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A method for rice root iron film to promote soil nitrate reduction

A nitrate and soil technology, applied in the fields of land preparation, agriculture, application, etc., can solve the problems of secondary pollution, etc., achieve the effect of enhancing microbial nitrate reduction, strong operability, and reducing nitrate leaching

Active Publication Date: 2022-02-22
FUJIAN AGRI & FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, nitrification inhibitors are all chemical substances, which are likely to cause secondary pollution
The technology of using iron film on plant roots to affect nitrate reduction in soil has not been reported yet. To develop an environmentally friendly and operable technology to achieve enhanced nitrate reduction, for the removal of soil nitrate under in situ conditions technology matters

Method used

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  • A method for rice root iron film to promote soil nitrate reduction
  • A method for rice root iron film to promote soil nitrate reduction
  • A method for rice root iron film to promote soil nitrate reduction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Example 1 Method for nitrate in a ferrite regulatory soil

[0048] This study was collected in the region of the Chinese Academy of Sciences, the Chinese Academy of Sciences, Tao City Test Weight, to apply a nitrogen fertilizer test (37.90 ° north latitude, 114.67 ° East, altitude 50m). 5 different surface soils were collected in the test area. These soils are dried and the aperture is sieved using a 2 mm sieve. The soil washed granule content was 7.3%, and the particle content was 79.8% and the granulation content was 12.3%. Soil organic matter content is 1.9 g kg -1 , PH is 7.1, nitrate NO 3 -N is 31.3mg kg -1 And soluble organic carbon concentration 4.1mg kg -1 . Due to the use of fertilizers, the nitric concentration of the soil reached 43 ~ 47mgkg due to the use of fertilizers. -1 . figure 1 A chart of blank control (CK) and has induced iron film (IP) rice.

[0049] (1) Use a variety of rice seeds called Japanese sunny rice seeds for 10% h 2 O 2 The solution was soaked...

Embodiment 2

[0076] Example 2 A method for promoting nitrate reduction in soil

[0077] Transfer rice seedlings in 70mg L -1 The ferrous sulfate solution was induced 48 h, and the treated rice seedlings were planted in the soil, planting 4D, flooded 4mm soil, flooding time was 9d.

Embodiment 3

[0078] Example 3 A method of promoting nitrate reduction in the soil

[0079] Transfer rice seedlings in 70mg L -1 The ferrous sulfate solution was induced 48 h, and the treated rice seedlings were planted in the soil, planting 5D, flooded with soil 5mm, flooding time was 10d.

[0080] The above results indicate that induced rice induced iron film in the soil, the microorganisms associated with nitrate reduction and iron oxidation in human-regulated environments are enriched, and the final product is mainly N. 2 . These results indicate that ferrite regulation is a targeted environmentally friendly technique for nitrate reduction in rhizospondel region and to prevent groundwater nitrate pollution.

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Abstract

The invention discloses a method for promoting the reduction of soil nitrate by an iron film at the root of rice. The iron film of the rice can strengthen the reduction of nitrate, and is coupled with the process of iron oxidation and reduction, thereby increasing N 2 The invention can enrich soil denitrifying microorganisms and iron redox microorganisms, and can enhance the nitrate reduction of crop microorganisms, and couple the redox of iron, thereby reducing the risk of nitrate leaching, and is a kind of original It is an environment-friendly method under bit conditions, and has strong practical operability.

Description

Technical field [0001] The present invention belongs to the soil improvement technology, and more particularly to a method of promoting soil nitrate reduction in rice roots. Background technique [0002] Nitrogen is one of the most important elements of farmland. The nitrogen in the soil exists in an organot state and informal form, organic nitrogen comprises eV hydrolyzate and industrial hydrolysis, inorganic nitrogen comprises free nitrogen, ammonium nitrogen, nitrate nitrogen and nitrid nitrogen. The soil is mostly negatively charged colloid, which is easily adsorbed in a large amount of ammonium nitrogen, and it is difficult to absorb the nitrogen nitrogen. Therefore, under rainfall and intake, the nitrogen in the soil is mostly soluble nitrate nitrogen. Therefore, under the sufficient conditions of moisture management, the content of soil nitrate nitrogen has become the main factor in controlling nitrogen-losses. At present, the way to avoid soil nitrogen loss is mainly to a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01B79/02
Inventor 刘婷余林鹏庞亚星赵雪晴秦树平周顺桂
Owner FUJIAN AGRI & FORESTRY UNIV
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