Method for planting rice in weakly acidic soil with slight mercury pollution

A mercury-polluted, weakly acidic technology, applied in the soil research of agricultural planting, and in the field of agricultural planting, can solve the problems of reducing the effectiveness of mercury, and achieve the effect of reducing the effectiveness of mercury, simple raw materials, and low cost

Pending Publication Date: 2021-09-17
JIANGSU ACADEMY OF AGRICULTURAL SCIENCES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is how to treat mildly mercury-polluted farmland soil at a low cost, thereby reducing the availability of mercury in the soil, and blocking or weakening the mercury in the soil from entering the crops above the ground.

Method used

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  • Method for planting rice in weakly acidic soil with slight mercury pollution
  • Method for planting rice in weakly acidic soil with slight mercury pollution
  • Method for planting rice in weakly acidic soil with slight mercury pollution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The mercury-contaminated farmland in a certain place was selected for the test. The soil pH was 5.83, which was weakly acidic; the total mercury content in the soil was 0.92mg / kg, and the cadmium, arsenic, lead, and chromium in the soil did not exceed the standard, indicating that the test field was slightly polluted by mercury. .

[0026] Carry out fertilization, transplanting and agricultural management in accordance with local conventional methods.

[0027] The method specifically includes the following steps: the rice is sown in the middle and late May for raising seedlings, and then transplanted in good time and densely planted reasonably. In terms of water management, scientifically irrigate according to the principle of "turning green with an inch of water, tillering with thin water, drying the field with enough tillering, budding in shallow water, moistening and strengthening seeds, and drying when yellow ripe". In terms of fertilizer management, tillering fert...

Embodiment 2

[0030] In addition to spraying foliar selenium fertilizer (made from malt selenium and humic acid, Se≥15‰, humic acid≥30g / L) during the rice filling period, dilute the stock solution 500 times before spraying, and apply 200mL stock solution per mu to ensure the dilution Except for the concentration of Se greater than 30 mg / L, the other methods were all carried out in accordance with the conventional method disclosed in Example 1 for fertilization, transplanting and agricultural management.

Embodiment 3

[0032] In addition to 1-2 weeks before rice planting, apply calcium magnesium phosphate fertilizer (200kg / mu) to the farmland at one time in combination with site preparation, and rotate or rake evenly to make the contaminated soil fully mix with calcium magnesium phosphate fertilizer in situ, and soak in water for 4 hours Except for the above, the others all carried out fertilization, rice transplanting and agricultural management according to the conventional method disclosed in Example 1.

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Abstract

The invention belongs to the field of agricultural planting, particularly relates to the field of soil research of agricultural planting, and more particularly relates to a method for planting rice in weakly acidic soil with slight mercury pollution. The method for planting the rice in the weakly acidic soil with slight mercury pollution is characterized in that calcium magnesium phosphate fertilizer is broadcast before rice planting, and foliar selenium fertilizer is sprayed in a rice filling stage. After a technology of the method for planting the rice in the weakly acidic soil with slight mercury pollution is adopted, the effectiveness of mercury in the soil can be obviously reduced, and the content of available mercury in the soil is reduced by 32.21% through detection by adopting the technical scheme; meanwhile, after the rice is harvested, the reduction rate of the mercury content in agricultural products is 31.6% compared with that of a control group. According to the method for planting the rice in the weakly acidic soil with slight mercury pollution, the agricultural production arrangement is not affected, agricultural production time is not occupied, meanwhile, needed raw materials are simple, cost is low, and the method is a treatment mode suitable for large-scale popularization.

Description

technical field [0001] The invention belongs to the field of agricultural planting, in particular relates to the field of soil research for agricultural planting, and more specifically relates to a method for planting rice in slightly mercury-polluted weakly acidic soil. Background technique [0002] On April 17, 2014, the "National Soil Pollution Survey Bulletin" jointly issued by the Ministry of Environmental Protection and the Ministry of Land and Resources showed that the quality of my country's cultivated land soil environment is worrying, and the rate of points exceeding the standard is 19.4%. The proportions of heavily polluted sites were 13.7%, 2.8%, 1.8% and 1.1%, respectively. [0003] Mercury is one of the main pollutants in the soil. It cannot be metabolized and excreted after entering the human body, and it is a huge health hazard. At present, the method of controlling mercury pollution in soil is mainly to use remediation methods, which will reduce the activity...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01G22/22A01C21/00A01B79/02
CPCA01G22/22A01C21/005A01B79/02
Inventor 童非高岩樊广萍史高玲刘丽珠
Owner JIANGSU ACADEMY OF AGRICULTURAL SCIENCES
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