Planting technology for reducing content of chromium and arsenic in rice

A planting technology, rice technology, applied in the field of farmland restoration, can solve problems such as chromium and arsenic pollution restoration, achieve the effect of solving local food security problems, reducing chromium content, and improving the quality and yield of agricultural products

Pending Publication Date: 2022-02-15
CHINA CITY ENVIRONMENT PROTECTION ENGINEERING LIMITED COMPANY
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  • Application Information

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Problems solved by technology

[0003] Chinese patent document CN 105750323 A discloses a repair method for farmland chromium pollution under the conditions of planting and production. The repair method is mainly applied in the field in the form of a passivating agent, which plays a biologically effective passivation effect on the Cr element, but It only changes the form of Cr, and if the environment changes later, it may lead to the enhancement of Cr bioavailability, but this patent only repairs a single chromium pollution, and cannot repair chromium and arsenic pollution in soil at the same time

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  • Planting technology for reducing content of chromium and arsenic in rice

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Add organic fertilizer to the polluted soil at 500kg / mu, and then plough the farmland. During the organic fertilizer spreading operation, it is necessary to ensure that the organic fertilizer is spread evenly. After the spreading, the farmland is rotated and the fields are soaked with water. Then, "Zhongzao 35" was transplanted, paying attention to the growth of rice, controlling rice diseases and insect pests in different periods, and spraying silicon-rich foliar inhibitor at the heading and grain filling stages, with 200ml / mu each time. Flooded measures were taken before the rice was fully grown, and the soil surface was required to have a water layer of no less than 3 cm. After the rice was mature, the chromium and arsenic in the rice were detected respectively.

Embodiment 2

[0047] Add organic fertilizer to the polluted soil at 500kg / mu, and then plough the farmland. During the organic fertilizer spreading operation, it is necessary to ensure that the organic fertilizer is spread evenly. After the spreading, the farmland is rotated and the fields are soaked with water. Then transplanting "Ezao 18", paying attention to the growth of the rice, controlling rice diseases and insect pests in different periods, and spraying silicon-rich foliar inhibitor at the heading stage and grain filling stage, 200ml / mu each time. Flooded measures were taken before the rice was fully grown, and the soil surface was required to have a water layer of no less than 3 cm. After the rice was mature, the chromium and arsenic in the rice were detected respectively.

Embodiment 3

[0049] Add organic fertilizer to the polluted soil at 500kg / mu, and then plough the farmland. During the organic fertilizer spreading operation, it is necessary to ensure that the organic fertilizer is spread evenly. After the spreading, the farmland is rotated and the fields are soaked with water. Then transplanting "Lingliangyou 32", paying attention to the growth of rice, controlling rice diseases and insect pests in different periods, and spraying silicon-rich foliar inhibitor at the heading stage and grain filling stage, 200ml / mu each time. Flooded measures were taken before the rice was fully grown, and the soil surface was required to have a water layer of no less than 3 cm. After the rice was mature, the chromium and arsenic in the rice were detected respectively.

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Abstract

The invention relates to the technical field of farmland restoration, in particular to a planting technology for reducing the content of chromium and arsenic in rice. The planting technology comprises the steps of raising and transplanting seedlings to a rice planting area; applying an organic fertilizer before transplanting; performing water management in the rice growth process; spraying a leaf surface resistance and control agent once in a heading stage and a filling stage respectively, wherein the leaf surface resistance and control agent comprises urea, monopotassium phosphate, trace elements and silicon powder; after the rice is mature, detecting the rice, and especially detecting the content of chromium and arsenic in the rice. According to the planting technology provided by the invention, through strict water management, application of the montmorillonite-containing organic fertilizer and repeated spraying of the leaf surface resistance and control agent, the content of chromium and arsenic in the rice can be effectively reduced, the problem of planting in a polluted farmland is solved, and the problem that edible crops cannot be planted in the polluted farmland is solved.

Description

technical field [0001] The invention relates to the technical field of farmland restoration, in particular to a planting technology for reducing the content of chromium and arsenic in rice. Background technique [0002] With the vigorous development of industries such as electroplating and petrochemical equipment production, due to the backward awareness of initial production management, production sewage has not been discharged up to standard, and pollutants have entered irrigation channels and rivers, aggravating heavy metals (chromium, cadmium, arsenic, mercury, lead, etc. ) pollution, so it is necessary and urgent to carry out soil remediation and risk management of agricultural land in the region. According to relevant research, the average chromium (Cr) content in Chinese soil has reached 78.94mg / kg, which is significantly higher than the background value of 57.30mg / kg. Chromium-contaminated soil will not only reduce the productivity of farmland soil, but also lead to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01G22/22A01C21/00A01G7/06C05G3/00C05G3/80C05G5/20C05F17/20
CPCA01G22/22A01C21/005A01G7/06C05D9/00C05B7/00C05F17/20C05G3/00C05G5/20C05G3/80C05F5/00C05F5/002C05F5/008C05F11/00C05C9/00C05D9/02Y02W30/40
Inventor 马烁王文燕景琪徐诗琦闫梦洋赵颖
Owner CHINA CITY ENVIRONMENT PROTECTION ENGINEERING LIMITED COMPANY
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