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Soil conditioner capable of effectively reducing accumulation of cadmium and arsenic in rice as well as preparation method and application of soil conditioner

A soil conditioner and a technology for cadmium in rice are applied to the field of soil conditioner for accumulation of cadmium and arsenic in rice and the field of preparation thereof, which can solve the problems of lowering soil pH, lowering soil arsenic activity, unreasonable combination application and the like, achieving simple formula and reducing cadmium The effect of arsenic accumulation, wide application value

Pending Publication Date: 2021-07-09
HUNAN INST OF AGRI ENVIRONMENT & ECOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Decrease soil pH, soil arsenic activity decreases, cadmium activity increases), it is often difficult to grasp the simultaneous passivation effect of cadmium and arsenic
If the two raw materials are simply mixed, the simultaneous passivation effect on cadmium and arsenic is not stable, and it is not easy to control, and unreasonable application will lead to a decrease in crop yield

Method used

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  • Soil conditioner capable of effectively reducing accumulation of cadmium and arsenic in rice as well as preparation method and application of soil conditioner
  • Soil conditioner capable of effectively reducing accumulation of cadmium and arsenic in rice as well as preparation method and application of soil conditioner
  • Soil conditioner capable of effectively reducing accumulation of cadmium and arsenic in rice as well as preparation method and application of soil conditioner

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The process of the present embodiment is: a soil conditioning agent of the present invention consists of 1 part by weight of the following table:

[0041] Table 1

[0042]

[0043] Indoor soil culture test, select a cadmium arsenic composite contamination soil, the basic properties are as follows:

[0044] PH 5.5; effective cadmium 0.41 mg / kg; total cadmium is 0.83 mg / kg; total arsenic is 62.7mg / kg

[0045] The test of this embodiment has a total of the following three processing.

[0046] CK: Rice + cadmium arsenic composite contamination soil

[0047] T1: Rice + cadmium arsenic composite contaminated soil + 2000kg / HA composite passivation material

[0048] T2: Rice + cadmium arsenic composite contaminated soil + 3000kg / ha composite passivation material

[0049] After 7 days, soil culture was cultured, and the germinated rice seedlings were transferred, and the 30D was tested. The results are as follows: as shown in the 1-A portion in 1, each of the CK, T1, T2 ...

Embodiment 2

[0051] The process of the present embodiment is: a soil conditioner of the present invention, composed of a component of the following table:

[0052] Table 2

[0053]

[0054] Field Daejeon Test, siting Zhejiang Jinhua, selecting the soil of mild cadmium arsenic composite pollution, the basic nature is as follows:

[0055] PH 5.0; effective cadmium 0.22 mg / kg; total cadmium was 0.42 mg / kg; total arsenic was 20.2 mg / kg, effective arsenic was 1.1 mg / kg.

[0056] The test of the present embodiment has a total of 2 processes.

[0057] CK: Rice + cadmium arsenic composite contamination soil

[0058] T1: Rice + cadmium arsenic composite contaminated soil + 3000kg / HA above the above passivation material

[0059] Rice branching period sampling analysis of cadmium and arsenic accumulation in stems and leafs, and sampling the rice cadmium arsenic after rhyme, and the results are as follows figure 2 As shown: The cadmium in the rice stem leaf is reduced by 70% compared to CK, an...

Embodiment 3

[0061] The process of the present embodiment is: a soil conditioning agent of the present invention, composed of components of the weight of the table 3:

[0062] table 3

[0063]

[0064] Field Daejeon trial, selection of Changsha Liuyang, selecting cadmium arsenic composite pollution soil, the basic nature is as follows:

[0065] PH 6.3; effective cadmium 0.32mg / kg; total cadmium is 0.78 mg / kg; total arsenic is 53.2mg / kg

[0066] The test of the present embodiment has a total of 5 processing.

[0067] CK: Rice + cadmium arsenic composite contamination soil

[0068] T1: Rice + cadmium arsenic composite contaminated soil + 1500 kg / ha composite passivation materials

[0069] T2: Rice + cadmium arsenic composite contamination soil + 2000kg / ha composite passivation material

[0070] T3: Rice + cadmium arsenic composite contamination soil + 2500 kg / ha composite passivation material

[0071] T4: Rice + cadmium arsenic composite contamination soil + 3000kg / ha composite p...

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Abstract

The invention provides a soil conditioner capable of effectively reducing accumulation of cadmium and arsenic in rice. The soil conditioner comprises the following components: 80-120 parts of ferric nitrate, 15-25 parts of metal sulfide, 60-80 parts of activated Portland cement, 1-2 parts of GLDA-Zn / Mn and 35-60 parts of a calcium source; effective cadmium and arsenic in soil can be remarkably reduced, and the effective cadmium and arsenic in the soil can be reduced by 40% and 39%; meanwhile, the cadmium and arsenic accumulation in the rice stems and leaves can be remarkably reduced, the cadmium and arsenic reduction amplitude can reach 42% and 44% under the small application amount, and the cadmium accumulation in the medium-light combined pollution rice is lower than the national safety threshold value. The soil conditioner disclosed by the invention is simple in formula, can be suitable for soil with different pH ranges, and has a relatively wide application value.

Description

Technical field [0001] The present invention belongs to the field of soil governance, and therefore specifically involves a soil conditioning agent that effectively reducing the accumulation of rice with rice in cadmium arsenic composite contamination and its preparation methods and applications. Background technique [0002] With the development of modern industrialization and urbanization, human activities have led to increasing heavy metal pollution in the soil environment. my country's soil is seriously contaminated, according to the 2008 National Environmental Protection Department provides data, received by heavy metal contaminated with CD, AS, PB, etc. Nearly 2.0 * 10 7 HM 2 About 1 / 5 of total cultivated land, including 1.0 * 10 in which "industrial three waste" pollution has 1.0 * 10 7 HM 2 , Farmland with sewage irrigation is 3.3 * 10 6 HM 2 , More than 1.2 * 10% of heavy metal contaminated every year 7 T, the direct economic loss caused by more than 20 billion yuan. The...

Claims

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Application Information

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IPC IPC(8): C09K17/40C09K101/00
CPCC09K17/40C09K2101/00
Inventor 官迪纪雄辉吴家梅谢运河陈山田发祥陈锦
Owner HUNAN INST OF AGRI ENVIRONMENT & ECOLOGY