Film coated control release composite fertilizer special for regetables and its making method

Abstract

This invention relates to a preparation method of coated controlled release fertilizer for the vegetable, which includes the liquid membrane material synthesis and fertilizer's parcel process. It select natural, environmental protecting and high polymer of polyvinyl alcohol and starch as the main material, by adding modifiers, surfactants, foam remove agent, water-retaining agent, inhibitors and carrier trace elements to made coated liquid material; in particular, simple conditions, add the inorganic mine powder wrapped fertilizer drops, made a environment-friendly, multi-purpose, capsule controlled and slow-release fertilizer that not only can control nutrients releasing, but also can improve soil physical and chemical nature. The efficiency up to 80 ~ 100 days, one crop fertilizer can meet the nutrient demand of entire reproductive life, and effectively improve the utilization of fertilizers, reducing pollution, saving energy.

Description

technical field [0001] The invention relates to a method for preparing special compound fertilizer for coated and controlled-release vegetables, belonging to the technical field of fertilizer preparation. technical background [0002] Chinese cabbage is one of the traditional vegetable varieties in my country. It is low in price, rich in nutrition, high in yield and easy to preserve. It is widely planted throughout the country and is called "Chinese cabbage". Especially in Northeast China, because of its low price, easy storage, and delicious sauerkraut that can be pickled, it has become one of the main vegetables for people to live through the winter. [0003] But at present, due to the excessive use of common chemical fertilizers in the cultivation of vegetables in our country, the nitrate content in plants is seriously exceeded, which seriously endangers human health. Especially vegetables need more nitrogen fertilizers, which are prone to leaching, denitrification, and ...

AI Technical Summary

Problems solved by technology

[0003] However, at present, due to the excessive use of common chemical fertilizers in the cultivation of vegetables in our country, the nitrate content in the plants is seriously exceeded, which seriously endangers human health.

Especially vegetables need more nitrogen fertilizers, which are prone to leaching, denitrification, and volatilization loss in the soil, resulting in serious loss of nutrients in fertilizers, extremely low fertilizer utilization rates, and directly causing environmental pollution

In order to improve the utilization rate of fertilizers at home and abroad, the development of coated fertilizers has been carried out one after another. However, the production process is generally complicated. Although it has achieved a certain effect of prolonging the fertilizer effect, it cannot effectively control the release of fertilizer nutrients, and the main method is to prolong the nitrogen nutrient Release-based, can not take into account the release of phosphorus and potassium nutrients

[0004] The market price of Chinese cabbage is relatively low, and the profit of planting is small. If conventional chemical fertilizer base fertilizer is used and topdressing is used, a lot of manpower and material resources will be wasted, and the loss of fertilizer will be serious. The profit margin of farmers' planting will be even worse.