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    Home > Biochemistry News > Biotechnology News > Rescue heavy metal pollution: "reducing heavy" arable land is hard to say

    Rescue heavy metal pollution: "reducing heavy" arable land is hard to say

    • Last Update: 2021-08-17
    • Source: Internet
    • Author: User
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    A battle to save farmland contaminated by heavy metals is starting


    In mid-June, rice is tilling


    At present, the application of lime on heavy metal-contaminated farmland in Changsha County is fully carried out by professional teams, professional cooperatives or farmers by spraying lime by themselves


    In the near future, such large-scale farmland restoration work will continue in many parts of Hunan


    The curtain of farmland restoration has begun


    However, in a recent interview with a reporter from China Science Daily, many experts believe that the pilot work is a good start, but the restoration of contaminated farmland is a long-term and complex task.


    Technology is more important than capital

    The Changzhutan farmland restoration pilot project is in full swing


    The relevant person in charge of the Changsha County Agriculture Bureau introduced that, in addition to applying lime, they will also use organic fertilizers, spraying foliar fertilizers, deep plowing and changing the soil, and planting milk vetch to improve the soil and optimize the moisture of the cultivated land.


    Obviously, the enthusiasm of local governments has been stimulated after the central government has arranged special funds to subsidize the pilot areas


    Chen Tongbin, director of the Environmental Remediation Research Center of the Institute of Geographical Sciences and Natural Resources Research of the Chinese Academy of Sciences, believes that phytoremediation is the most effective way to remediate and remove heavy metal contaminated farmland


    He expressed his appreciation for the positive attitude of the Chang-Zhu-Tan area in Hunan Province to launch the comprehensive treatment of heavy metal-contaminated cultivated land.


    He believes that for the restoration of heavy metal contaminated farmland, researchers were faced with the problem of lack of money to support technology research and development and engineering demonstrations.


    Cai Chao, an associate researcher at the Institute of Urban Environment, Chinese Academy of Sciences, also agreed


    Management work must be emphasized

    For this pilot work, Chen Tongbin said that when sufficient funds are available, management work must also be paid attention to


    He believes that the relevant competent authorities need to make clear that such a huge pilot work needs to clarify whether the talent team is sufficient.


    Chen Tongbin believes that, after all, in the past, our country did not have accumulation in this area and no relevant management experience.


    Cai Chao believes that in carrying out the treatment of contaminated farmland in different regions, the situation should be ascertained first.
    The restoration project should not be launched blindly.
    The restoration technology should be demonstrated, field experiments should be carried out, and feasible restoration plans should be designed according to the specific conditions
    .

    Standardization and participation

    If the Chang-Zhu-Tan pilot work achieves good results, can it be promoted nationwide as soon as possible? In this regard, Cai Chao said that because China's early-stage technology and talent reserves are insufficient, the development process should not be too aggressive, and the difficulties in progress should be considered more fully
    .

    Chen Tongbin put forward suggestions from his own practical perspective
    .
    His team has carried out the remediation of heavy metal contaminated soil for more than 20 years, and has completed 7 remediation demonstration projects in Guangxi, Yunnan, Henan, Hunan and other places.
    The largest project area reaches 1280 mu, both in terms of scale and technical indicators.
    The leading farmland soil remediation project at home and abroad
    .

    "From a few acres and dozens of acres to thousands of acres is a different concept.
    A few acres and dozens of acres can be directly completed by researchers and graduate students, and hundreds or thousands of acres must be handled by farmers
    .
    In doing so, whether the technology is mature, whether the farmers can master it, whether the technology is standardized, whether it has stability, etc.
    , all need to be carefully studied and considered
    .
    Only by standardizing and standardizing engineering technology can farmers master this technology
    .
    " Chen Tongbin said
    .

    Cai Chao also said that in order to further promote it, it is necessary to increase the training of farmers, including the improvement of skills, environmental awareness, farming level, etc.
    , "only the active participation of farmers can maximize the effect of farmland restoration
    .
    "

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