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中国农学通报 ›› 2021, Vol. 37 ›› Issue (10): 35-41.doi: 10.11924/j.issn.1000-6850.casb2020-0152

所属专题: 园艺

• 林学·园艺·园林 • 上一篇    下一篇

河西走廊不同生境黑果枸杞种群年龄结构及分布格局

李得禄(), 魏林源, 张芝萍, 李昌龙, 柳小平   

  1. 甘肃省荒漠化与风沙灾害防治国家重点实验室/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,兰州 730070
  • 收稿日期:2020-06-04 修回日期:2021-01-25 出版日期:2021-04-05 发布日期:2021-04-12
  • 作者简介:李得禄,男,1977年出生,甘肃民乐人,研究员,硕士,主要从事荒漠植物及荒漠化防治研究。通信地址:730070 甘肃省兰州市安宁区北滨河西路390号,E-mail: lidlu2008@163.com
  • 基金资助:
    国家自然科学基金项目“河西走廊黑果枸杞种群生殖配置对生境变化和人为干扰的响应及其调控机制”(31760121);国家自然科学基金项目“衰败梭梭林下土壤结皮发育对黄花补血草种子萌发和种群发育的影响研究”(31660124)

Age Structure and Distribution Pattern of Lycium ruthenicum Population of Different Habitats in Hexi Corridor

Li Delu(), Wei Linyuan, Zhang Zhiping, Li Changlong, Liu Xiaoping   

  1. State Key Laboratory Breeding Base of Desertification and Aeolian Sand Disaster Combating/ Gansu Desert Control Research Institute/ Minqin National Studies Station for Desert Steppe Ecosystem, Lanzhou 730070
  • Received:2020-06-04 Revised:2021-01-25 Online:2021-04-05 Published:2021-04-12

摘要:

通过河西走廊不同生境条件下黑果枸杞种群冠幅、高度、密度等指标的测定,分析黑果枸杞种群生长量差异性,探讨黑果枸杞种群分布格局。结果表明:(1)不同生境条件下黑果枸杞种群密度、高度、冠幅均存在一定的差异,盐渍化程度越严重,群落物种越单一,黑果枸杞种群密度越大。除民勤县马家井黑果枸杞种群外,其他各样地种群高度、冠幅差异不显著(P>0.05)。(2)固定半固定沙丘上黑果枸杞种群年龄结构为衰退型,其余均为稳定型,受干旱气候和盐渍化影响,黑果枸杞种群更新缓慢,幼苗数量十分有限,对种群稳定发展极为不利。(3)8种生境类型黑果枸杞群均表现为聚集分布。各生境中聚集强度有差异,判定聚集强度由强到弱为民勤马家井固定半固定沙丘>酒泉市瓜州县城南重度盐碱地>民勤县白土井湖积沉积物盐碱地>民勤县水盛村中度盐碱地>民勤县丰政村重度盐碱地>民勤县上李家村覆沙中度盐碱地>民勤县皇辉村轻度退耕盐碱地>民勤县兴和村覆沙丘间地。

关键词: 河西走廊, 生境, 黑果枸杞, 种群分布格局, 年龄结构

Abstract:

Based on the measurement of crown, height and density of Lycium ruthenicum population in different habitats in Hexi corridor, this paper analyzed the growth difference and the distribution pattern of L. ruthenicum population. The results show that: (1) the density, height and crown of L. ruthenicum population are different among the habitats, the more serious salinization degree, the more single the species, the density of L. ruthenicum population is greater; except the population of L. ruthenicum in Majiajing of Minqin County, there is no significant difference in height and crown among other groups (P>0.05); (2) the age structure of L. ruthenicum population on the semi-fixed sand dune is the declining type, and the rest is the stable type, affected by the arid climate and salinization, the regeneration of L. ruthenicum population is slow, and the number of seedlings is very limited, which is adverse to the stable development of the population; (3) all the 8 habitat types of L. ruthenicum show an aggregation distribution, the aggregation intensity varies with the habitats; the order of aggregation intensity is: semi-fixed sand dune in Majiajing, Minqin County> severe saline alkali land in the south of Guazhou County, Jiuquan City> saline alkali land in the lacustrine sediments of Baitujing, Minqin County> moderate saline alkali land in Shuisheng village of Minqin County >severe saline alkali land in Fengzheng village of Minqin County> sand covered moderate saline alkali land in Shanglijia village of Minqin County> light saline alkali land of reclamation in Huanghui village of Minqin County> the land covered with sand dunes in Xinghe village of Minqin County.

Key words: Hexi corridor, habitats, Lycium ruthenicum, population distribution pattern, age structure

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