Drought-resistant functional fertilizer for saline-alkali soil and preparation method thereof

Abstract

The invention relates to the technical field of agricultural fertilizers and medium-mild saline-alkali soil planting. The invention relates to a drought-resistant functional fertilizer for saline-alkali soil. The drought-resistant functional fertilizer is prepared from the following raw materials in parts by weight: 0.1-5 part of oligomeric acid, 0.1-1 part of polyglutamic acid, 0.01-0.5 part of salicylic acid, 0.01-0.5 part of chitosan oligosaccharide, 1-20 parts of activated humic acid, 1-20 parts of bentonite and 50-90 parts of nitrogen-phosphorus-potassium fertilizer. The fertilizer is good in application effect, relatively small in dosage and low in transportation cost; high-activity effective components contained in the fertilizer can change the structure of soil in a local area of the soil, reduce harm of harmful ions in the soil to plants, effectively promote germination and rooting of seeds, enable crops to have a very good drought resisting effect, improve stress resistance of the crops and enable the crops to grow healthily so as to achieve the purpose of yield increase. The air permeability and the water permeability of the soil are improved to a certain extent, the alkalinity of the soil is reduced, the soil is loosened, the water-retaining property of the soil is improved, the soil is not deteriorated and hardened, and the formation of a soil aggregate structure is promoted.

Description

technical field [0001] The invention relates to the technical field of agricultural fertilizers and medium-slight saline-alkali planting, in particular to a drought-resistant functional fertilizer for saline-alkali land and a preparation method thereof. Background technique [0002] Saline-alkali land is a type of salt accumulation, which means that the salt contained in the soil affects the normal growth of crops. According to the incomplete statistics of UNESCO and FAO, the area of ​​saline-alkali land in the world is 954.38 million hectares, of which my country is the largest 99.13 million hectares. The west of Jilin Province is the area with the most serious soda salinization in Northeast China, and it is also one of the three major saline-alkali lands in the world. According to data, the area of ​​saline-alkali land in western Jilin Province is 969,000 hectares, including 60,700 hectares of mild saline-alkali land and 464,100 hectares of moderate saline-alkali land. Fo...

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Problems solved by technology

The present representative saline-alkali land has the following fertilizer formula technologies with chemical fertilizer fertilizer components: 1) patent CN104355911A discloses a compound fertilizer for saline-alkali land and a preparation method thereof, main components: urea, phosphate fertilizer, potash fertilizer , polyglutamic acid, humic acid, zinc sulfate, manganese sulfate, borax and zeolite powder, though have certain saline-alkali resistance effect, lack good drought-resistant function; 2) patent CN108558533A discloses a kind of special-purpose fertilizer and Its preparation method, main components: chicken manure, diatomaceous earth, bentonite, sulfur, microbial agent, humic acid, phosphorus fertilizer slurry, ammonia, surfactant, although it is a compound fertilizer with chemical fertilizer nutrients, but Low nutrient, more like a kind of improver for saline-alkali land; 3) patent CN101456765 discloses special compound fertilizer for saline-alkali land improvement, main components: desulfurization slag, bentonite, monoammonium phosphate, urea, potassium chloride or potassium sulfate, zinc sulfate, humic Among them, desulfurization slag, humic acid and bentonite have a certain saline-alkali improvement buffering effect, but the effect is general, and the amount of desulfurization slag is relatively large, and the source is not extensive; 4) Patent application number 2016106240224 discloses a biological organic-inorganic Compound fertilizer and its preparation method, main components: attapulgite, potassium humate, zeolite powder, polyglutamic acid, wood vinegar, urea, monoammonium phosphate, potassium sulfate, ammonium sulfate granulated and added bacteria, mixed with citric acid , superphosphate, polyacrylamide and livestock and poultry fermented organic fertilizer are mixed, the processing technology is relatively complicated, the equipment is more, the plant occupies a large area, and the processing cost is high; Method, main ingredients: humic acid, microorganisms, farmyard manure, straw, superphosphate, ferrous sulfate, fly ash, furfural slag, desulfurized gypsum, nitrogen, phosphorus and potassium fertilizer, the content of nitrogen, phosphorus and potassium is relatively low, and it is closer to organic fertilizer in saline-alkali land Improver, if the planting crops need higher nutrients, it is necessary to add a lot of fertilizer

[0006] In addition to biological fertilizers, organic fertilizers and some special saline-alkali soil improvers, the existing saline-alkali land fertilizers have relatively fewer chemical fertilizers developed specifically for saline-alkali land, and most of the special fertilizers developed for saline-alkali land have lower nutrients and more additives. Complicated, although there are some effects, but the production cost and transportation cost are relatively high, which increases the planting cost

Moreover, saline-alkali land is relatively dry, and most fertilizers used in saline-alkali land do not have the function of making crops drought-resistant

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