Fast effect and slow release combined fertilizer formula special for cotton

Abstract

The present invention relates to a quickly-acting and slowly-released special-purpose formula fertilizer for cotton. Said special-purpose formula fertilizer is made up by mixing quickly-acting complex fertilizer formed from elements of N,P2O5,K2O,B and Zn with coated slowly-released complex fertilizer, in which the total content of nitrogen, phosphorus and potassium is 40%-45%; the weight mixing ratio of N1P2O5,K2O, B and Zn is 1:0.4-0.6:1.0-1.2:0.01-0.02: 0.01-0.02.

Description

technical field [0001] The invention belongs to the technical field of agricultural fertilizers, in particular to a special formula fertilizer for cotton formed by mixing quick-acting compound fertilizers and coated slow-release compound fertilizers in proportion. Background technique [0002] Cotton is a major user of petrochemicals (fertilizers, pesticides, etc.), which are non-renewable resources in field crops. The amount of chemical fertilizers used in cotton occupies the first place among major crops in my country and remains high. The cost of fertilizers accounts for about 50% of the cost of cotton planting materials. . Cotton needs macro-element and micro-element fertilizers throughout its life. It is a total nutritional crop and is a crop with a high level of fertilization among field crops. Scientific fertilization is beneficial to increase cotton yield, improve quality, reduce production cost and reduce pollution. Cotton is different from grain crops such as corn...

AI Technical Summary

Problems solved by technology

At present, the seasonal utilization rate of chemical fertilizers in my country is low, 30% to 35% for nitrogen, 10% to 20% for phosphorus, and 30% to 50% for potassium, which are more than ten percentage points lower than the world average level.

The blind and excessive application of nitrogen fertilizer in our country has caused the waste of tens of millions of tons of chemical fertilizer resources every year, and the economic loss of tens of billions of yuan

[0004] Second, the impact on the environment

Due to the low utilization rate of chemical fertilizers, the use of excessive chemical fertilizers also leads to the destruction of soil aggregate structure and the deterioration of soil physical properties

[0005] Third, there are many types of conventional cotton fertilization, such as base fertilizer, dowry fertilizer, seedling fertilizer, bud fertilizer (balanced fertilizer), head fertilizer, flower and boll fertilizer, capping fertilizer, etc. It is a complicated operation process with many times and flowers Too much work, low fertilizer efficiency, especially the difficulty of topdressing in the later stage, which affects the improvement of the comprehensive benefit of cotton

At present, some slow-release fertilizers developed in China, such as coated urea, calcium magnesium phosphate fertilizer wrapped ammonium bicarbonate, long-acting ammonium bicarbonate, etc., are mainly used for crops with high economic value, but are rarely used on cotton. The main reasons are: first, the price issue. Compared with ordinary fertilizers, the production cost of coated controlled-release fertilizers is 1-2 times higher than that of conventional fertilizers; There are few studies on controlled release; the third is that in the research on slow-release fertilizers, the slow-release is only emphasized one-sidedly, and the accelerated release is ignored. Defertilization in the later period, and excessive growth in the middle period; Fourth, the cotton growth period is longer, and the vegetative growth and reproductive growth overlap for a long time, and cotton has the characteristics of unlimited growth, all of which make the problem of cotton fertilization more complicated