内蒙古典型草原灌丛化与土壤性质的关系研究

发布时间：2018-04-16 15:32

本文选题：草原灌丛化 + 土壤容重　；参考：《草业学报》2017年02期

【摘要】：本文以内蒙古典型草原区有灌丛入侵及无灌丛入侵现象草地为研究对象,探讨了土壤性质与草原灌丛化现象间的关系。研究结果表明:在围封状态下,无灌丛化草地土壤粉粒、粘粒及养分(有机质、全氮、全磷)含量在0～60cm深度均显著高于灌丛化草地,而土壤容重、砂粒则显著低于灌丛化草地,且二者的差异随着土壤深度的增加而增大;在重度放牧状态下,各指标的变化趋势与围封状态相同,但差异性仅在表层0～10cm显著。草原灌丛化与表层土壤砂粒、容重呈显著正相关性,与土壤粉粒、有机质、全氮、全磷含量呈极显著负相关性。以上结果说明,草原灌丛化的出现与其分布生境的土壤特点有关。相比于草本而言,灌木在粗质贫瘠土壤中更具有竞争性。
[Abstract]:Based on the typical steppe area of Inner Mongolia has no shrub invasion and shrub grassland intrusion phenomenon as the research object, discusses the relationship between soil properties and thicketization of steppe phenomena. The results show that: in the enclosed state, no shrub grassland soil silt, clay and nutrient (organic matter, total nitrogen, total phosphorus) content in the depth of 0 ~ 60cm were significantly higher than that of shrub grassland, and the soil bulk density, sand is significantly lower than the thicketization of grassland, and the differences of the two increases with the increase of soil depth; in heavy grazing condition, the change tendency of each index and the enclosing state of the same, but the difference is only in the surface layer of 0 ~ 10cm. Thicketization of steppe soil and sand, showed a significant positive correlation with soil bulk density, silt, organic matter, total nitrogen, total phosphorus showed significant negative correlation content. These results indicated that the thicketization of steppe soil characteristics and distribution of habitats Shrubs are more competitive in rough and barren soils than in herbs.

【作者单位】：河南农业大学林学院;北京师范大学资源学院;
【基金】：国家杰出青年科学基金资助项目(41025001) 河南农业大学科研基金引进人才科研启动费资助项目(30601007)资助
【分类号】：S812

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