Ratio of base fertilizer to rice

In the process of rice planting, in order to achieve high yield, fertilizers should be applied accurately at each stage. In order to create good soil conditions for the growth and development of rice, the application of base fertilizer is necessary. What is the ratio of base fertilizer for rice?

I. ratio of base fertilizer to rice

Rice base fertilizer should be based on phosphorus, nitrogen and potassium should be applied together, phosphorus should be applied at one time, phosphorus can not be moved in the soil, topdressing phosphate fertilizer will not have an effect. The biggest effect of phosphate fertilizer is that the whole layer and root system should be applied, that is, one day before transplanting, 125-150 g / m2 of diammonium phosphate should be sprinkled in the seedbed.

The amount of phosphate fertilizer in the base fertilizer is 35-50 kg / ha. The amount of nitrogen fertilizer: 35-40 kg / ha. The amount of potash fertilizer: 45-60 kg / ha.

To increase the application of medium and trace element fertilizers, 100-150 kg of calcium and magnesium fertilizer (commercial quantity) and 20 kg / ha of zinc fertilizer (21% pure zinc) can be applied.

Second, the function of base fertilizer

1. The application of base fertilizer can improve the soil. The application of organic manure such as pig and cow manure can increase the content of organic matter in soil, promote the formation of aggregate structure, improve soil ventilation, be conducive to the formation of huge root system, and make rice grow healthily.

2. The application of basal fertilizer can promote the early emergence of grain seedlings. The base fertilizer is mainly organic fertilizer, combined with a proper proportion of nitrogen, phosphorus and potassium quick-acting chemical fertilizer, there is a nutrient supply at the beginning of new roots, which is beneficial to the early growth and rapid development of grain seedlings.

3. The application of base fertilizer can make the fertilizer effect of organic fertilizer last for a long time, and can maintain the steady growth of grain seedlings in the middle and later stage without de-fertilization and early senescence.

III. Application of Rice Base Fertilizer

Rice base fertilizer generally refers to the fertilizer applied in combination with soil preparation before transplanting seedlings. The paddy fields in the north are generally idle in winter. In autumn or spring, organic fertilizers and some chemical fertilizers can be scattered on the surface of the fields. The fertilizers are turned and buckled into the deep soil by deep ploughing, and then the rest of the chemical fertilizers are sprinkled before irrigation. Then rake, rotary ploughing and plate leveling (commonly known as "water leveling"). Fertilizer can also be sprinkled on the field after raking, and the combination of soil and fertilizer can be achieved through water leveling.

The base fertilizer is mainly organic fertilizer, supplemented by chemical fertilizer. Organic fertilizer is a kind of complete fertilizer, which contains all kinds of nutrients, including sodium, magnesium, sulfur, calcium and various trace elements in addition to nitrogen, phosphorus and potassium. The application of organic fertilizer can improve the aeration performance of soil, improve the performance of fertilizer and water conservation, and promote the steady growth of rice plants. thus it is beneficial to obtain high yield and high quality of rice. Farm manure must choose mature farm manure. With the application of sufficient base fertilizer, the decomposition of organic fertilizer is slow, the utilization rate is low, the fertilizer effect period is long, and the nutrients are complete, so it is better to be used as base fertilizer.

In the application of rice base fertilizer, attention should be paid to the timing and proportion of rice base fertilizer.