Compound fertilizer for wheat planting

Abstract

The invention relates to the field of crop fertilizer and particularly relates to compound fertilizer for wheat planting. According to the demand characteristics of wheat for fertilizer, the current situation of existing wheat planting fertilization of China and the harm of single fertilizer application, the invention aims to provide the compound fertilizer for wheat planting, wherein the compound fertilizer not only enhances the soil fertility, but also can improve the soil structure, reduce pesticide residues, and perfectly overcome the harm of single fertilization on soil and crops at the same time; a technical scheme is as follows: the compound fertilizer for wheat planting is prepared from the following components in parts by weight: 30-40 parts of lignite, 30-40 parts of urea, 20-25 parts of monoammonium phosphate, 10-15 parts of potassium chloride and 3-5 parts of bacillus subtilis; a preparation method of the compound fertilizer comprises the following steps: mixing the components, grinding, stirring, pelletizing, drying, screening and packaging. Compared with single-substance fertilizer, the fertilizer provided by the invention has the advantages of complete nutrients, few accessory components, good physical and chemical properties, and facilitates realization of scientific fertilization.

Description

technical field [0001] The invention relates to the field of crop fertilizers, in particular to a compound fertilizer used for wheat planting. Background technique [0002] Wheat is an important food crop and economic crop. Statistics show that its yield and planting area are second only to rice, ranking second in the world. It plays an important role in people's livelihood and economy. It effectively uses limited land resources to increase the yield of wheat crops Quality and quality are of great significance to my country's food security and food safety, and have always been the goal pursued by scientists. [0003] During the growth and development of wheat, more than 20 kinds of nutrients need to be absorbed, mainly three kinds of macronutrients: nitrogen, phosphorus and potassium; macronutrients such as sulfur, calcium and magnesium; Elements, these elements mainly come from fertilizers, which are absorbed from the soil during the growth of wheat. [0004] Long-term and...

AI Technical Summary

Problems solved by technology

[0006] The heavy metals that cause pollution mainly include Zn, Cu, Co and Cr. From the mining of raw materials to the processing and production of chemical fertilizers, some heavy metal elements or toxic substances are always brought into chemical fertilizers, of which phosphorus fertilizer is the main one. At present, among the chemical fertilizers used by wheat in my country, Phosphate fertilizer accounts for about 20%. The raw material for phosphate fertilizer production is phosphate rock, which contains a large amount of harmful elements F and As. At the same time, the processing of phosphate rock will also bring in other heavy metals Cd, Hg, As, F, especially Cd; , Phosphate fertilizer produced by using waste acid will also contain chloral, which will cause toxicity to crops. Studies have shown that whether it is acidic soil, slightly acidic soil or calcareous soil, long-term application of chemical fertilizers will cause the accumulation of heavy metal elements in the soil. Directly endanger human health. For example, long-term application of ammonium nitrate and ammonium phosphate can increase the content of As in the soil to 50-60mg / kg. The amount of Cd also increased

[0007] 2. Microbial activity is reduced, and substances are difficult to transform and degrade:

[0010] At present, the chemical fertilizers used in my country are mainly nitrogen fertilizers, while phosphorus fertilizers, potassium fertilizers, and compound fertilizers are less. Long-term application causes soil nutritional imbalance, aggravates the depletion of soil P and K, and leads to the accumulation of NO3-N. NO3-N itself is non-toxic, but If it is not fully assimilated by crops, its content will increase rapidly, and after ingestion, it will be reduced to NO2- by microorganisms, which will reduce the oxygen-carrying capacity of the blood, induce methemoglobinemia, and cause people to suffocate and die in severe cases; at the same time, NO3- N can also be converted into strong carcinogen nitrosamines in the body, induce various digestive system cancers, and endanger human health. Under protected cultivation conditions, the accumulation of NO3-N in the 100cm soil layer with organic fertilizers as the main At 240 ~ 740kg / hm2

[0011] 4. The acidification is intensified, and the pH changes greatly:

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