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Planting pattern of synchronous safety production and remediation of soil with excessive cadmium in rare earth ore region in southern Jiangxi Province

A rare earth mining area and safe production technology, applied in the restoration of polluted soil, plant cultivation, botanical equipment and methods, etc., can solve the problems of increasing the safety risk of navel orange fruit, increasing the absorption of Cd by navel orange, etc., to achieve safe production and fix sync effect

Active Publication Date: 2017-06-13
INST OF SOIL SCI CHINESE ACAD OF SCI
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AI Technical Summary

Problems solved by technology

For soils with Cd content > 1.5mg / kg and severe acidification, if interplanting with Sedum sedum is improperly planted, it will increase the absorption of heavy metals such as Cd by navel oranges, and increase the safety risk of navel oranges

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] 1. Soil preparation: according to the conventional navel orange cultivation requirements, it is especially required to prepare irrigation and drainage channels to prevent spring floods and autumn droughts.

[0017] 2. Navel orange transplanting and management: purchase high-quality seedlings, excavate planting holes, fertilize, transplant and plant in accordance with conventional methods. Spring planting is generally carried out in late February, and can also be transplanted in November with artificial planting and soil Carry out autumn planting, the density is generally 4m*4m; After planting for 1 year, begin to excavate a wide and deep 50-60cm circular hole expansion ditch (fertilization ditch) year by year along the outer edge of the planting hole every November. Internal fertilization, generally within 4-5 years to fully complete the work of expanding holes and improving soil. Fertilization, pruning and other management of navel oranges are carried out in a conventi...

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Abstract

The invention provides a planting pattern of synchronous safety production and remediation of soil with excessive cadmium in a rare earth ore region in southern Jiangxi Province. According to the pattern, substitute plantation of interplanting sedum plumbizincicola with navel oranges is implemented in the cadmium-polluted farmland which is not suitable for planting rice and vegetables in the rare earth ore region in southern Jiangxi Province, and the sedum plumbizincicola is interplanted outside navel orange transplanting holes or / and annular hole enlarging furrows. With the adoption of the planting pattern, synchronization of safety production and remediation can be realized.

Description

technical field [0001] The invention relates to the technical field of safe production and restoration of cadmium-exceeding farmland, in particular to a replacement planting technology for cadmium-contaminated farmland in a rare earth mining area in southern Jiangxi. Background technique [0002] According to the National Soil Pollution Survey Bulletin on April 17, 2014, the excessive rate of heavy metal points in cultivated land in my country is 19.4%, and the excessive rate of Cd points is as high as 7.0%. Among the 1,672 soil points in the 70 mining areas investigated, 33.4% exceeded the standard, and the soil around the non-ferrous metal mining areas was seriously polluted by cadmium, arsenic, and lead. The national "Soil Pollution Prevention and Control Action Plan" clearly states that, based on soil pollution and agricultural products exceeding standards, counties (cities, districts) with concentrated cultivated land for safe use should formulate and implement plans fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01B79/02A01G17/00A01G1/00B09C1/10
CPCA01B79/02A01G17/005A01G22/00B09C1/105B09C2101/00
Inventor 王兴祥丁昌峰吴龙华
Owner INST OF SOIL SCI CHINESE ACAD OF SCI
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