Mixed type sustained and controlled release chemical fertilizer

Abstract

A sustained and controlled release fertilizer of mixed type belongs to the technical field of fertilizer, which is characterized in that the fertilizer is manufactured by mixing the following materials by weight percentage: 5 percent to 20 percent of common fertilizer and 80 percent to 95 percent of sustained release fertilizer and or controlled release fertilizer. The common fertilizer is the compound fertilizer or the mixed fertilizer of nitrogen, phosphor and potassium or the common fertilizer is any one or any blending of nitrogenous fertilizer, phosphate fertilizer and potassium fertilizer. The controlled release fertilizer is urease inhibitor or easterifiable inhibitor or nitrifying inhibitor or the sustained release fertilizer is resin fertilizer or coated fertilizer. Compared with the sustained release fertilizer of the prior art, the invention has lower cost and can be applied to farmland extensively. Fertilizer proportion can be adjusted according to situations so that the fertilizer release conforms to the requirement of crops.

Description

technical field

[0001] The invention belongs to the technical field of chemical fertilizers, in particular to a mixed slow-controlled release chemical fertilizer. Background technique

[0002] With the continuous development of my country's agriculture and rural economy, the majority of farmers have put forward new requirements for chemical fertilizers. Scientific fertilization, convenient fertilization, and improving the utilization rate of fertilizers have become issues of great concern to farmers today. Due to the serious waste in the use of chemical fertilizers, new slow and controlled release compound fertilizers have become the development direction of the world's chemical fertilizer industry.

[0003] At present, all countries in the world are vigorously developing controlled-release fertilizers. Regarding the standards of controlled-release fertilizers, Trenkel synthesized the research on slow-release and controlled-release nutrient release rates and release time in ...