Special fertilizer for rice in saline and alkaline land

Abstract

The invention relates to special fertilizer for rice in saline and alkaline land and a preparation method thereof. The special fertilizer is prepared from the following raw materials according to weight percent: 25 to 45% of organic fertilizer, 35 to 55% of inorganic fertilizer, acid regulating agents, water retaining agents and biological agents, wherein the organic fertilizer is composed and fermented by straw and peat; the inorganic fertilizer is prepared from the following raw materials according to mass ratio: 40 to 200 of monoammonium phosphate containing 49% of P2O5and 9% of N; 150 to 400 of calcium magnesium phosphate containing 18% of P2O5; 300 to 320 of urea containing 46% of N; 80 to 85 of potassium chloride containing 60% of K2O; 40 to 90 of heptahydrate containing 33% of available zinc; 65 to 135 of boric acid containing 15% of available boron; and 0 to 100 of filler; the proportion of nitrogen to phosphorus to potassium which are contained in slow-release micro-element fertilizer is 15:12:5.

Description

technical field [0001] The invention relates to the field of fertilizers, in particular to a special fertilizer for rice in saline-alkali land. Background technique [0002] Rice is an important food crop and is moderately sensitive to salt stress. Salt is one of the important environmental factors affecting the growth and development of rice. Soil salinization along with the industrialization process and the scarcity of freshwater resources has become an urgent need for rice cultivation today. One of the important difficulties to break through; salt damage is the main abiotic stress that limits rice production. Under saline conditions, its yield decreases, and salt-sensitive varieties are more affected by salt stress than salt-tolerant varieties; Large-volume crops need about 8 million tons of fertilizer annually, accounting for 17-20% of China's fertilizer consumption. However, long-term single application of chemical fertilizers will cause long-term problems such as soil ...

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Problems solved by technology

[0002] Rice is an important food crop and is moderately sensitive to salt stress. Salt is one of the important environmental factors affecting the growth and development of rice. Soil salinization along with the industrialization process and the scarcity of freshwater resources has become an urgent need for rice cultivation today. One of the important difficulties to break through; salt damage is the main abiotic stress that limits rice production. Under saline conditions, its yield decreases, and salt-sensitive varieties are more affected by salt stress than salt-tolerant varieties; Large-volume crops need about 8 million tons of fertilizer annually, accounting for 17-20% of China's fertilizer consumption. However, long-term single application of chemical fertilizers will cause long-term problems such as soil compaction, nutrient imbalance, and poor physical properties, and the production capacity will be significant. decrease, and the fertilizer efficiency of organic fertilizers is slow. At the same time, most of the crop straws, leaves, and weeds in the prior art are directly burned in the field to avoid affecting the cultivated land; although this treatment method is simple, it is harmful to the beneficial microorganisms in the soil. The damage is serious, which is not conducive to the growth of crops; in addition, the carbon in the straw accounts for the vast majority, followed by potassium, silicon, calcium, magnesium, sulfur, and phosphorus. The products after incineration mainly include CO2, CO, SO2, NO2 and N2O. Harmful gases enter the atmosphere and cause serious environmental pollution; if these straws are composted and returned to the field, they will become rich organic fertilizers to fertilize the soil and improve soil properties; the degradation of straw cellulose by microorganisms is through the free Cellulase, degrades cellulose by hydrolase mechanism and oxidase mechanism; the use of microorganisms can finally decompose cellulose into CO2 and H20, and the growth of microorganisms can produce a large amount of bacterial protein, so the use of microorganisms to treat straw , can greatly increase its nutritional value

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