Composite fertilizer for wheat plantation

Abstract

The invention relates to the field of agricultural fertilizer, and in particular to a composite fertilizer for wheat plantation. Aiming at the fertilizer demand characteristics of wheat, the status quo of the wheat plantation fertilizer in our country, and harm of single fertilizer administration, the invention provides a composite fertilizer for wheat plantation. The composite fertilizer enhances soil fertility, improves soil structure, reduces pesticide residues, and overcomes the harm on soil and crop of single fertilization. The technical scheme is as below: a composite fertilizer for wheat plantation is prepared from the following components 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. The preparation method is by mixing the above ingredients, crushing, mixing, granulating, drying, screening and packing. Compared with the simple substance fertilizer, the provided by the invention has complete fertilizer nutrients, small amount of sub-component and good physical and chemical properties, and is conducive to the 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 output 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 output 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] Wheat needs to absorb more than 20 kinds of nutrients in the process of growth and development, 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 an...

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 chemical fertilizer raw materials to the processing and production, some heavy metal elements or toxic substances are always brought into chemical fertilizers, among 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 make the content of As in the soil reach 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 phosphate 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 can increase rapidly, and after being ingested into the human body, it will be reduced to NO2- by microorganisms, which will reduce the oxygen-carrying capacity of the blood, induce methemoglobinemia, and in severe cases can cause people to suffocate and die; at the same time, NO3- N can also be converted into strong carcinogen nitrosamines in the body, which can induce various digestive system cancers and endanger human health. Under the conditions of protected cultivation, the accumulation of NO3-N in the 100cm soil layer with organic fertilizer mainly applied At 240~740kg / hm2

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

Images