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A kind of compound heavy metal passivator containing salina algal skin and using method thereof

The technology of a heavy metal passivator and salina is applied in the agricultural field to achieve the effects of improving yield and quality, increasing yield and reducing heavy metal content, and increasing yield of heavy metal content

Active Publication Date: 2021-09-07
INST OF SOIL & FERTILIZER FUJIAN ACADEMY OF AGRI SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is no report on the use of salina husk as the main raw material to passivate the activity of heavy metals in soil.

Method used

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  • A kind of compound heavy metal passivator containing salina algal skin and using method thereof
  • A kind of compound heavy metal passivator containing salina algal skin and using method thereof
  • A kind of compound heavy metal passivator containing salina algal skin and using method thereof

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Experimental program
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Effect test

Embodiment

[0018] Test design:

[0019] The experiment was arranged in a potted simulation net room of the Institute of Soil and Fertilizer, Fujian Academy of Agricultural Sciences. The soil culture pot test method was adopted, and the soil for the test was taken from the rice topsoil layer around a coal mine in Xiaohua Village, Taihua Town, Datian County, Sanming City, Fujian Province. The soil type was paddy soil in yellow mud field, and the soil fertility was medium. The total cadmium content in the soil is 0.65 mg / kg, and the total lead content is 87.3 mg / kg. The specifications of the plastic pots to be tested are: inner upper diameter 21.5 cm, inner lower diameter 14.5 cm, height 17.0 cm, and each pot contains 4 kg of air-dried soil samples (passed through a 0.5 cm sieve). 6 treatments were designed in the experiment, namely: 1) no fertilization (control); 2) chemical fertilizer (every 666.7m 2 Shi pure N12 kg, P 2 o 5 4.8kg, K 2 O6.0 kg, the same below); 3) Fertilizer + salina...

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Abstract

The invention discloses a compound heavy metal passivator containing algal husk and a method for using the same. The heavy metal passivator for soil is composed of husk granules, attapulgite and polyacrylamide, and the dosage is 500 to 1000 per mu of farmland. kg, 250~500 kg and 5~10 kg by weight and mix evenly. Among them, the main ingredient is salina husk particles obtained by drying, crushing and sieving; the auxiliary ingredients are natural mineral "attapulgite" and polymer "polyacrylamide". Its use method is to apply together with field preparation and base fertilizer before crop planting, and the dosage per mu is 1005 ~ 1510 kg. Using the salt-containing algae husk composite heavy metal passivator of the present invention can not only obviously promote the increase of crop yield, but also significantly It can reduce the absorption of heavy metals such as Cd and Pb by crops, and is especially suitable for the safe use of farmland polluted by acidic heavy metals in the red-yellow soil area of ​​southern my country.

Description

technical field [0001] The invention belongs to the field of agriculture, and in particular relates to a salt-containing algae husk composite heavy metal passivator and a use method thereof. Background technique [0002] There are two main ways to control heavy metal pollution in soil, one is to remove heavy metals from polluted soil; the other is to change the form of heavy metals in soil and reduce their migration ability and bioavailability in the environment. The representative measures of the former include engineering measures and phytoremediation measures, but the cost of engineering measures is high, the natural properties of the soil are destroyed, the target biomass of phytoremediation is low, the restoration period is long, and the follow-up disposal of plants is difficult, which makes it subject to practical application. different degrees of restriction. The representative measures of the latter are in-situ chemical passivation remediation measures. In-situ chem...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K17/40A01B79/02C09K101/00
CPCA01B79/02C09K17/40C09K2101/00
Inventor 黄东风
Owner INST OF SOIL & FERTILIZER FUJIAN ACADEMY OF AGRI SCI
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