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以黑河中游6种典型土地覆被类型(百年灌溉农田、新垦灌溉农田、人工杨树林、人工樟子松林、人工梭梭灌木林和天然荒漠草地)为研究对象,对其部分土壤生态水文和植被因子进行了测定。结果显示,6种土地覆被类型不仅在地表生态水文环境特征、土壤结构特征、土壤化学和微生物群落特征等方面存在显著差异,而且在植被的盖度、密度和生物量方面也存在显著差异。不同土地覆被类型的植物生物量与田间持水量、土壤黏粉粒含量、土壤全氮、土壤有机碳和土壤碳氮比等因子具有密切的关系。该研究为如何通过改变土地覆被方式而有效地保护和利用绿洲荒漠系统提供了一定的思路,也为进一步解析气候变化和人类活动影响下荒漠绿洲生态系统水、土、气、生的相互作用过程及其机制提供了一定的科学依据。
Six typical land cover types (one hundred years of irrigated farmland, newly planted irrigated farmland, artificial poplar forest, artificial Pinus sylvestris var. Mongolica, artificial Haloxylon ammodendron forest and natural desert grassland) in the middle reaches of the Heihe River were selected as the research object. Some of the soil eco-hydrology and vegetation Factors were measured. The results show that the six types of land cover not only have significant differences in the characteristics of the surface ecological and hydrological environment, soil structure, soil chemistry and microbial community characteristics, but also have significant differences in vegetation cover, density and biomass. The plant biomass of different land cover types is closely related to field water holding capacity, soil clay content, soil total nitrogen, soil organic carbon and soil carbon and nitrogen ratio. The study provides some ideas on how to effectively protect and utilize oasis desertification system by changing the land cover method, and also to further analyze the interaction between climate change and water, soil, air and ecosystem in the desert oasis ecosystem under the influence of human activities The process and its mechanism provide a certain scientific basis.