MySheen

Soil testing and formula fertilization for planting rice

Published: 2024-11-05 Author: mysheen
Last Updated: 2024/11/05, According to the fertilizer demand characteristics of main crops and the technology of formula fertilization, there are three main principles of soil testing and formula fertilization: first, the combination of organic fertilizer and inorganic fertilizer; second, the combination of large, medium and trace elements; third, the combination of land use and land cultivation.

I. Technical introduction

According to the fertilizer demand characteristics and formula fertilization technology of main crops, there are three main principles of soil testing formula fertilization: the first is the combination of organic fertilizer and inorganic fertilizer; the second is the combination of large, medium and trace elements; the third is the combination of land use and cultivation land. Balance between input and output. The methods for determining the amount of fertilizer mainly include soil and plant test recommended fertilization method, fertilizer effect function method, soil nutrient abundance and deficiency index method and nutrient balance method.

II. Operating rules

In the medium fertility field, the soil testing formula fertilization model for rice yield of 460-510 kg per mu is as follows:

(1) the total amount and ratio of fertilization

The nitrogen: phosphorus: potassium is about 0.5: 0.8, the total urea is about 13: 15 kg, the phosphorus pentoxide is 6: 8 kg, the potassium oxide is 9: 13 kg.

(2) fertilization scheme

1. Base fertilizer

(1) applying 1000-1600 kg fresh green manure or 800-1400 kg farm manure per mu of organic manure.

(2) 35 kilograms of special fertilizer for rice, 40 kilograms of superphosphate, 5 kilograms of potassium sulfate and 2 kilograms of zinc sulfate.

2. Topdressing

(1) 8kg urea and 2kg potassium sulfate are applied to tiller fertilizer per mu.

(2) applying urea 5kg / mu and potassium sulfate 4kg / mu for panicle fertilizer.

(3) spraying 0.7 kg urea plus 0.2 kg potassium dihydrogen phosphate and 50 kg water per mu to prevent premature senility.

III. Conclusion

The use of soil testing formula fertilization technology can greatly reduce the production cost, increase the per unit yield and increase the total yield.

 
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