Re-mixed rice fertilizer containing regulator and its prepn process and application

Abstract

The re-mixed fertilizer contains regulator in 0.5-25 wt% and inorganic chemical fertilizer in 75-99.5 wt%, and the regulator is the mixture of concentrated sulfuric acid and organic matter in the weight ratio of 1 to 3-8. The preparation process includes sieving or crushing organic matter as carrier and mixing with concentrated sulfuric acid to react for 10-30 hr to obtain the regulator; mixing inorganic chemical fertilizer; mixing the regulator and the inorganic chemical fertilizer through stirring to obtain the re-mixed fertilizer contains regulator. The present invention can regulate the pH value of surface soil layer and paddy field shallow water layer, meet the requirement of rice seedling to various nutritive elements, create one ideal shallow soil environment and raise the utilization of fertilizer and crop yield.

Description

technical field [0001] The invention relates to a compound fertilizer, in particular to a rice compound fertilizer containing a regulator and its preparation method and application. Background technique [0002] Among the existing food crops, rice planting is one of the main varieties in my country, and the area of ​​paddy fields is large, but the phenomenon of excessive soil salinization is common in coastal rice-growing areas. Now take Donggang City as an example: [0003] The registered area of ​​paddy fields in Donggang City is 830,000 mu. Adding the area of ​​shrimp pond reconstruction and part of the reclaimed saline-alkali flat area, the total is 1.1 million mu. The current situation is that the soil in the rice-growing area south of National Highway 201 is relatively saline-alkali. The value is generally above 7 (such as Guangfu Village, Kulongshan Village, and Xinmin Village in Changshan Town, Linhai Village and Xinhai Village in Beijing Town, Yihuan Town, Huangtuk...

AI Technical Summary

Problems solved by technology

However, the cost of gypsum is too high, which can reach more than 400 yuan per ton, and it is not easy to be accepted by people. In terms of region, it is also not conducive to local materials, which objectively creates obstacles for large-scale promotion and application.

There are also people who use flood irrigation to wash salt and alkali. The disadvantage of this method is that it wastes water resources, is not economical, and is not timely, which is not conducive to the agricultural season.

As far as fertilization is concerned, most of the Donggang area currently uses three 15 compound fertilizers (15 each for nitrogen, phosphorus, and potassium) and potassium sulfate compound fertilizers, as well as single-element inorganic fertilizers. Most of these fertilizers have a pH value above 7 , and the pH value of the soil is high (about 7.5), so the fertilizer applied to the field rapidly increases the salt content of the shallow surface layer of the soil, so that the rice root system cannot absorb various nutrients normally, and reduces the utilization rate of the fertilizer.

[0005] Chinese patent (publication number: CN1149614A) is a kind of multifunctional modulation agent, with saw foam as carrier, composition has ammonium sulfate, diammonium phosphate, is additive with fly ash, consumption is respectively 37.5%, 37.5%, 8.75%, 12% and 4.25%, the preparation method is to pour the dried sawdust into the blender and stir with sulfuric acid in the blender for 30 minutes. There is no carbonization reaction process, and the nutrient content in the product ingredients can meet the entire growth and development period of rice. Potassium sulfate, zinc sulfate and trace elements, so there is no good acid adjustment and the overall effect of obtaining instant organic potassium fertilizer