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High-yield selenium-enriched rice planting method capable of efficiently reducing cadmium content in rice

A planting method and rice technology, applied in the field of agricultural science, can solve the problems affecting the yield and quality of rice, and achieve the effects of improving the economic benefit of planting, improving the quality of rice, and increasing the yield

Inactive Publication Date: 2018-12-28
YIELEAD RICE IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The invention provides a high-yield selenium-enriched rice planting method that can efficiently reduce the cadmium content in rice. Aiming at the current large area of ​​soil cadmium pollution, the cadmium pollution of the rice planted and produced is relatively serious, which seriously affects the yield and quality of rice. Through systematic The planting method blocks the accumulation of cadmium in rice, reduces the cadmium content in rice, and increases yield

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The cadmium-contaminated field soil for rice planting is PH5.5, red-yellow soil, soil samples are collected, Cd content is detected, and rice is planted according to the following method:

[0031] (1) Selection of rice varieties with low cadmium accumulation, the method is as follows:

[0032] (A) Wuyou Yinzhan, Shunyou 656, Anyou 390, Quanyou 113, Longliangyou 1019, Nongxiang 24, Wugufeng 1, Xing'an Xiangzhan, Shenyou 566, Yongxian 15, Jiyou 585 , Jiangzao 361, a total of 12 commonly used hybrid rice or conventional rice as the selection range;

[0033] (B) Treat the rice seeds with 1.5% hydrogen peroxide for 24 hours, wash them with distilled water, and place them in a germination box at 29°C to accelerate germination. After the dew is white, they are sown and raised in artificial substrates equipped with perlite and 1 / 2 Hoagland nutrient solution. The weight ratio of rock to nutrient solution is 1:8.

[0034] (C) When the rice seedlings have three leaves and one he...

Embodiment 2

[0050] The rice variety "Wugufeng No. 1" was selected as the rice production variety, and the production method was as follows:

[0051] The cadmium-contaminated field soil for rice planting is PH6.1, brownish-yellow soil, soil samples are collected, Cd content is detected, and rice is planted according to the following method:

[0052] (1) low cadmium accumulation variety screening method is the same as embodiment 1

[0053] (2) Spread the soil improver in Example 1 to the soil surface at a rate of 35kg / mu, use the soil improver to increase the pH of the paddy soil to 6.5, plant Lishihe, and the density is 100 plants / m 2 , after 4 months, remove Lishihe by root;

[0054] (3) Apply sodium selenite 1% aqueous solution 50mL / mu after soil plowing, water 15kg and spray, continue to plant milk vetch, sow when the daily average temperature drops below 25°C, the sowing rate is 2.5kg per mu, Carry out green pressing 20 days before seedling transplanting, apply lime 20kg per mu when ...

Embodiment 3

[0064] The rice variety "Jiyou 585" is selected for production, and the production method is as follows:

[0065] The cadmium-contaminated field soil for rice planting has a pH of 5.7, brownish-yellow soil, soil samples are collected, and the Cd content is detected, and rice is planted according to the following method:

[0066] (1) low cadmium accumulation variety screening method is the same as embodiment 1

[0067] (2) Spread the soil improver in Example 1 to the soil surface at a rate of 40kg / mu, use the soil improver to increase the pH of the paddy soil to 7.5, plant Lishihe, and the density is 160 plants / m 2 , after 4 months, remove Lishihe by root;

[0068] (3) Apply sodium selenite 1% aqueous solution 150mL / mu after soil plowing, spray with 25kg of water, continue to plant milk vetch, sow when the daily average temperature drops below 25°C, the sowing rate is 5kg per mu, transplant rice seedlings In the first 20 days, green pressing was carried out, and 35kg of lime ...

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Abstract

The invention discloses a high-yield selenium-enriched rice planting method capable of efficiently reducing cadmium content in rice. The method comprises the steps of low-cadmium accumulation speciesselection, soil remediation and multiple agronomic measures. By means of the method, the cadmium content of planted rice on a piece of cadmium-polluting rice land can be significantly reduced, the method has the advantages of being simple, efficient and free from secondary pollution; rice yield is improved, rice quality is improved while the yield is improved, planting economic benefits are improved, and the method is suitable to low cadmium rice production in a cadmium-polluting rice planting region and has broad application prospects.

Description

technical field [0001] The invention relates to the field of agricultural science and technology, in particular to a high-yield selenium-enriched rice planting method for efficiently reducing cadmium content in rice. Background technique [0002] Heavy metals refer to metals with a specific gravity greater than 4 or 5. There are about 45 types, such as copper, cadmium, zinc, iron, cobalt, cadmium, manganese, cadmium, cadmium, tungsten, aluminum, gold, silver, etc. Heavy metals such as cadmium, manganese, copper, and zinc are trace elements needed for life activities, but all heavy metals are toxic to the human body if they exceed a certain concentration. [0003] The area of ​​cultivated land polluted by heavy metals such as Cd, As, Cr, Pb in my country is nearly 20 million hectares, accounting for about 1 / 5 of the total cultivated land area, and the total economic loss is at least 20 billion yuan. The Cd content of paddy soil in some areas in China has seriously exceeded t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01G22/22
CPCA01G22/22
Inventor 乔保建乔琪夏祥华任代胜付锡江陶元平彭冲
Owner YIELEAD RICE IND
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