obtained directly from the air, and we don't need to supplement them. Among the other 13 nutrients, the demand for nitrogen, phosphorus and potassium is the largest, which we call macro elements; Calcium, magnesium and sulfur take the second place, which are called weight elements; The remaining seven requirements are at least called trace elements. If the content of these nutrients in the soil is insufficient, we need to supplement them artificially.

Among these nutrients, large demand is not important, and small demand is not important. They are equally important for the normal growth and development of crops, and the difference lies in the size of demand. Without any of them, crops cannot grow and develop normally. Therefore, in the actual fertilization process, we should correct the concept of only paying attention to the application of nitrogen, phosphorus and potassium, and balance the nutritional elements needed by crops.

Second, different crops need different kinds and quantities of nutrients.

Different crops have different kinds and demands for nutrient elements. Take the demand of potatoes in rice and vegetables for nitrogen, phosphorus and potassium as an example. The research shows that for every 100kg of rice production, it needs to absorb about 2 kg of pure nitrogen (N), about 1kg of phosphorus (P2O5) and about 2.5 kg of potassium (K2O), and the amount of fertilization should be different with different soil fertility. Every 100kg of potato needs to absorb about 0.5kg (nitrogen), 0.2kg of phosphorus (P2O5) and 0.5kg of potassium (K2O nitrogen).

From the above comparison, it can be seen that the demand for nutrients is different for the production of the same amount of rice and potatoes, which in turn guides us to supplement nutrients according to the variety of crops and the demand law of nutrients in actual planting.

In addition to different requirements for nutrients, different crops have different requirements for nutrients. For example, rice is sensitive to zinc and boron, while potatoes are sensitive to boron, copper, iron and magnesium.

Third, the existing forms of nutrients.

As mentioned earlier, if the demand for nutrients by crops comes from insufficient soil, it needs to be supplemented manually. In production, we call this part of artificially supplemented nutrients fertilizer, including organic fertilizer and chemical fertilizer.

The nutrient content of organic fertilizer is relatively low, generally the content of a single nutrient element is only a few percentage points or even less, but the nutrients in organic fertilizer are comprehensive, and because it contains organic matter, it can improve soil fertility. Therefore, in the actual fertilization, we must not ignore the improvement effect of organic fertilizer on soil, especially in the current situation that the soil environment is generally deteriorating.

Because the nutrient content in organic fertilizer is relatively low, it is unrealistic to meet the nutrient demand of crops simply by applying organic fertilizer, and the amount of organic fertilizer needed is amazing. Therefore, the important task of supplementing essential nutrients for crops falls on chemical fertilizers.

The nutrient content in chemical fertilizer is relatively high. Take our common ternary fertilizer as an example. The nitrogen content of urea is 46%, the available phosphorus content of calcium superphosphate is about 14%~20%, and the potassium oxide content of potassium chloride is about 60%, which is higher than that of organic fertilizer, so the application amount required for crop growth is relatively small.

Summary: From the above analysis, we can know that if rice or vegetables want to grow and develop normally, they must have enough nutrition. When they cannot be completely obtained from nature, they need artificial supplementation. The main carrier of artificial supplement is chemical fertilizer, and because chemical fertilizer and vegetables have different requirements for nutrients, we need to apply different amounts and types. In short, a principle to be grasped in fertilization is to fertilize according to the needs of crop growth.