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    Preliminary research on evaluation index system for comprehensive potential of natural resources in China
    DING Shou-yi, JIA Qi-qi, LI Qing-jia, LIU Ze-jin
    HUBEI AGRICULTURAL SCIENCES    2024, 63 (9): 15-21.   DOI: 10.14088/j.cnki.issn0439-8114.2024.09.004
    Abstract201)      PDF (5477KB)(28)       Save
    Taking into account the administrative management requirements for unified and classified natural resources, the development potential of land, forest, grassland, wetland and water resources was evaluated based on resource attributes, natural conditions and disaster risk. On this basis, a systematic, reasonable and objective evaluation index system for comprehensive potential of natural resources was constructed. Combining multiple statistical data and remote sensing data, the comprehensive potential of natural resources of Chinese provincial-level regions was evaluated, and potential zoning was conducted using the dominant factor method. The empirical results showed that the western region, the middle and lower reaches of the Yangtze River, and the northeast had high comprehensive potential of natural resources; and regions with low comprehensive potential of natural resources such as Beijing and Tianjin needed to leverage their economic development advantages. The evaluation index system for the comprehensive potential of natural resource proposed in this study was applicable to the evaluation of natural resource development potential in regions of different scales, and could effectively identify the types of superior natural resources in regions, which provided support for local natural resource management and optimization adjustment of main functional areas.
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    Enrichment characteristics of selenium and cadmium in farmland soil-rice system and their relationships in the Nandu River basin
    SHEN Lin-li, LUO Song-ying, LIANG Zhi-peng, LIANG Xiao-qi, LIN Qian-ce
    HUBEI AGRICULTURAL SCIENCES    2024, 63 (9): 22-27.   DOI: 10.14088/j.cnki.issn0439-8114.2024.09.005
    Abstract163)      PDF (4250KB)(14)       Save
    Selenium (Se) and Cadmium (Cd) contents in 80 samples of farmland topsoil and rice in the Nandu River basin were determined. The enrichment characteristics of Se and Cd in the soil-rice system were analyzed using bioenrichment coefficients, and the interrelationships among Se content, Cd content, pH value and organic carbon content of topsoil and rice were analyzed using Pearson coefficient analysis. The results showed that, the farmland soil of the study area met the standards for sufficient and rich selenium, and 40% of the rice samples met the Se rich rice standard. The Cd content in the soil did not exceed the national agricultural land pollution risk screening value (0.300 mg/kg), and the Cd content in rice was less than the national food safety standard value (0.200 mg/kg), indicating no Cd pollution in the study area. The Se content in the soil-rice system in the study area showed a normal distribution, with an obvious segmentation phenomenon. Cd content was strongly influenced by external interference and was unevenly distributed in space. Both Se and Cd elements were moderately enriched in rice, with rice having a stronger ability to enrich Cd than Se. The Se rich soil in the study area was closely related to the local acidic soil environment and high organic carbon content. In summary, the farmland soil Se resources in the Nandu River basin were abundant, and there was no phenomenon of “se-rice and cd-unpvlluted rice”. It could be developed and utilized to produce green Se rich agricultural products.
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