植被恢复对昆阳磷矿土壤有机碳储量的影响
发布时间：2019-06-13 11:29
【摘要】：植被恢复是既能保持磷矿开采同时又能有效扼制矿区生态环境的退化,并逐步恢复已退化的矿区生态系统最有效的生物措施。为揭示植被恢复对昆阳磷矿土壤有机碳和碳素积累的影响,研究探讨了昆阳磷矿不同恢复林地的土壤有机碳储量变化。结果表明:(1)不同恢复林地的土壤有机碳含量存在显著差异(p0.05),7种不同植被恢复人工林土壤平均有机碳含量分别是废弃地的14.29倍、11.83倍、11.40倍、5.89倍、15.48倍、15.59倍、18.53倍。(2)土壤有机碳在剖面的含量表现出明显的"表聚作用",均以表土层(0—20cm)最大,且随土层厚度的增加,呈下降趋势。(3)不同恢复林地的土壤有机碳密度差别较大,变化趋势和土壤有机碳含量的变化趋势一致,且在同一林分土壤中,单位深度土壤各土层平均有机碳密度均以表层最大,随土层的增加而降低。(4)土壤有机碳主要存储于0—20cm土层中,平均含量为53.60%,随着土层的加深,土壤有机碳所占比重急剧下降,经过植被恢复,7种人工林土壤有机碳储量较废弃地0—20cm土壤有机碳储量提高了26.53%,20.39%,34.48%,10.81%,28.62%,39.52%,36.71%,说明目前矿区通过植被恢复后的土壤状况显著优于未进行恢复措施的废弃地。
[Abstract]:Vegetation restoration is the most effective biological measure which can not only maintain phosphate rock mining, but also effectively curb the degradation of ecological environment in mining area, and gradually restore the degraded mining area ecosystem. In order to reveal the effect of vegetation restoration on soil organic carbon and carbon accumulation in Kunyang phosphate rock, the changes of soil organic carbon reserves in different restored forest land of Kunyang phosphate rock were studied and discussed. The results showed that: (1) there were significant differences in soil organic carbon content among different restored forest lands (p0.05). The average soil organic carbon content of seven different vegetation restoration plantations was 14.29 times, 11.83 times, 11.40 times, 5.89 times, 15.48 times, 15.59 times and 18.53 times higher than that of wasteland, respectively. (2) the content of soil organic carbon in the profile showed obvious "surface accumulation", (2) the soil organic carbon content in the profile was 14.29 times, 11.83 times, 11.40 times, 5.89 times, 15.48 times, 15.59 times and 18.53 times higher than that in wasteland, respectively. The topsoil layer (0-20cm) was the largest, and decreased with the increase of soil thickness. (3) the soil organic carbon density of different restored forest land was quite different, and the change trend was consistent with the change trend of soil organic carbon content, and the average organic carbon density of each soil layer per unit depth was the highest in the same stand soil. It decreased with the increase of soil layer. (4) soil organic carbon was mainly stored in 0-20cm soil layer with an average content of 53.60%. With the deepening of soil layer, the proportion of soil organic carbon decreased sharply. After vegetation restoration, the soil organic carbon storage of seven plantations increased by 26.53%, 20.39%, 34.48%, 10.81%, 28.62% and 39.52%, respectively. 36.71%, indicating that the soil condition after vegetation restoration in mining area is significantly better than that in abandoned land without restoration measures.
【作者单位】： 云南省林业科学院;
【基金】：国家自然科学基金项目“云南磷矿废弃地植被修复土壤质量演变机理研究”(41361076)
【分类号】：S714.2
[Abstract]:Vegetation restoration is the most effective biological measure which can not only maintain phosphate rock mining, but also effectively curb the degradation of ecological environment in mining area, and gradually restore the degraded mining area ecosystem. In order to reveal the effect of vegetation restoration on soil organic carbon and carbon accumulation in Kunyang phosphate rock, the changes of soil organic carbon reserves in different restored forest land of Kunyang phosphate rock were studied and discussed. The results showed that: (1) there were significant differences in soil organic carbon content among different restored forest lands (p0.05). The average soil organic carbon content of seven different vegetation restoration plantations was 14.29 times, 11.83 times, 11.40 times, 5.89 times, 15.48 times, 15.59 times and 18.53 times higher than that of wasteland, respectively. (2) the content of soil organic carbon in the profile showed obvious "surface accumulation", (2) the soil organic carbon content in the profile was 14.29 times, 11.83 times, 11.40 times, 5.89 times, 15.48 times, 15.59 times and 18.53 times higher than that in wasteland, respectively. The topsoil layer (0-20cm) was the largest, and decreased with the increase of soil thickness. (3) the soil organic carbon density of different restored forest land was quite different, and the change trend was consistent with the change trend of soil organic carbon content, and the average organic carbon density of each soil layer per unit depth was the highest in the same stand soil. It decreased with the increase of soil layer. (4) soil organic carbon was mainly stored in 0-20cm soil layer with an average content of 53.60%. With the deepening of soil layer, the proportion of soil organic carbon decreased sharply. After vegetation restoration, the soil organic carbon storage of seven plantations increased by 26.53%, 20.39%, 34.48%, 10.81%, 28.62% and 39.52%, respectively. 36.71%, indicating that the soil condition after vegetation restoration in mining area is significantly better than that in abandoned land without restoration measures.
【作者单位】： 云南省林业科学院;
【基金】：国家自然科学基金项目“云南磷矿废弃地植被修复土壤质量演变机理研究”(41361076)
【分类号】：S714.2
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