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人工榆树林对温带草原植物多样性的影响

杨洪晓1;王学全2,3;杨文斌2,3,4;卢琦2,3   

  1. 1青岛农业大学水产学院, 山东青岛 266109;2中国林业科学研究院林业研究所/国家林业局林木培育重点实验室, 北京 100091;3中国林业科学研究院防治荒漠化研究与发展中心, 北京 100091;4内蒙古自治区林业科学研究院, 呼和浩特 010010
  • 收稿日期:2007-10-07 修回日期:1900-01-01 出版日期:2008-06-20 发布日期:2008-06-20

Effects of artificial Ulmus pumila forest on plant diversity of temperate grassland in Inner Mongolia.

YANG Hong-xiao1;WANG Xue-quan2,3;YANG Wen-bin2,3,4;LU Qi2,3   

  1. 1College of Aquatic Products, Qingdao Agricultural University, Qingdao
    266109, Shandong, China;2Research Institute of Forestry/State Forestry Ad
    ministration Key Laboratory for Forest Tree Breeding, Chinese Academy of Forestry, Beijing 100091, China;3Research and Development Center for Combating Desertification, Chinese Academy of Forestry, Beijing 100091, China; 4Inner Mongolia Academy of Forestry Science, Huhhot 010010, Inner Mongolia, China
  • Received:2007-10-07 Revised:1900-01-01 Online:2008-06-20 Published:2008-06-20

摘要: 在样线和样方调查的基础上,研究了内蒙古四子王旗人工榆树林对温带草原物种多样性的影响.结果表明:榆树林对草原的物种多样性有明显影响.随榆树林树木密度的提高,林下草本植物的丰富度、均匀度和多样性等指数均呈降低趋势.靠近榆树林的草原群落的物种丰富度、均匀度和多样性等指数高于远离榆树林的草原群落.喜生于树林内部的草本植物有旱麦瓶,喜生于榆树林周边草原的草本植物有阿尔泰狗娃花、扁蓄豆、二裂委陵菜、赖草和糙隐子草等.可见,盲目排斥草原地区造林并非科学之举,应选择土壤水分相对丰富的地段营造适当规模的人工林,以促进草原地区的植物多样性保护.

关键词: 邻苯二甲酸酯, 增塑剂, 农业土壤, 污染

Abstract: Based on field survey, the effects of artificial Ulmus pumila forest on the species diversity of temperate grassland in Siziwang Banner of Inner Mongolia were studied. The results showed that U. pumila forest had obvious effects on the species diversity of grassland. With increasing density of U. pumila, the Patrick’s richness, Pielou’s evenness and Shannon-Wiener index of grass species under the forest had a decreasing trend, and were higher nearby the forest than far from the forest. The habitat inside the forest was favorable to Silene jenisseensis, while that nearby the forest was favorable to Heteropappus altaicus, Pocockia ruthenia, Potentilla bifurca, Leymus secalinus and Cleistogenes squarrosa, suggesting that to blindly exclude forestation on grassland could be less scientific, while properly afforesting U. pumila on the sides with relatively abundant soil moisture should be available to the conservation of plant diversity in temperate grassland regions.

Key words: phthalic acid esters (PAEs), plasticizer, farmland soil, pollution.