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Rice cultivation method for effectively reducing cadmium content of unhulled rice

A rice cultivation and paddy technology, applied in the directions of rice cultivation, plant cultivation, botanical equipment and methods, etc., can solve the problems of low bioavailability, high toxicity, small range between poisoning amount and required amount, etc., and achieve simple operation. The effect of easy operation, increasing yield and reducing cadmium and Cd content

Inactive Publication Date: 2014-05-07
湘潭顺天农业科技开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Inorganic selenium generally refers to sodium selenite and sodium selenate, which are obtained from by-products of selenium-containing ore powder in metal deposits; however, the absorption and utilization of inorganic selenium enhancers are not ideal, and their bioavailability is low and their toxicity is high. The range between the poisoning amount and the required amount is small, so its usage is strictly limited. Today, Japan, the United States and other developed countries have banned the addition of inorganic selenium such as sodium selenite in food and even animal feed.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Embodiment 1, the present invention includes the conventional cultivation method of rice cultivation, but in the tillering stage, mixed fertilizers including quicklime and plant ash are applied, and other nitrogen fertilizers can also be increased. Because the occurrence of tillering is related to the nutritional status of seedlings, especially nitrogen nutrition plays a leading role, and actively promotes the early tillering and properly controls the later tillering; the tillering stage is also the main period of root growth. It is called the first root, and the branch roots grown on the first root are called the second root or the first branch, and the third and fourth roots can grow later; all nodes of rice have hair Root ability, along with the birth of leaves, grows roots one by one; the development of rice roots is closely related to the conditions of water, fertilizer, air, heat, etc. in the soil, and it is also the period when rice seedlings grow most vigorously....

Embodiment 2

[0018]Example 2, the weight ratio of quicklime to plant ash in the mixed fertilizer used in the tillering stage of the present invention is 8: (0.8-2), and the ratio of 8.5:1.5 or 9:1 can also be used; the mixed fertilizer can also be used here Add organic fertilizer in the fertilizer, promptly comprise quicklime, plant ash and organic fertilizer in the mixed fertilizer, and its preferred weight ratio is: quicklime 10 parts, plant ash 1-2 part, organic fertilizer 2-3 part. The mixed fertilizer can be applied at a rate of 50kg / mu to achieve the purpose of adjusting the pH of the soil to meet the above requirements. All the other are with embodiment 1.

Embodiment 3

[0019] Embodiment 3, the present invention comprises humic acid, organic selenium in the foliage fertilizer sprayed at the initial earing stage, wherein organic selenium accounts for about 0.8%-1.2% of the total weight, and also can add penetrant therein, and penetrant mainly is In order to enhance the absorption effect of foliar fertilizer, humic acid is mainly used to increase the yield. The organic selenium concentration is 0.1mg / kg-0.3mg / kg, the effect is better, the human body does not have long-term storage selenium selenium organ, the body needs Selenium should be continuously obtained from the diet in sufficient amounts. The balance of selenium concentration has an important protective and promoting effect on the physiological functions of many organs and tissues. The reduction of cadmium Cd and the supplementation of selenium kill two birds with one stone. All the other are the same as above-mentioned embodiment.

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Abstract

The invention relates to a rice cultivation method for effectively reducing the cadmium content of unhulled rice, and belongs to a rice cultivation method. The technical problems that rice cultivated through an existing rice cultivation method is high in cadmium content and low in yield are solved. According to the technical scheme, the rice cultivation method includes a conventional rice cultivation method and is characterized in that in the tillering stage, mixed fertilizer comprising quick lime and plant ash is broadcast to adjust the pH value of soil to be larger than 6 and smaller than 7.2 so that cadmium absorption of seedlings can be reduced; in the first-earing stage, leaf fertilizer containing selenium (Se) is sprayed, so that selenium absorption of the seedlings particularly young ears is increased, selenium-rich rice is produced, and cadmium absorption of the unhulled rice is restrained. The rice cultivation method is mainly used for rice cultivation.

Description

technical field [0001] The invention relates to a rice cultivation method, in particular to a rice cultivation method for effectively reducing the cadmium content of rice. Background technique [0002] As we all know, the earth and everything on it are composed of chemical elements. As the spirit of all creatures in the chemical and biological evolution on the earth, the chemical composition of the human body is roughly the same as that of the earth in both quality and quantity, and contains almost all the elements existing on the surface of the earth. These elements are divided into macro elements and trace elements according to their content. Constant elements include 11 kinds of oxygen, carbon, hydrogen, nitrogen, calcium, sulfur, phosphorus, sodium, potassium, chlorine, magnesium, etc., which constitute the basic structure of the human body, accounting for 99.95% of the weight of the human body, of which hydrogen and oxygen combined water ( h 2 O) accounts for 65% of ...

Claims

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Application Information

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IPC IPC(8): A01G16/00C05G3/00A01G22/22
Inventor 邓述东邓钰静
Owner 湘潭顺天农业科技开发有限公司
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