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Fertilizer capable of controlling rice cadmium accumulation and preparation method thereof

A fertilizer and rice technology, which is applied to the field of fertilizer for controlling cadmium accumulation in rice and its preparation, can solve the problems of high cost, large usage amount and high price, and achieve the effects of low usage cost, low usage amount and easy operation.

Inactive Publication Date: 2013-04-10
CHINA NAT RICE RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the use of chelated divalent metals is relatively large, and the price is high, resulting in high costs

Method used

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  • Fertilizer capable of controlling rice cadmium accumulation and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 1) Use a pulverizer to pulverize the rice straw to 60-mesh powder;

[0028] 2) Grind sulfur into 200 mesh powder;

[0029] 3) Mix 50 kg of rice straw, 1 kg of sulfur and 1 kg of sodium hydroxide evenly, add 20 kg of water, mix thoroughly, place in a cement tank, ferment at room temperature for 15 days, or sterilize at >100°C Boil for 2 hours to obtain a fertilizer that controls the accumulation of cadmium in rice;

[0030] The rice straw in the above step 1) is replaced with one of barley straw, rape straw, wood chips, weed straw, milk vetch straw, alfalfa straw, waste paper or water hyacinth; the sulfur in step 2) is replaced with sodium sulfide, One of potassium sulfide, calcium sulfide, pyrite, marcasite, pyrrhotite, gypsum, ammonium sulfate, ferrous sulfate, ferric sulfate, potassium sulfate, sodium sulfate, calcium sulfate, and magnesium sulfate; step 3) Sodium hydroxide is replaced with a kind of in potassium hydroxide, calcium oxide and calcium hydroxide, and i...

Embodiment 2

[0033] 1) Use a pulverizer to pulverize barley straw and waste paper into 300-mesh powder;

[0034] 2) Grinding pyrrhotite and gypsum into 60-mesh powder;

[0035] 3) Mix 30 kg of large wheat straw and waste paper, 5 kg of pyrrhotite and gypsum, 10 kg of calcium hydroxide and calcium oxide, add 22.5 kg of water, and ferment at room temperature for >15 days, or at >100 Cooking at ℃ for 5 hours to obtain a fertilizer for controlling the accumulation of cadmium in rice;

[0036] In the above step 1), the barley straw can also be cut into small pieces of 0.1, 20, 80 or 100 mm; in the step 2), the pyrrhotite and gypsum are ground into 80, 200 or 300 mesh powder; in the step 3), natural fermentation 1 month, 2 months or 3 months; It also can obtain the technical effect identical with embodiment 2 at last.

[0037]

Embodiment 3

[0039] 1) Use a pulverizer to crush the water hyacinth into a powder of <60 mesh;

[0040] 2) Grinding marcasite into <60 mesh powder;

[0041]3) Mix 10 kg of water hyacinth, 5 kg of marcasite, and 10 kg of potassium hydroxide, add 10 kg of water, ferment at room temperature for 72 hours, or digest at >100°C for 3 hours to obtain controlled rice cadmium accumulated fertilizer;

[0042] In embodiment 3, by 100 kilograms of water hyacinth, 25 kilograms of marcasite, 15 kilograms of potassium hydroxide, 70 kilograms of water; Or by 100 kilograms of water hyacinth, 50 kilograms of marcasite, 20 kilograms of potassium hydroxide, 170 kilograms of water; Or By 100 kilograms of water hyacinth, 1 kilogram of marcasite, 0.1 kilogram of potassium hydroxide, 20 kilograms, it also can obtain the technical effect identical with embodiment 3 at last.

[0043]

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Abstract

The invention discloses a fertilizer capable of controlling rice cadmium accumulation and a preparation method of the fertilizer, and belongs to the technical field of fertilizers. The fertilizer is prepared by the following raw materials based in part by weight: 100 parts of organic matter based on 10% of moisture content, 1-50 parts of sulfur source based on sulfur, 0.1-20 parts of strong base, and water which is 20-100% of the total weight of the organic matter, the sulfur source and the strong base. Compared with the prior art, the fertilizer is economic and effective. The fertilizer can be combined with the traditional sulfur fertilizer application technology, so that peasants can accept the fertilizer, and the operation procedures are easier.

Description

technical field [0001] The invention belongs to the technical field of fertilizers, and in particular relates to a fertilizer for controlling cadmium accumulation in rice and a preparation method thereof. Background technique [0002] As a toxic heavy metal, cadmium has become more and more polluting to crops, and the polluted area of ​​farmland is expanding day by day, which has aroused widespread concern in the society. In recent years, due to industrial "three wastes", sewage irrigation, and large-scale application of pesticides and fertilizers, the pollution of heavy metals in farmland has intensified, and the safety of heavy metals in rice has become increasingly prominent. According to the results of the 2002 and 2003 rice quality and safety surveys conducted by the Rice and Product Quality Supervision, Inspection and Testing Center of the Ministry of Agriculture, one of the quality and safety problems of rice is that heavy metals such as cadmium and lead exceed the st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G1/00
Inventor 邵国胜沈希宏王静
Owner CHINA NAT RICE RES INST
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