Special fertilizer for rice in saline-alkali soil

Abstract

The invention discloses a special fertilizer for rice in saline-alkali soil. The special fertilizer is prepared by mixing an organic fertilizer, an inorganic fertilizer, an ameliorant, a water-retaining agent and a biological agent. The specialty fertilizer is characterized in that the organic fertilizer is prepared from the following components in percentage by weight: 45% of fermental chicken droppings, 50% of crushed straws and 5% of wood vinegar and accounts for 25-45% of total weight; the inorganic fertilizer accounts for 35-55% of total weight and is prepared by mixing urea, monoammonium phosphate, calcium magnesium phosphate, potassium chloride, heptahydrate, boric acid and a filling; and the ratio of nitrogen to phosphorus to potassium in a slow-released microelement 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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