First, let's talk about why rice fertilizer is not recommended.
Compound fertilizer, as everyone knows, contains more than two kinds of fertilizer, in the process of farming and fertilizing farmers to save a lot of trouble, can be said to be very convenient. Once a fertilizer is added, a variety of nutrients are added. But any fertilizer is not perfect, the nutrient composition of the compound fertilizer is fixed, the proportion above can not move.
But in the process of rice growth, the absorption of various elements fertilizers is not the same, the proportion is also very poor, especially the absorption of potassium fertilizer, nitrogen, phosphorus and potassium fertilizer absorption ratio is generally 2:1:3. And the response time of rice is slower. Therefore, compound fertilizer with relatively fixed composition can not meet the demand for fertilizer. So it is not very recommended for growers to use compound fertilizers.
If you really want to use compound fertilizer, you can consider the use of rice-specific compound fertilizer, rice-specific compound fertilizer is mainly produced according to the characteristics of rice demand for fertilizers. Generally, the special compound fertilizer for rice is mainly used as rice base fertilizer. According to the soil fertility, the amount of compound fertilizer per mu is about 25 kg.
Let's talk about the use of ordinary compound fertilizers.
When using common formula compound fertilizer, fertilization should be combined with soil testing formula. In addition, local soil fertilizer situation and rice yield should be considered comprehensively.
In addition, compound fertilizer is generally used as base fertilizer, not recommended as topdressing, otherwise it is a waste of fertilizer. It is not recommended to use phosphoric acid two amine to select potassium chloride compound fertilizer and nitrogen, phosphorus and potassium compound fertilizer. Generally, the use of compound fertilizer rice in deep ploughing before the base fertilizer into the paddy field, the general amount of fertilization per mu of land in about 15 kg.
Three use of fertilizer
It is highly recommended to use nitrogen, phosphorus and potassium to fertilize three fertilizers. We should apply fertilizer reasonably according to the local conditions, and the soil conditions in each area are different, so we can not completely copy the fertilization strategy of other areas.
First, sufficient base fertilizer must be applied, and organic fertilizer and chemical fertilizer should be used better. In general, about 40% nitrogen fertilizer, all phosphate fertilizer and 60% potash fertilizer are used as base fertilizer. Another 30% of nitrogen fertilizer is used for fertilizer. The remaining 30% nitrogen and 40% potash fertilizer can be used as spike fertilizer.
