Rice field phosphate fertilizer application method capable of reducing cadmium content in rice grains

A technology of rice grains and application methods, applied in the directions of fertilization methods, applications, fertilization devices, etc., can solve the problems of shortened lifespan, renal dysfunction, and increased mortality.

Inactive Publication Date: 2013-12-25
CHANGZHOU UNIV
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Problems solved by technology

According to Japanese research, long-term consumption of rice with high Cd content will cause human kidney dysfunction, resulting in increased mortality and shortened life span

Method used

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  • Rice field phosphate fertilizer application method capable of reducing cadmium content in rice grains
  • Rice field phosphate fertilizer application method capable of reducing cadmium content in rice grains

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Embodiment Construction

[0013] 1, the amount of phosphorus application in the present invention is based on the active ingredient P of phosphorus 2 o 5 Since the phosphorus content of different fertilizer varieties is different, the specific fertilizer amount should be calculated according to the phosphorus content of the specific fertilizer variety when fertilizing.

[0014] 2. Before fertilizing, fill the paddy field with a thin water layer (about 3cm), apply fertilizer evenly into the water layer, let the water layer dry naturally before watering, and do not drain before the water layer dries up. When fertilizing, try not to make the fertilizer stick to the rice leaves, so as not to burn the leaves.

[0015] 3. In the selection of rice varieties, it is advisable to choose japonica rice varieties with weak Cd absorption ability in soil, and it is not suitable to choose indica rice or hybrid rice varieties with strong Cd absorption ability.

[0016] 4. Apply phosphorus fertilizer according to diff...

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Abstract

The invention relates to a rice field phosphate fertilizer application method capable of reducing the cadmium content of rice grains. The phosphate application level is high; the total phosphate application amount is 135kg / hm<2> based on effective constituents P2O5; phosphate fertilizers are applied for three times; the application amount of each of base fertilizers, tillering fertilizers and granular fertilizers is 1 / 3 of the total phosphate application amount. According to the method, the cadmium content in the rice grains can be effectively reduced and the rice yield can be increased.

Description

technical field [0001] The invention belongs to the prevention and control technology of heavy metal pollution of agricultural products. Background technique [0002] Since the 1950s, with the substantial increase in population, the rapid development of industries such as mining, smelting and manufacturing, the extensive use of agricultural chemicals and the discharge of urban sewage and sewage, resulting in the harmful effects of Cd, Pb, Hg, Cu, etc. Biotoxic metal elements are rapidly and excessively accumulated in the environment. This environmental pollution problem caused by human activities has attracted widespread attention. Most of these metal elements are summarized together and are called "heavy metals". element. Among the various heavy metal elements, cadmium (Cd) is one of the most concerned elements, because Cd is easily absorbed by plants and is often enriched in the human body through the food chain. [0003] Cd is extremely toxic to the human body and is ea...

Claims

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Application Information

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IPC IPC(8): A01C21/00
Inventor 刘建国马新美王明新
Owner CHANGZHOU UNIV
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