Soil conditioning type controlled release fertilizer special for fruit vegetable in facility, and preparation and application thereof

Abstract

The invention relates to a soil conditioning type controlled release fertilizer special for fruit vegetable in a facility, and preparation and application thereof. Raw materials for the fertilizer comprise a soil conditioning composition, sulfur and high-molecular polymer coated urea, 5% humic acid coated urea, 6% of recyclable thermoplastic resin coated urea, a urea ground coat of 4% of modified epoxy resin coated potassium nitrate, a urea ground coat of 4% of modified epoxy resin coated diammonium phosphate, 5% humic acid coated diammonium phosphate, 5% humic acid coated potassium nitrate and a potassium sulfate composite fertilizer; and the soil conditioning type controlled release fertilizer is prepared by mixing all above-mentioned raw materials. When fruit vegetable is transplanted in a facility, the fertilizer is used as a base fertilizer and applied into planting holes once for all, and no topdressing of the fertilizer is needed. The fertilizer provided in the invention has a conditioning effect on soil; release of nutrients in the fertilizer is suitable for growth and absorption of fruit vegetable in the facility.

Description

technical field [0001] The invention relates to a controlled-release fertilizer, in particular to a special controlled-release fertilizer for soil-conditioning facility fruits and vegetables and its preparation and application, belonging to the technical field of production and application of controlled-release fertilizers. Background technique [0002] Facility cultivation is one of the important methods of vegetable production in my country. It has the advantages of high yield per unit area and little influence of seasons, so it develops very rapidly in northern my country. However, due to the blind pursuit of yield, excessive fertilization and unreasonable types of fertilizers, after a certain number of years of planting, the phenomenon of salinization has generally appeared in protected vegetable fields, and soil-borne diseases have increased year by year, which has greatly affected the yield of vegetables. quality and fertilizer use efficiency. The salinity in the faci...

AI Technical Summary

Problems solved by technology

First, they only provide nutrients and do not condition the soil

Secondly, there is a certain gap between the nutrient release laws of these fertilizers and the absorption of fruits and vegetables in facilities, because the soil moisture conditions and temperature in the facilities are quite different from those in the open field, which in turn affects the nutrient release of controlled-release fertilizers.

Furthermore, their nutrient controlled release period is not suitable for fruit vegetables in the facility, because most of the fruit vegetables are indefinite growth type, and the growth period in the facility is 0.5 to 1 times longer than that outside the facility

Fourth, the amount of effective nutrients and the ratio of different nutrients in the facility are quite different from those in the vegetable field soil outside the facility

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