XIAO Jie,XIONG Kangning,GU Zaike,et al.Comparative Study on Comprehensive Evaluation of Soil Nutrients in Rocky Desertification Areas—A Case Study of Small Watersheds of Chaoying and Dingtan in Guizhou Province[J].Research of Soil and Water Conservation,2018,25(02):293-299.
喀斯特石漠化治理区土壤养分综合评价与对比——以贵州朝营和顶坛小流域为例
- Title:
- Comparative Study on Comprehensive Evaluation of Soil Nutrients in Rocky Desertification Areas—A Case Study of Small Watersheds of Chaoying and Dingtan in Guizhou Province
- 分类号:
- S158.3;P931.5
- 摘要:
- 为揭示不同地貌和不同等级石漠化地土壤养分状况及其整体水平。通过分析土壤养分指标和运用数理统计确立最小数据集，以不同地貌的研究区和不同等级石漠化的治理模式地进行了评价和对比。结果表明：（1）入选最小数据集体系的指标为土壤pH值、全氮、有机质、速效钾，是影响土壤养分评价和植物生长所需养分的指标。（2）受不同石漠化治理模式影响，土壤养分累积效应明显，朝营小流域不同等级石漠化地评价分值大小为潜在0.729 > 轻度0.658 > 中度0.580 > 强度0.525，顶坛小流域则为轻度0.541 > 潜在0.515 > 中度0.501 > 强度0.341。（3）经过评价对比，朝营小流域土壤养分综合评价分值（0.673）大于顶坛小流域（0.478），两者受不同地貌、不同土层厚薄和土被连续性以及不同的石漠化治理模式等因素影响是明显的。随着石漠化治理模式不断优化和调整，朝营、顶坛小流域土壤养分的积累仍有上升的潜力。
- Abstract:
- In order to reveal the soil nutrient status and its overall level in rocky desertification areas with different landforms and grades, through the analysis of soil nutrient index and application of mathematical statistics, the minimum data set was established, and the soil nutrients were evaluated and compared in different geomorphic study areas and different degrees of rocky desertification. The results showed that:(1) the selected indexes of minimum data set were soil pH value, total nitrogen, organic matter and available potassium, which were the indexes to influence soil nutrient evaluation and required nutrients vegetation; (2) affected by different rocky desertification control models, soil nutrient accumulation effect was obvious, the evaluation score of Chaoying small watershed in different rocky desertification area was in the sequence:potential 0.729 > mild 0.658 > moderate 0.580 > strong 0.525, while the Dingtan small watershed was in the order:mild 0.541 > potential 0.515 > moderate 0.501 > strong 0.341; (3) through evaluation comparison, the soil nutrient comprehensive grade of Chaoying small watershed (0.673) was larger than soil nutrient comprehensive grade (0.478) of Dingtan; both were affected by different landforms, soil layer thickness, regolith continuities and rocky desertification governance model obviously. With the optimization and adjustment of rocky desertification governance model, the soil nutrient accumulation in Chaoying and Dingtan small watershed still has the potential to rise.
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备注/Memo
收稿日期:2017-5-16;改回日期:2017-6-20。
基金项目:国家十三五重点研发计划“喀斯特高原综合治理生态产业模式与技术集成示范”（2016YFC0502607）；贵州省研究生教育创新计划项目“贵州省熊康宁喀斯特环境研究生导师工作室建设”（黔教研全GZS字[2016]04号）；贵州师范大学研究生创新资助项目（2016[31]）
作者简介:肖杰(1991-),男,贵州威宁人,在读硕士,研究方向为喀斯特区域经济与生态建设。E-mail:mhxj47@163.com
通讯作者:熊康宁(1958-),男,贵州威宁人,教授,硕士,主要从事喀斯特石漠化生态治理、世界自然遗产申报等方面的研究。E-mail:xiongkn@163.com