陕南秦巴山区厚朴群落土壤肥力评价

发布时间：2018-03-03 19:42

  本文选题：秦巴山区　切入点：厚朴群落　出处：《生态学报》2016年16期 　论文类型：期刊论文

【摘要】：以秦巴山区7个厚朴群落为对象,分析土壤养分含量的变化规律,同时对各群落土壤肥力进行评价,以期为该区土壤肥力的提高和厚朴群落配置模式的筛选提供理论依据和实践指导。结果表明,秦巴山区厚朴群落间土壤养分含量差异显著;除全磷和全钾外,随土层深度的增加,土壤有机质、全氮、碱解氮、速效磷和速效钾含量逐渐减小。厚朴群落土壤肥力综合指数从大到小依次为:4a凹叶厚朴(1.054)2a凹叶厚朴(0.882)山茱萸-凹叶厚朴混交林(0.673)7a尖叶厚朴(-0.243)7a凹叶厚朴(-0.713)杜仲-凹叶厚朴(-0.812)11a凹叶厚朴(-0.840)。因此随着林龄的增大,厚朴群落土壤肥力有下降的趋势。结合厚朴群落土壤养分差异分析和厚朴群落土壤肥力评价结果,得出山茱萸-凹叶厚朴混交林的土壤肥力相对较好,为该区植被恢复的最佳营造模式。
[Abstract]:Taking 7 Magnolia officinalis communities in Qinba Mountain area as the object, the variation of soil nutrient content was analyzed, and the soil fertility of each community was evaluated at the same time. The results showed that there were significant differences in soil nutrient content among Magnolia officinalis communities in Qinba Mountains, except total phosphorus and potassium. With the increase of soil depth, soil organic matter, total nitrogen, alkali-hydrolyzed nitrogen, The comprehensive index of soil fertility of Magnolia officinalis community was: 1. 054 ~ 2 ~ (2 a) a) Fructus Corni and Magnolia officinalis mixed forest 0.6737 ~ (7) a. Magnolia cuspidata-0. 2437a. Magnolia officinalis L. -0.812 ~ (11) a. Therefore, with the increase of forest age, The soil fertility of Magnolia officinalis community has a tendency to decrease. According to the analysis of soil nutrient difference of Magnolia officinalis community and the evaluation result of soil fertility of magnolia officinalis community, it is concluded that the soil fertility of the mixed forest of Fructus Corni and Magnolia officinalis is relatively good. It is the best construction mode for vegetation restoration in this area.
【作者单位】： 西北农林科技大学生命科学学院;陕西省水土保持生态环境监测中心;
【基金】：陕西省农业攻关项目(2013K01-06) 中医药行业科研专项(201207002) 中医药公共卫生专项(财社[2011]76号)
【分类号】：S158
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本文编号：1562421