Humic acid-type calcium-magnesium-sulfur soil conditioner and its preparation method

Abstract

The invention provides a humic acid-type calcium-magnesium-sulfur soil conditioner. The soil conditioner takes 17-30wt% of humic acid, 50-67wt% of desulfurized gypsum, 2-4wt% of ammonium sulfate, 2-3wt% of urea, and 7-13wt% of a magnesium fertilizer as the raw materials for processing and production. According to the requirements of the soil conditioner, a organic matter content is greater than or equal to 15.0%, total nitrogen is greater than or equal to 2.0%, calcium oxide is greater than or equal to 13.0%, magnesium oxide is greater than or equal to 2.0%, sulfur is greater than or equal to 8.0%, a water content is less than or equal to 15.0%, and the pH of the soil conditioner is 4-6.5. The soil conditioner of the invention contains abundant organic matters, active groups, available nitrogen, exchangeable calcium, magnesium and easily absorbable sulfur element. While improving saline-alkali soil, the soil conditioner can provide nitrogen and calcium, magnesium, sulfur as well as other secondary elements to crops in a balanced way. The soil conditioner provided in the invention can significantly improve the physiochemical properties of saline-alkali soil, promote crop growth, as well as improve and enhance crop quality and yield.

Description

technical field [0001] The invention relates to the field of agricultural technology, in particular to a humic acid type calcium magnesium sulfur soil conditioner and a preparation method thereof. Background technique [0002] With the extensive use of a large number of inorganic chemical fertilizers, the organic matter content of farmland soil is getting lower and lower, the number of microorganisms is also decreasing year by year, and the physical and chemical properties of the soil are getting worse. The invention provides a humic acid type calcium magnesium sulfur soil conditioner . It can improve various bad states of the soil. [0003] Humic acid is a large class of black or brown multi-condensed ring-shaped natural organic colloidal compounds, which contain a large number of active groups such as benzene nucleus, carboxyl group, hydroxyl group, phenol group, etc., which have strong complexation, chelation and surface adsorption capabilities. Humic acid has a good ...

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Problems solved by technology

Chinese patent application No. 200610122407.7 announced "acidic soil conditioner containing coal-fired flue gas desulfurization solid waste". The soil conditioner mainly uses the complexation or chelation of humic acid to locally adjust the active iron, aluminum, If the manganese concentration is used for soil improvement, the improvement effect is limited

No. 200910142804.4 announced that "the product after absorbing sulfur dioxide is processed into a soil conditioner for saline-alkali soil improvement". The soil conditioner is made of rough raw materials, complex components, many steps in the treatment process, and a long cycle, so the improvement effect is limited

So far, the present invention has not been seen in the report

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