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Improved calcium humate and preparation method and application thereof

A technology of calcium humate and humic acid, applied in the field of agriculture, can solve the problems of increasing the dispersion of soil clay particles, accelerating the decomposition of organic matter, and reducing the content of organic matter, so as to increase soil microbial biomass, increase the ratio, and carbon content high effect

Active Publication Date: 2016-06-22
INST OF SOIL SCI CHINESE ACAD OF SCI
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Problems solved by technology

However, the simple application of lime tends to increase the dispersion of soil clay particles and cause soil compaction, and the addition of lime to the soil will accelerate the decomposition of organic matter, especially the mineralization of fulvic acid and humic acid with simpler structures, making the organic matter content decreased

Method used

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  • Improved calcium humate and preparation method and application thereof
  • Improved calcium humate and preparation method and application thereof
  • Improved calcium humate and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] 1 Materials and methods

[0019] 1.1 Test material

[0020] Humic acid is mainly extracted from black soil (Helen City, Heilongjiang Province), herbaceous peat (Suihua City, Heilongjiang Province), woody peat (Indonesia), and weathered coal (Datong City, Shanxi Province). The test soil is a typical barren acidic soil in the subtropical red soil area. The basic properties of the soil are shown in Table 1. The soil samples were air-dried, ground and passed through a 2mm sieve, and impurities such as fine roots visible to the naked eye were removed for later use.

[0021] Table 1 Basic physical and chemical properties of the tested soil

[0022]

[0023] 1.2 Test method

[0024] 1.2.1 Extraction of humic acid

[0025] Humic acid is mainly extracted from the following four samples: black soil, herbaceous peat, woody peat, and weathered coal. The extraction method of humic acid mainly refers to the standard provided by the International Humic Acid Association, which ...

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Abstract

Provided are improved calcium humate and a preparation method and application thereof. The prepared calcium humate product is high in carbon content, and the exchangeable calcium content is higher than that of general commercial calcium humate; when the calcium humate product is applied to acid poor soil, the acid soil aluminum toxicity barrier can be obviously eliminated, the soil pH and base ions are increased, the soil alkaline and acid phosphatase activity ratio is increased, soil microbial biomass is increased, and the oil fertility property and biological function are improved.

Description

technical field [0001] The invention belongs to the field of agriculture, in particular to calcium humate based on the principle of complexation precipitation reaction, its preparation method and its application in improving acidic soil. Background technique [0002] The rainy and hot conditions in the southern red soil area are relatively rich, which is not conducive to the retention of organic matter. At the same time, the acidic red soil has few base ions, low pH, and high exchangeable acid. Therefore, how to improve the pH of the soil in this area, reduce aluminum toxicity obstacles, and increase soil organic matter. Content is an urgent problem to be solved. Humus improves soil fertility by affecting soil physical, chemical and biological properties; humic acid, as a physiologically active substance, can also promote plant growth. Previously, it was reported that lime or gypsum was used to improve acidic soil. On the one hand, the application of lime can increase soil ...

Claims

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Application Information

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IPC IPC(8): C09K17/14C09K109/00
CPCC09K17/14C09K2109/00
Inventor 刘明唐晓雪刘佳
Owner INST OF SOIL SCI CHINESE ACAD OF SCI
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