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中国农学通报

中国农学通报 ›› 2014, Vol. 30 ›› Issue (31): 41-45.doi: 10.11924/j.issn.1000-6850.2014-1820

所属专题： 耕地保护

• 林学 园艺 园林 • 上一篇    下一篇

民勤退耕地物种多样性与土壤生物学特征及其相关性研究

魏林源,王理德,唐卫东,韩福贵,张莹花,王方琳   

  1. 甘肃省治沙研究所,甘肃民勤荒漠草地生态系统国家野外科学观测研究站；甘肃省治沙研究所；甘肃省荒漠化与风沙灾害防治重点实验室,甘肃省治沙研究所,甘肃省治沙研究所,甘肃省荒漠化与风沙灾害防治重点实验室-省部共建国家重点实验室培育基地,甘肃省治沙研究所
  • 收稿日期:2014-07-01 修回日期:2014-07-01 接受日期:2014-08-26 出版日期:2014-11-20 发布日期:2014-11-20
  • 通讯作者: 唐卫东
  • 基金资助:
    国家自然科学基金“石羊河中下游退耕地土壤系统演变规律及其驱动机制研究”(41161049)

Relationship Between the Biodiversity and Soil Biological Characteristics in the Abandoned Croplands of Minqin Oasis

  • Received:2014-07-01 Revised:2014-07-01 Accepted:2014-08-26 Online:2014-11-20 Published:2014-11-20

摘要： 为了研究退耕地植被恢复中物种多样性与生物学特征存在一定的关系，以石羊河下游民勤绿洲内退耕地为研究对象，对其物种多样性与土壤酶活性及其相关性进行分析。结果表明：（1）随着退耕地的恢复，物种的Margalef指数、Simpson指数、Shanon-wiener指数呈下降趋势，群落优势度呈先增加后减少趋势，Pielou指数、Alatalo指数呈波动式增加趋势。（2）受退耕地盐碱化影响，土壤中过氧化氢酶的含量明显高于磷酸酶、脲酶和蔗糖酶；磷酸酶、过氧化氢酶、蔗糖酶的含量随着退耕地植被的恢复呈波动式增加。而脲酶呈递减趋势，可能是因植被随退耕年限的增加使得物种趋于单一，为其提供的物质源随之减少。（3）民勤退耕地土壤酶活性与植物物种多样性存在不同程度的相关性，脲酶与各指数之间的相关性最为显著，磷酸酶次之，过氧化氢酶、蔗糖酶与各指数之间的相关性较弱。

关键词: 政策建议, 政策建议

Abstract: In order to study the certain relations between the species diversity and biology characteristics in vegetation restoration, in this paper, the abandoned croplands in Minqin oasis, the lower reaches of the Shiyang River were chosen as research object and the relationship between its biodiversity and soil enzyme activity was analyzed. The results showed that: (1) with the restoration continues, the species Margalef index, Simpson index and Shanon- wiener index showed decreasing trend, while the community dominance index first increased and then decreased; (2)influenced by salinization process in the abandoned lands, the contents of soil catalase was significantly higher than that of phosphatase, urease and invertase, the contents of phosphatase, catalase and invertase showed fluctuating increase trend with the abandoned cropland restoration, while the content of urease had a decreasing trend which maybe caused by the less material source and decreased biodiversity following cropland abandonment; (3) there was correlation between soil enzyme activity and biodiversity indexes, urease had the most significant correlation with the biodiversity indexes, followed by phosphatase, while catalase and invertase had weak correlation with the biodiversity indexes.