宁夏哈巴湖国家级自然保护区合作杨与榆树的群落学特征研究  

Study on community features of Populus×xiaozuanica and Ulmus pumila in the Ningxia Habahu National Nature Reserve

作　　者：张维军 王金龙 何兴东[3] ZHANG Wei-jun;WANG Jin-long;HE Xing-dong(The Ningxia Habahu National Nature Reserve Administration,Yanchi 751501,Ningxia Hui Autonomous Region,China;College of Agronomy and Resource Environment,Tianjin Agricultural University,Tianjin 300384,China;College of Life Sciences,Nankai University,Tianjin 300071,China)

机构地区：[1]宁夏哈巴湖国家级自然保护区管理局,宁夏盐池751501 [2]天津农学院农学与资源环境学院,天津300384 [3]南开大学生命科学学院,天津300071

出　　处：《天津农学院学报》2019年第3期26-30,共5页Journal of Tianjin Agricultural University

基　　金：中央财政森林生态效益补偿基金项目（HBH20171107）

摘　　要：本研究中调查了年降水量 300 mm 宁夏哈巴湖国家级自然保护区 2 个 37 龄榆树群落和 3 个 35 龄合作杨群落,分析了它们目前的生长状况和群落学特征。结果表明:草化生境的合作杨 平均株高 6.23 m,平均胸围 15.68 cm,林冠下没有天然繁殖的幼苗,植株处于衰老状态;地表覆沙 生境的合作杨平均株高 0.85~1.71 m,平均冠幅 0.50~0.74 m,林冠下株高<0.6 m 天然繁殖合作杨 幼苗占 43.04%~47.77%, 植株处于旺盛状态。 榆树平均株高 5.42~5.73 m, 平均胸围 20.08~61.20 cm, 林冠下没有天然繁殖的幼苗,植株处于衰老状态。合作杨的生态位宽度为 1.06~1.87,榆树生态位 宽度为 1.12~1.17。总体上,该保护区榆树及大多数合作杨不能天然繁殖,但它们对于改善生产生 活条件、维系生态安全起了重要作用。We investigated three communities of 35 year-old Populus×xiaozuanica and two communities of 37 year-old Ulmus pumila in Ningxia Habahu National Nature Reserve, where the annual rainfall was 300 mm. The results showed that, in the habitats of growing grass, the average plant height of P.×xiaozuanica was 6.23 m, its average circumference was 15.68 cm, there was no seedlings under the canopy, and the plants belonged to senility status, while in the habitats of earth surface covered by sands, the average plant height of P.×xiaozuanica was 0.85-1.71 m, its average canopy diameter was 0.50-0.74 m, the seedlings that plant height was less than 0.6 m occupied 43.04%-47.77% under the canopy, and the plants existed vigorous status. The average plant height of U.×pumila was 5.42-5.73 m, its average circumference was 20.08-61.20 cm, there was no seedlings under the canopy, and the plants belonged to senility status. The niche width of P.×xiaozuanica and U.×pumila was 1.06-1.87 and 1.12-1.17, respectively. Wholly, here U.×pumila could not naturally breed, majority of P.×xiaozuanica could not naturally breed, but they had played an important role in improving living conditions and maintaining ecological security.

关 键 词：半干旱区 乔木林 合作杨 榆树 宁夏哈巴湖国家级自然保护区 

分 类 号：Q948.1[生物学—植物学]