西鄂尔多斯4种荒漠珍稀灌木根际土壤养分特征
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内蒙古自治区自然科学基金项目“西部荒漠灌木萌发对策及生态适应性研究”(2009BS0508);内蒙古师范大学科研基金项目(ZRYB08020)


Soil Nutrition in Rhizosphere of Four Desert Rare Shrub Species in Western Ordos
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    摘要:

    选取西鄂尔多斯荒漠的沙冬青、四合木、半日花和长叶红砂这4种珍稀超旱生灌木,研究了其根际与非根际土壤有机质、全氮、全磷的含量特征及土壤pH值的变化。结果表明,相对于非根际土壤,根际土壤有机质、全氮、全磷平均提高了26.8%,19.2%和13.9%,土壤pH值平均降低了0.23个单位。除半日花外,其它3种灌木根际与非根际的土壤养分均呈现出显著差异,并表现出明显的正根际效应(根际土壤/非根际土壤>1)。4种荒漠灌木的根际对土壤养分均具有富集效应,根际土壤养分的富集有利于荒漠土壤环境的改善和恢复。

    Abstract:

    Four rare shrubs found in west Ordos,including Ammopitanthus mongolicus,Tetraena mongolica,Helianthemum songoricum,and Reaumuria trigyna,were selected to study the variations of organic matter content,total N,total P and soil pH in soils of the rhizosphere and surrounding matrices. The results show that the contents of organic matter,total N,and total P of the soils in the rhizosphere were 26. 8%,19. 2%,and 13. 9%,respectively,higher than those in the surrounding matrices,while the soil pH value was 0. 23 unit lower than the average. Except for H.songoricum,soil nutrition in the rhizosphere differed significantly from that in the surrounding matrices,showing that the three shrubs have positive rhizosphere effects on soil nutrients. The rhizosphere of the four shrubs showed positive effects on nutrient enrichment,providing potential benefits to improve and restore the desert soil environment.

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张颖娟,贺寅月,王斯琴花.西鄂尔多斯4种荒漠珍稀灌木根际土壤养分特征[J].水土保持通报,2012,(2):52-55

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  • 收稿日期:2011-10-02
  • 最后修改日期:2011-11-16
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  • 在线发布日期: 2014-11-25
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