Biology-fertigation combined restoration method for medium-and-mild cadmium-polluted soil

A technology for cadmium-contaminated soil and irrigation and fertilization, which is applied in the field of combined biological and irrigating and fertilizing restoration of moderately and mildly cadmium-contaminated soils, can solve the problems of unconsidered production, poor operability, and low cost performance, and achieves speeding up the cycle of remediating polluted soil, The effect of improving the ability to carry cadmium and being easy to popularize and use

Inactive Publication Date: 2018-12-07
FARMLAND IRRIGATION RES INST CHINESE ACAD OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] According to the "National Soil Pollution Survey Bulletin" jointly issued by the Ministry of Environmental Protection and the Ministry of Land and Resources in 2014, 19.4% of cultivated land soil points exceeded the standard, of which light and moderate pollution points accounted for 4.6%, and cadmium points exceeded the standard. According to statistics, my country's cadmium-contaminated farmland exceeds 195,000 mu; cadmium is one of the five most toxic elements in the environment, and because cadmium is not easy to migrate in the soil, the restoration and treatment of cadmium-contaminated soil is a safe agricultural major challenges in production
[0003] At present, the existing cadmium-contaminated soil remediation and treatment methods use technical methods such as abandonment, foreign soil, planting seedlings, chemical regulation, and microbial remediation. Operability is poor

Method used

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  • Biology-fertigation combined restoration method for medium-and-mild cadmium-polluted soil
  • Biology-fertigation combined restoration method for medium-and-mild cadmium-polluted soil
  • Biology-fertigation combined restoration method for medium-and-mild cadmium-polluted soil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The biological and fertigation joint restoration method of medium and light cadmium polluted soil comprises the following steps:

[0028] Step (1): Select silage corn varieties, apply ammonium sulfate fertilizer 25kg / mu, and irrigate with 60m of seedling water 3 / mu, the sowing rate is 2.5kg per mu;

[0029] Step (2): topdressing ammonium sulfate fertilizer 35kg / mu in the jointing stage;

[0030] Step (3): After the silage corn is harvested, it is left fallow for 7 days, during the fallow period, rotary tillage is carried out twice, and the depth of rotary tillage is 20cm;

[0031] Step (4): Select a winter wheat variety, apply 35kg / mu of compound fertilizer and 15kg / mu of urea as a base, and irrigate with 65m of seedling water 3 / mu, sow with a seeding rate of 12kg per mu;

[0032] Step (5): Use clear water to irrigate 40m at the heading and filling stage of winter wheat 3 / mu;

[0033] Step (6): After the winter wheat is harvested, the land is left fallow for 3...

Embodiment 2

[0036] The biological and fertigation joint restoration method of medium and light cadmium polluted soil comprises the following steps:

[0037] Step (1): Select silage corn varieties, apply ammonium sulfate fertilizer 30kg / mu, and irrigate with 70m water for emergence 3 / mu, the sowing rate is 2.8kg per mu;

[0038] Step (2): Topdressing ammonium sulfate fertilizer 40kg / mu in the jointing stage;

[0039] Step (3): After the silage corn is harvested, it is left fallow for 10 days, and rotary tillage is carried out during the fallow period, and the rotary tillage is performed twice, and the depth of the rotary tillage is 30cm;

[0040] Step (4): Select a winter wheat variety, apply compound fertilizer 40kg / mu, urea 18kg / mu fertilizer, and irrigate with 70m of seedling water 3 / mu, sow with a seeding rate of 14kg per mu;

[0041] Step (5): Use clear water to irrigate 50m at the heading and filling stage of winter wheat 3 / mu;

[0042] Step (6): After the winter wheat is h...

Embodiment 3

[0045] The biological and fertigation joint restoration method of medium and light cadmium polluted soil comprises the following steps:

[0046] Step (1): Select green storage corn varieties, apply ammonium sulfate fertilizer 27kg / mu, and irrigate with 65m water for emergence 3 / mu, the sowing rate is 2.7kg per mu;

[0047] Step (2): Topdressing ammonium sulfate fertilizer 37kg / mu in the jointing stage;

[0048] Step (3): After the silage corn is harvested, it is left fallow for 8 days, and during the fallow period, rotary tillage is carried out twice, and the depth of rotary tillage is 25cm;

[0049] Step (4): Select a winter wheat variety, apply compound fertilizer 37kg / mu, urea 16kg / mu fertilizer, and irrigate with 67m of seedling water 3 / mu, the sowing rate is 13kg per mu;

[0050] Step (5): Use clear water to irrigate 45m at the heading and filling stage of winter wheat 3 / mu;

[0051] Step (6): After the winter wheat is harvested, the land is left fallow for 3 da...

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Abstract

The invention discloses a biology-fertigation combined restoration method for medium-and-mild cadmium-polluted soil. The method comprises the following steps: step (1) selecting a silage corn variety,carrying out basal application by using an acidic fertilizer, carrying out irrigation by using emergence water, and carrying out sowing according to a sowing amount of 2.5-2.8 kg per mu; step (2), carrying out top dressing by using the acidic fertilizer in a stem elongation stage; step (3), carrying out fallowing for 7-10 days after silage corns are harvested, and carrying out rotary tillage during the fallowing period; step (4) selecting a winter wheat variety, carrying out basal application by using an alkalescent fertilizer, carrying out irrigation by using the emergence water, and carrying out sowing according to a sowing amount of 12-14 kg per mu; step (5) carrying out irrigation by using clear water in a heading and filling period of winter wheat; and step (6) carrying out fallowingfor 3-5 days after the winter wheat is harvested, and carrying out rotary tillage during the fallowing period. According to the method provided by the invention, basal application is carried out by using the acid fertilizer before sowing the silage corns, and topdressing is carried out by using the acidic fertilizer in the stem elongation stage, so that the cadmium-carrying capacity of corn stalks can be improved, and the soil restoration period can be accelerated.

Description

technical field [0001] The invention relates to the technical field of cadmium-contaminated soil agriculture, and more specifically relates to a combined restoration method of biology and irrigation and fertilization for medium-slight cadmium-contaminated soil. Background technique [0002] According to the "National Soil Pollution Survey Bulletin" jointly issued by the Ministry of Environmental Protection and the Ministry of Land and Resources in 2014, 19.4% of cultivated land soil points exceeded the standard, of which light and moderate pollution points accounted for 4.6%, and cadmium points exceeded the standard The rate reached 7.0%; according to statistics, my country's cadmium-contaminated farmland exceeds 195,000 mu; cadmium is one of the five most toxic elements in the environment. A major challenge for production. [0003] At present, the existing cadmium-contaminated soil remediation and treatment methods use technical methods such as abandonment, foreign soil, pla...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01B79/02B09C1/10
CPCA01B79/02B09C1/105B09C2101/00
Inventor 李平齐学斌张彦杜臻杰郭魏胡艳玲
Owner FARMLAND IRRIGATION RES INST CHINESE ACAD OF AGRI SCI
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