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Acid soil conditioner containing chitosan oligosaccharide and application

A soil conditioner and acidic soil technology, applied in soil conditioning materials, applications, organic fertilizers, etc., can solve problems such as high soluble salt content, poisonous plants and microorganisms, and pollute the environment, and achieve high yields

Inactive Publication Date: 2015-12-23
HAINAN ZHENGYE ZHONGNONG HIGH TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the above improvers can neutralize the acidity of the soil to a certain extent, and the raw materials are relatively sufficient, there are also some shortcomings. The simple application of quicklime can only kill various pathogenic bacteria and parasite eggs, etc., and cannot remove heavy metals and toxic substances. The poisoning of organic substances; if the application of dolomite needs to consume valuable mineral resources, it will also increase the cost of agricultural production; industrial wastes such as phosphate rock powder contain a certain amount of toxic metal elements, such as containing a small amount of lead (Pb), cadmium ( Cd), mercury (Hg), arsenic (As), chromium (Cr); fly ash also contains a small amount of lead (Pb), cadmium (Cd), arsenic (As), chromium (Cr)
Although the content is very small, there is still a risk of polluting the environment for long-term application; the use of industrial waste such as fly ash, alkali slag or urban sludge contains pathogenic bacteria, parasite eggs, and heavy metals such as Ni, Cd, Pb and polysaccharides. Refractory toxic organic substances such as chlorinated biphenyls and dioxins have a high content of soluble salts, which are toxic to plants and microorganisms

Method used

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  • Acid soil conditioner containing chitosan oligosaccharide and application
  • Acid soil conditioner containing chitosan oligosaccharide and application
  • Acid soil conditioner containing chitosan oligosaccharide and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The effect of embodiment 1 soil conditioner on soil pH, peanut yield

[0022] The soil pH of the test site was 5.02. The test set up no fertilization treatment, soil conditioner treatment containing chitosan oligosaccharide, corresponding control treatment without chitosan oligosaccharide, conventional fertilizer treatment and no fertilization treatment (blank control), each treatment was repeated 3 times, and random arrangement was adopted. The size of each plot is 10m × 1.5m, and the soil conditioner is spread or sprayed and then plowed 10-20cm deep for uniformity. The peanut planting method is film-covered direct seeding, and the plant spacing × row spacing = 0.3m × 0.4m. When harvesting, harvest peanuts in an area of ​​2.0m×1.0m per plot, air-dry the harvested peanuts naturally, and weigh the peanut pods. At the same time, randomly select three points in the middle of each plot, drill soil samples 10-15cm below the soil surface, and mix the soil into one soil samp...

Embodiment 2

[0041] The effect of embodiment 2 soil conditioner on soil pH, paddy yield

[0042] The soil pH of the test site was 4.93. The experiment set up the soil conditioner treatment containing chitosan oligosaccharide, the corresponding control treatment without chitosan oligosaccharide, conventional fertilizer treatment, and no fertilization treatment (blank control), each treatment was repeated 3 times, and random arrangement was adopted. The size of each plot is 20m (length) × 1.5m (width). After harvesting the previous paddy rice, spread or spray the soil conditioner and evenly plow the land, then use machine rotary tillage to sow late rice conventionally and manage conventionally. When harvesting, at the same time, three points were randomly selected in each plot, and soil samples 2-10 cm below the soil surface were drilled in each plot, and the soil was mixed into 1 soil sample. Air-dry, measure soil pH value (pH meter), the result is shown in Table 2.

[0043] The soil cond...

Embodiment 3

[0061] The mensuration of embodiment 3 soil conditioner application times

[0062] Adopt the method of embodiment 1. However, the peanuts should be topdressed once 30 days after emergence, and the spacing between topdressings should be 0.3m×0.4m. After the peanuts are harvested, rake the soil evenly, and at the same time randomly take three points in the middle of each plot, drill soil samples 10-15cm below the soil surface, and mix the soil into 1 soil sample. Air-dry, measure soil pH value (pH meter), the result is shown in Table 3.

[0063] Soil conditioners are as follows:

[0064] The soil conditioner formula and preparation method of the present embodiment are as follows:

[0065] Soil conditioner 1: 0.5 parts of chitosan oligosaccharide, 99.5 parts of vermiculite. Chitooligosaccharides and vermiculite are processed into fine particles with a particle size not greater than 0.5 cm, placed in a pre-mixer and mixed for 30 minutes to obtain the soil conditioner 1 describ...

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Abstract

The invention belongs to the field of soil improvements, and relates to application of soil conditioner containing chitosan oligosaccharide to acid soil conditioning. The conditioner is prepared from 0.05-100 parts of chitosan oligosaccharide, 0-80 parts of soil improvement components, 0-15 parts of artificially synthesized high-molecular compounds and 0-100 parts of mineral substances. The soil improvement components are one or more of lime, plant ash, dolomite, coal ash, slaked lime, calcium carbonate, powdered rock phosphate, ammonium carbonate, lime nitrogen and the like in alkaline substances. The artificially synthesized high-molecular compounds are obtained by mixing one or more of polyacrylic acid type high-molecular compounds, vinyl acetate maleic acid type high-molecular compounds and polyvinyl alcohol high-molecular compounds. The mineral substances are obtained by mixing one or more of peat, brown coal, decomposed coal, vermiculite, bentonite, zeolite, perlite and sepiolite. When applied, the soil conditioner is uniformly sprayed or atomized on the surface of acid soil, and the acid soil is uniformized through deep tillage arrangement or rotary tillage; or, the soil conditioner is used for topdressing; in the application method, the application amount of the soil conditioner ranges from 50 kg / hm<2> to 1000 kg / hm<2>, the soil conditioner is applied 1-3 times, the pH value of soil can be promoted to rise, the soil acidity can be lowered, or soil can be neutral.

Description

technical field [0001] The invention belongs to the field of soil improvement, and relates to the application of a chitosan-containing oligosaccharide and its composition in acidic soil conditioning. Background technique [0002] Due to the influence of planting patterns, fertilization, climate and other factors, there are currently about 200 million hectares of acidic soil in China. Most acidic soils have a pH of less than 5.5, and some are even lower. Due to years of continuous cropping and excessive application of chemical fertilizers in some orchards and protected vegetable protection areas, the phenomenon of soil acidification is becoming more and more serious, which has become a major limiting factor for the safe production and sustainable development of fruits. Soil acidification leads to deterioration of soil structure, reduction of cation exchange capacity and base saturation, serious loss of soil nutrients, and poor soil ridges, which affect the normal growth of p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/40C09K101/00C09K109/00
Inventor 侯华民张善学麦发任尤燕平
Owner HAINAN ZHENGYE ZHONGNONG HIGH TECH
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