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Acidic soil conditioner and application thereof

An acid soil and soil conditioning technology, applied in soil conditioning materials, applications, organic fertilizers, etc., can solve problems such as soil acidification, cadmium heavy metal pollution, soil nutrient loss, etc., to improve soil properties, increase pH, and reduce crop cadmium. Effects of pollution risk

Inactive Publication Date: 2018-01-26
HUNAN SOIL & FERTILIZER INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides an acidic soil conditioner to solve the technical problems of soil acidification, soil nutrient loss and cadmium heavy metal pollution

Method used

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  • Acidic soil conditioner and application thereof
  • Acidic soil conditioner and application thereof
  • Acidic soil conditioner and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0049] In 2014, a potted rice verification test was carried out at the test base of the Hunan Soil and Fertilizer Research Institute. The soil used for the test is the plow layer soil of paddy soil in the yellow mud field developed by slate shale, which was taken from Gaoqiao Town, Changsha City. Its pH value is 5.1, alkaline hydrolysis nitrogen is 176.3mg / kg, available phosphorus content is 30.0mg / kg, soil exchangeable calcium is 104.4mg / kg, exchangeable magnesium is 143.4mg / kg, and total soil cadmium is 0.415mg / kg , soil available cadmium 0.321mg / kg. The rice variety is Hyou 518 (one crop rice). Two treatments, conventional fertilization and conventional fertilization+conditioner, were set up with 7 repetitions. The acidic soil conditioner comprises the following components in mass percentage: 33% of rice husk ash, 16% of quicklime, 26% of calcium magnesium phosphate fertilizer, 23.5% of sepiolite and 1.5% of dicyandiamide. The amount of acidic soil conditioner is 0.67g / k...

Embodiment 2

[0055] In 2015, in Dongjiao Township, Xiangxiang City, Hunan Province, a field plot verification test on the effect of acidic soil conditioners was further carried out. The soil for testing is river sand mud developed by river alluvium, pH value is 5.42, alkali-hydrolyzed nitrogen is 193.4mg / kg, available phosphorus content is 30.0mg / kg, cation exchange capacity is 14.1(cmol(+) / kg, total soil Cadmium 0.395mg / kg, soil available cadmium 0.223mg / kg.Paddy rice kind is Nongken 58 (one crop rice).Two processes are set, i.e. conventional fertilization and conventional fertilization+conditioning agent, repeat 3 times.Acidic soil conditioner is in mass percent Calculated, including the following components: rice husk ash 36%, quicklime 14%, calcium magnesium phosphate fertilizer 24%, sepiolite 24%, dicyandiamide 2%. The amount of conditioner is 100kg / 666.7m 2 . The application time is 3 to 5 days before the seedlings are transplanted, that is, after plowing, the conditioner is evenly ...

Embodiment 3

[0060] In 2016, in Chunhua Town, Changsha City, Hunan Province, a verification test on the effect of conditioners was carried out on double-cropping rice.

[0061] (1) The early rice test soil is a yellow mud field developed from slate shale, with a pH value of 5.57, an alkaline nitrogen content of 265.7 mg / kg, an available phosphorus content of 24.0 mg / kg, and a cation exchange capacity of 9.68 (cmol(+) / kg , soil total cadmium 0.315mg / kg, soil available cadmium 0.202mg / kg. Rice variety is Zhongzao 39. Two treatments are set, i.e. conventional fertilization and conventional fertilization+conditioning agent, repeated 3 times. Acidic soil conditioner is expressed in mass percentage Calculated, including the following components: rice husk ash 35%, quicklime 15%, calcium magnesium phosphate fertilizer 25%, sepiolite 23%, dicyandiamide 2%. Conditioning agent dosage is 100kg / 666.7m 2 . The application time is 3 to 5 days before the seedlings are transplanted, that is, after plowin...

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Abstract

The invention discloses an acidic soil conditioner and an application thereof. The acidic soil conditioner comprises, by mass, 33-36% of rice husk ash, 14-16% of quicklime, 24-26% of calcium magnesiumphosphate, 22-24% of sepiolite and 1.5-2% of dicyandiamide. The conditioner includes the rice husk ash, quicklime, calcium magnesium phosphate, sepiolite and dicyandiamide, and the rice husk ash, quicklime and calcium magnesium phosphate fertilizer are alkaline substances and can increase the pH value of the soil. The rice husk ash and calcium magnesium phosphate commonly act to supplement nutrients lost due to soil acidification. The sepiolite and dicyandiamide commonly act to improve the nitrogen fertilizer utilization rate. The rice husk ash and sepiolite commonly act to improve and repairacidic heavy metal contaminated soil. The rice husk ash, calcium magnesium phosphate and sepiolite commonly act to inhibit the enrichment of cadmium and other heavy metals in crops. The acidic soil conditioner can comprehensively improve the properties of the soil, improve the fertility level of the soil, reduce the cadmium contamination risk of the crops and increase the yield of the crops.

Description

technical field [0001] The invention relates to the field of soil conditioners, in particular to an acidic soil conditioner. In addition, the present invention also relates to an application comprising the above-mentioned acidic soil conditioner. Background technique [0002] Environmental acidification is an important aspect of global change. In recent years, due to the extensive application of nitrogen fertilizers and the intensification of acid deposition, the area of ​​cultivated land with soil acidification in the country is increasing day by day. The concentration of heavy metals such as aluminum, manganese, etc. increases, the activity is enhanced, and it has a toxic effect on plants, causing crop yields to decrease and the quality of agricultural products to decline. [0003] Due to the influence of acid deposition and large-scale application of chemical fertilizers in southern my country, the area of ​​soil acidification is large, the degree of acidification is st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/40C05G3/04C05G3/08A01B79/02C09K101/00C09K109/00C05G3/80C05G3/90
Inventor 李明德吴海勇谷雨刘琼峰
Owner HUNAN SOIL & FERTILIZER INST
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