Method for continuous safe production of rice in slightly cadmium-polluted acid soil

A technology for acidic soil and safe production, applied in the field of agricultural environment, to achieve the effect of easy acceptance, quick effect and easy implementation

Inactive Publication Date: 2019-12-03
唐熙雯
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to overcome the deficiencies and defects mentioned in the above background technology, and focus on how to use a low-cost, sustainable, resource-saving, simple-to-operate and energy-saving method on mild cadmium-contaminated acid soil The method of effectively reducing the accumulation of rice cadmium in mildly cadmium-polluted acidic soil can realize the sustainable and safe production of rice and achieve the purpose of managing while producing. The sustainable development of cultivated land across the country plays an important role in promoting food security, increasing farmers' income, rural development and agricultural revitalization

Method used

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  • Method for continuous safe production of rice in slightly cadmium-polluted acid soil
  • Method for continuous safe production of rice in slightly cadmium-polluted acid soil

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Embodiment 1

[0028] A method of the present invention for continuously and safely producing rice in slightly cadmium-polluted acidic soil. The object processed in this embodiment is the slightly cadmium-polluted acidic soil in Shifeng Village, Hekou Town, Xiangtan County. The cadmium content of late rice brown rice is 0.40 mg / kg , The soil properties are shown in Table 1 below.

[0029] Table 1: Chemical properties of the tested soil in Example 1

[0030]

[0031] In this embodiment, the method for continuously and safely producing rice in slightly cadmium-polluted acid soil includes the following steps:

[0032] Spread the quicklime evenly on the mildly cadmium-polluted acidic soil 20 days before transplanting the early rice at an application rate of 60kg / mu. After the quicklime is sprinkled, plow and mix the mildly cadmium-polluted acidic soil, and wait until the soil moisture balances. After 15 days, apply commercial organic fertilizer together with nitrogen, phosphorus, and potassium fertili...

Embodiment 2

[0039] This example is a field technology demonstration. More than 100 mu of field technology demonstration was conducted in Yanbu Village, Huashi Town, Xiangtan County, Xiangtan County. The total cadmium content of paddy soil in the demonstration area is 0.25mg / kg~0.44mg / kg, and late rice cadmium The content is 0.248-0.370, and the pH is 4.68-6.5.

[0040] The method for reducing cadmium accumulation in rice in mildly cadmium-polluted acid soil of this embodiment includes the following steps:

[0041] Spread the quicklime evenly on the mildly cadmium-contaminated acidic soil 20 days before transplanting the early rice at an application rate of 100kg / mu. After the quicklime is sprinkled, plow and mix the mildly cadmium-contaminated acidic soil, and wait until the soil moisture balances. After 15 days, apply commercial organic fertilizer together with nitrogen, phosphorus, and potassium fertilizer. The commercial organic fertilizer application rate is 100kg / mu, and then transplant l...

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Abstract

The invention provides a method for continuous safe production of rice in slightly cadmium-polluted acid soil. According to the method, low-cadmium-accumulation rice is selected for transplanting planting in double cropping rice regions; in low-cadmium-accumulation rice whole growth period, flooding irrigation is adopted, lime is evenly scattered in the slightly cadmium-polluted acid soil before early rice transplanting and after late rice transplanting, the slightly cadmium-polluted acid soil is turned over and evenly stirred after early rice season lime scattering; when soil moisture balanceis achieved, commercial organic fertilizer is applied together with nitrogen, phosphorus and potassium fertilizer. The method is simple in operation, and is reliable; working procedures and labor intensity of farmers are not increased; operation is convenient; applications by farmers are convenient; effect is achieved quickly after using; the effect in large area applications is ideal; and obvious effect on prevention and controlling of acid soil heavy metal pollution and continuous guaranteeing of rice quality and safety production is achieved.

Description

Technical field [0001] The present invention relates to the field of agricultural environment, in particular to a technical method for continuous and safe production of rice on mildly cadmium polluted acid soil. Background technique [0002] In recent years, the process of industrialization and urbanization in my country has been accelerating, a large number of pollutants are discharged at will, coupled with the lack of effective prevention and control measures, making soil pollution of heavy metals increasingly intensified, the pollution area is expanding year by year, and local problems are prominent, causing great difficulties in environmental governance. Soil heavy metal pollution exists in a wide range, long time, and the pollution is relatively hidden, cannot be biodegraded, and may continuously accumulate in organisms through the food chain, which has posed a serious threat to the quality and safety of agricultural products in polluted areas. In particular, the successive ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/10B09C1/08A01G22/22A01B79/02
CPCA01B79/02A01G22/22B09C1/08B09C1/105B09C2101/00Y02A40/22
Inventor 唐熙雯
Owner 唐熙雯
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