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Planting method for reducing content of heavy metal cadmium in rice

A planting method and heavy metal technology, applied in fertilization methods, rice cultivation, agriculture, etc., can solve the problems of heavy metal treatment that are difficult to apply to large-scale rice fields, and achieve the effects of weak absorption capacity, short growth period, and increased yield

Pending Publication Date: 2022-07-29
CROP INST SICHUAN PROVINCE ACAD OF AGRI SCI +3
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a planting method for reducing the content of heavy metal cadmium in rice, which has the advantages of reducing the content of heavy metal cadmium in rice, and solves the problem that it is difficult to apply heavy metals in large-scale paddy fields.

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  • Planting method for reducing content of heavy metal cadmium in rice

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Effect test

Embodiment 1

[0028] A planting method for reducing the content of heavy metal cadmium in rice, comprising the following steps:

[0029] S1. Pre-fertilization: apply basal fertilizer in the soil where rice is grown. The basal fertilizer includes quicklime, organic fertilizer, calcium magnesium phosphate fertilizer and potash fertilizer. The application amount of quicklime in the basic fertilizer is 80KG / mu, and the application amount of organic fertilizer in the basic fertilizer is 150KG / mu. The application amount of calcium magnesium phosphate fertilizer in the base fertilizer is 20KG / mu, and the application amount of potassium fertilizer in the base fertilizer is 10KG / mu;

[0030] S2. Transplanting and planting: irrigate the soil for rice planting with water layer, the thickness of the water layer is kept at 3cm, and then perform shallow water transplanting;

[0031] S3. First season silage management: In the early stage of rice planting, seedlings are raised and transplanted in the field...

Embodiment 2

[0039] S1. Pre-fertilization: Apply basal fertilizer in the soil where rice is grown. The basal fertilizer includes quicklime, organic fertilizer, calcium magnesium phosphate fertilizer and potash fertilizer. The application amount of quicklime in the basic fertilizer is 100KG / mu, and the application amount of organic fertilizer in the basic fertilizer is 200KG / mu. The application amount of calcium magnesium phosphate fertilizer in the base fertilizer is 30KG / mu, and the application amount of potassium fertilizer in the base fertilizer is 15KG / mu;

[0040] S2. Transplanting and planting: irrigate the soil for rice planting with water layer, the thickness of the water layer is kept at 4cm, and then perform shallow water transplanting;

[0041] S3. Silage management of the first season: in the early stage of rice planting, seedlings are raised and transplanted in the field or managed by direct seeding for the same field production, and the rice is fertilized later, and the amount...

Embodiment 3

[0049]S1. Pre-fertilization: Apply basal fertilizer in the soil where rice is grown. The basal fertilizer includes quicklime, organic fertilizer, calcium magnesium phosphate fertilizer and potash fertilizer. The application amount of quicklime in the basic fertilizer is 120KG / mu, and the application amount of organic fertilizer in the basic fertilizer is 250KG / mu. The application amount of calcium magnesium phosphate fertilizer in the base fertilizer is 40KG / mu, and the application amount of potassium fertilizer in the base fertilizer is 20KG / mu;

[0050] S2. Transplanting and planting: irrigate the soil for rice planting with water layer, the thickness of the water layer is kept at 5cm, and then perform shallow water transplanting;

[0051] S3. Silage management of the first season: in the early stage of rice planting, seedlings are raised and transplanted in the field or managed by direct seeding for the same field production, and the rice is fertilized later, and the fertili...

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Abstract

The invention discloses a planting method for reducing the content of heavy metal cadmium in rice, and relates to the technical field of rice planting. Comprising the following steps: S1, pre-fertilization: applying a base fertilizer to soil for planting rice, wherein the base fertilizer comprises quicklime, an organic fertilizer, a calcium magnesium phosphate fertilizer and a potash fertilizer; s2, transplanting rice seedlings, to be more specific, irrigating water layers of the soil for planting the rice, and then transplanting the rice seedlings in shallow water. The method comprises the steps that the upper end of first-season silage is harvested, stubbles are reserved for 20-30 cm, then rice is fertilized, 5 KG of pure nitrogen is fertilized per mu, 3 KG of pure nitrogen is fertilized per mu, the rice normally sprouts in the regeneration season, tillering fertilizer and panicle fertilizer are topdressed to the rice in the regeneration season, pest and disease damage is prevented and controlled in the whole growth period of the rice, and when 95% of the rice in the regeneration season is yellow and ripe, the rice can be harvested. By utilizing the characteristics of weak root absorption capacity, short growth period, low accumulation amount of heavy metal cadmium in rice and better taste quality of rice than one-season rice in the regeneration season, the yield of ratooning rice is increased, and the development of high-quality rice industry is facilitated.

Description

technical field [0001] The invention relates to the technical field of rice planting, in particular to a planting method for reducing the content of heavy metal cadmium in rice. Background technique [0002] Rice is a crop with strong cadmium accumulation capacity. The problem of cadmium pollution in paddy fields makes the safe production of rice become the most concerned issue of the people. To this end, domestic and foreign researchers have carried out research in various fields such as soil, biology, and cultivation, and have proposed many heavy metal rice field treatment technologies. A relatively mature rice cadmium pollution control model has been gradually formed in China, that is, the rice cadmium pollution control technology system of "low cadmium varieties + flooded irrigation throughout the growth period + application of quicklime to adjust soil pH + auxiliary measures". [0003] However, in the prior art, it is difficult to apply to heavy metal treatment in larg...

Claims

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Application Information

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IPC IPC(8): A01G22/22A01C21/00C05G3/00C05G1/00
CPCA01G22/22A01C21/005C05B13/02C05G3/00C05D1/00C05D3/02
Inventor 李旭毅欧阳裕元朱从桦杨春桃王来泉刘忠义王越廖宇鹏唐家川李冠良吕程吕宗良吴兵
Owner CROP INST SICHUAN PROVINCE ACAD OF AGRI SCI
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