论文部分内容阅读
为研究石漠化综合治理对喀斯特高原山地土壤生态系统的影响,以贵州省毕节鸭池示范区石桥小流域为例,结合石漠化综合治理工作的开展,对小流域内的土壤侵蚀状况、土壤理化性质和土壤呼吸强度等进行动态监测,探讨土壤生态系统的演变规律。结果表明:通过采取一系列的生物工程措施,小流域内土壤侵蚀得到控制,各种水土保持措施减沙效果明显,从而减少负熵的输出,使系统向“有序”状态发展;通过对不同等级石漠化土壤有机质及C/N比值的研究,得出土壤有机质与全氮含量呈显著相关性(P<0.01),随着石漠化综合治理的开展,土壤肥力结构得到优化;土壤呼吸强度在某种程度上也可以作为反映石漠化综合治理综合效应的间接指标,但这种相关性还有待进一步论证。通过以上研究旨在提高生态监测整体能力,为喀斯特石漠化综合治理提供决策支持。
In order to study the impact of integrated management of rocky desertification on soil ecosystem in mountainous areas of Karst Plateau, taking Shiqiao catchment in Biji dune demonstration area of Bijie County, Guizhou Province as an example, combining with the comprehensive management of rocky desertification, , Soil physical and chemical properties and soil respiration intensity dynamic monitoring, to explore the evolution of soil ecosystems. The results showed that by taking a series of bioengineering measures, soil erosion in small watershed was controlled and various sand and soil conservation measures were effective to reduce sediment, thus reducing the output of negative entropy and making the system develop toward “orderly” Soil organic matter and total nitrogen content were significantly correlated with soil organic matter and C / N ratio in different grades of rocky desertification (P <0.01). With the comprehensive management of rocky desertification, the soil fertility structure was optimized. To some extent, soil respiration intensity can also serve as an indirect indicator of the comprehensive effect of integrated management of rocky desertification. However, this correlation needs to be further demonstrated. The above research aims to improve the overall capacity of ecological monitoring and provide decision support for the comprehensive management of karst rocky desertification.