Method for safely planting crops on manganese contaminated soil
A technology for polluting soil and crops, applied in the field of safely planting crops on manganese-contaminated soil, can solve problems such as affecting crop planting
Inactive Publication Date: 2017-08-22
HUNAN UNIV OF SCI & TECH
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Problems solved by technology
[0003] Based on this, it is necessary to provide a method for safely planting crops on manganese-contaminated soils in view of the problem that manganese-contaminated soils affect crop cultivation
Method used
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Embodiment 1
[0046] Soak corn stalks in saturated lime water for 48 hours, take them out, and then pyrolyze them at 200°C for 3 hours under anoxic conditions. After pyrolysis and cooling, they are pulverized to obtain improved corn stalk biochar.
Embodiment 2
[0048] Soak wheat straw in saturated lime water for 48 hours, remove it, and then pyrolyze it at 300°C for 2 hours under anoxic conditions. After pyrolysis and cooling, it is pulverized to obtain improved wheat straw biochar.
Embodiment 3
[0050] Soak rice straw in saturated lime water for 36 hours, remove it, and then pyrolyze it at 400°C for 1.5 hours under anoxic condition, and pulverize it after pyrolysis cooling to obtain improved rice straw biochar.
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The invention discloses a method for safely planting crops on manganese contaminated soil. The method comprises the following steps that straw is soaked in an alkaline solution for 1-2 days and subjected to pyrolysis for 1-2 hours at the temperature of 200-600 DEG C under the low-oxygen or anoxic condition after being taken out of the alkaline solution, pyrolysis cooling and smashing are conducted in sequence, and improved straw charcoal is obtained. The improved straw charcoal is applied to the manganese contaminated soil, and radix phytolaccae is planted dispersedly. The next year the radix phytolaccae grows, the crops are interplanted between the plants of the radix phytolaccae. The method for safely planting the crops on the manganese contaminated soil is provided by adopting the mode of applying the improved straw charcoal, planting the manganese hyperaccumulator radix phytolaccae and then interplanting other crops, so that safety production is achieved while the manganese contaminated soil is remedied, and the high soil utility value is obtained.
Description
technical field [0001] The invention relates to the field of contaminated soil treatment, in particular to a method for safely planting crops on manganese-contaminated soil. Background technique [0002] As an important mineral resource, manganese (Mn) is being exploited and consumed at an unprecedented speed in our country. With the mining of manganese ore and the disorderly discharge of "three wastes", the content of heavy metals mainly Mn in the surrounding soil is too high, and soil acidification caused by external factors such as acid rain can also increase the concentration of soluble Mn in the soil. Excessive Mn in soil will reduce plant productivity, affect its yield and quality. Existing studies have shown that excessive Mn in the soil will inhibit the absorption of some essential elements such as Ca, Mg, and Fe by plants, and eventually lead to a decrease in the synthesis of chlorophyll and a decrease in photosynthetic efficiency; at the same time, Mn will also ca...
Claims
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IPC IPC(8): B09C1/00A01G1/00
CPCB09C1/00
Inventor 陈国梁冯涛陈章李志贤陈远其
Owner HUNAN UNIV OF SCI & TECH
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