Controlled-releasing compounding fertilizer used specially for potato planted in winter rice field

Abstract

A release-controlled compound fertilizer for planting potato in the rice field in the southern winter contains N, P2O5 and K2O in ratio of (2-3): (1-1.5): (4-5). Its preparing process includes such steps as pulverizing N, P and K fertilizers, granulating, drying, screening and coating film for controlling its release. Its advantage is proportional release of N, P and K by stages.

Description

Technical field [0001] The invention relates to a special controlled-release compound fertilizer for potato winter slack rice field, in particular to a special controlled-release compound fertilizer for potato winter slack rice field which is mixed with nitrogen, phosphorus and potassium fertilizers and is coated with a coating that can control the release rate of nutrients . Background technique [0002] The potato is highly adaptable and has a high yield. It is one of the four major food crops in the world. After harvesting rice in the rice cultivation areas in southern my country, a large number of winter fallow fields are left unused, which is particularly suitable for developing potato production. Therefore, the potato sown area has expanded rapidly in recent years. Potatoes have very strict nutrient requirements. There is a correlation between the above-ground stems and leaves and the underground tuber parts during the growth process. The growth of...

AI Technical Summary

Problems solved by technology

In addition, the current large-scale application of plastic film mulching cultivation in potato production has played a positive role in improving ground temperature, early market, reducing weed damage, and increasing yield. Generally, the fertilizer is applied at one time before covering the film, and no topdressing will be done later, which will easily cause the problem of excessive nutrients in the early stage and insufficient nutrients in the later stage of crop growth.