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中国农学通报

中国农学通报 ›› 2015, Vol. 31 ›› Issue (14): 226-231.doi: 10.11924/j.issn.1000-6850.casb14120145

• 资源 环境 生态 土壤 气象 • 上一篇    下一篇

民勤盐渍荒漠草地盐爪爪群落和芦苇群落的季相变化特征

周兰萍,杨俊,贺访印,纪永福,魏怀东,李亚,张晓娟   

  1. 甘肃省治沙研究所,甘肃省水利厅水土保持局,甘肃省治沙研究所,甘肃省治沙研究所,甘肃省治沙研究所,甘肃省治沙研究所,甘肃省治沙研究所
  • 收稿日期:2014-12-22 修回日期:2015-01-23 接受日期:2015-01-23 出版日期:2015-06-02 发布日期:2015-06-02
  • 通讯作者: 张晓娟
  • 基金资助:
    国家自然科学基金“民勤荒漠绿洲过渡带白刺灌丛沙堆表面风沙流特征与沙堆形成演”(41361001)；甘肃省杰出青年基金“石羊河下游近地面0-50m沙尘理化特征及其对区域地表景观异质性的响应”(145RJDA327)；甘肃省青年科技基金计划“石羊河流域综合治理工程生态效益监测评估”(145RJYA262)；国家自然基金项目“石羊河尾闾（青土湖）水面形成的生态效应研究”(31160116)；国家青年基金项目“沙区粘土质夹层土壤水分再分布与植物的生态响应”(31100519)。

Characteristics of Seasonal Variation of Kalidium foliatum Community and Phragmites communis Community of Saline Desert Grassland in Minqin

  • Received:2014-12-22 Revised:2015-01-23 Accepted:2015-01-23 Online:2015-06-02 Published:2015-06-02

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摘要： 为了掌握民勤荒漠草地盐生植物群落的季相变化特征，为民勤荒漠草地保护、生产力的恢复与合理利用提供科学依据。采用样线法和样方法对民勤盐渍荒漠草地盐爪爪群落和芦苇群落进行调查，通过对5月、7月和9月调查数据的统计，分析2个群落的组成及季相变化特征。结果表明：民勤荒漠草地盐生植物群落灌木层伴生物种组成相对稳定；盐爪爪群落灌木层和草本层的盖度7月份最大；芦苇群落灌木层和草本层的盖度9月份达到最大。从5月到9月份盐爪爪群落和芦苇群落草本层伴生种组成随季节变化不大，盐爪爪群落草本层植物的种数、盖度和冠幅7月份最大；芦苇群落草本层植物的种数、盖度和冠幅逐渐增大，9月份植物种最多、盖度和冠幅最大，结构变得复杂。这主要是由于民勤盐渍荒漠草地气候特点、植物自身生理生态特性、分布的立地条件的差异所决定的。

关键词: 土壤肥力, 土壤肥力, 钙, 水稻, 产量

Abstract: The paper aims to grasp the seasonal variation characteristics of the Halophyte community in desert grassland of Minqin, provide a scientific basis for desert grassland protection, productivity recover and reasonable utilization. This article adopted line transects method and sample method to investigate Kalidium foliatum community and Phragmites communis community of saline desert grassland in Minqin. Through the survey data of May, July and September, the composition and seasonal characteristics of Kalidium foliatum community and Phragmites communis community were analyzed. The results showed that: the composition of halophyte community shrub layer associated species was relatively stable, the coverage of Kalidium foliatum community shrub layer and herb layer was the largest in July; the coverage of Phragmites communis community shrub layer and herb layer had reached the maximum in September. Herbaceous companion species composition of Kalidium foliatum community and Phragmites communis community changed a little with seasons from May to September, plant species, coverage and crown width of Kalidium foliatum community herb layer were the largest in July; plant species, coverage and crown width of Phragmites communis community herb layer gradually increased and reached the maximum in September, the structure had become complex. This was mainly due to climate characteristics of saline desert grassland in Minqin, physiological and ecological characteristics of the plant, and the distribution of site conditions determined by the discrepancy.