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 paddy fields in winter fallow, in particular to a controlled-release compound fertilizer special for potato fallow paddy fields in which nitrogen, phosphorus and potassium fertilizers are mixed and coated with a coating capable of controlling the release rate of nutrients . Background technique [0002] Potato has strong adaptability and high yield, and is one of the four major food crops in the world. After rice harvesting in southern my country, a large number of fallow fields are left idle, which is especially suitable for the development of potato production. Therefore, the potato planting area has expanded rapidly in recent years. Potatoes have very strict requirements for nutrients. During the growth process, there is a correlation between the aboveground stem and leaf part and the underground tuber part. The growth of the aboveground s...

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.