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中国农学通报

中国农学通报 ›› 2015, Vol. 31 ›› Issue (1): 53-57.doi: 10.11924/j.issn.1000-6850.2014-1079

• 林学 园艺 园林 • 上一篇    下一篇

石羊河中下游沙蒿种群年龄结构与动态分析

卢小妹1,唐进年1,2,陈 英1,纪永福2,安富博2,张莹花2   

  1. (1甘肃农业大学资源与环境学院,兰州 730070；2甘肃省治沙研究所/荒漠化与风沙灾害防止省部共建国家重点实验室,兰州 730070）
  • 收稿日期:2014-04-15 修回日期:2014-12-23 接受日期:2014-07-17 出版日期:2015-03-18 发布日期:2015-03-18
  • 通讯作者: 卢小妹
  • 基金资助:
    国家自然科学基金“民勤绿洲边缘固沙林生态用水机制及其应用研究”(41161005)；甘肃创新团队建设计划“沙生植物保护利用科技创新团队”(1207TTCA002)；国家科技支撑计划(2012BAD16B0203)民勤绿洲边缘退化防护体系修复技术集成与示范；国家科技支撑计划（2012BAD16B0203）民勤绿洲边缘退化防护体系修复技术集成与示范。

Population Age Structure and Dynamic Analysis of Artemisia arenaria in
Middle and Lower Reaches of Shiyang River Area

Lu Xiaomei,1 Tang Jinnian1,2, Chen Ying1, Ji Yongfu2, An Fubo2, Zhang Yinghua2   

  1. (1Gansu Agricultural University, Lanzhou 730070; 2Province-Ministry National Key Laboratory Breeding Base of Gansu Province/Gansu Province Institute of Desertification Control, Lanzhou 730070)
  • Received:2014-04-15 Revised:2014-12-23 Accepted:2014-07-17 Online:2015-03-18 Published:2015-03-18

摘要：

对石羊河流域中下游沙蒿(Artemisia arenaria)种群进行了调查，利用体积结构理论划分沙蒿种群冠级结构，绘制静态生命表及存活曲线，分析沙蒿种群年龄结构与动态，主要结果如下：（1）沙蒿种群幼龄级个体数目多，中龄级的个体数稳定，而高龄级个体由于种间竞争及环境因子的影响，个体数少； （2）沙蒿种群的存活曲线趋于Deevey-Ⅱ型，动态表现为前期增长，中期稳定，后期衰退；（3）沙蒿种群的生存率函数单调下降, 累积死亡率函数单调上升，死亡密度函数曲线表现的较为平缓，而危险率函数表现出随着龄级的增加而逐渐增大的趋势。

关键词: NAM, NAM

Abstract: This research investigated the Artemisia arenaria population in the middle and lower reaches of Shiyang River basin. By using the volume structure theory, we classified the age structure of Artemisia arenaria population, mapped the survival curve and static life table, and analyzed the age structure and dynamic condition of Artemisia arenaria population. The main results are as follows: (1) the individual number of young Artemisia arenaria population is large, of middle-age class is stable, whereas of senior-age is less due to the effects of interspecific competition and environmental factors; (2) the survival curve of Artemisia arenaria population exhibits a tendency of Deevey-Ⅱ type; with regard to the dynamic performance, it shows an early-stage growth, medium -term stable condition and late-stage recession; (3) the function of survival rate of Artemisia arenaria population decreases monotonically, whereas the function of cumulative mortality increases monotonically. The curve of morality density is relatively flat，and the function of hazard rate demonstrates a progressively increasing trend with the increasing age class.