【摘要】 为给黄羊滩及类似地区流动沙地人工造林提供科学依据,在黄羊滩流动沙地营造不同树种的人工林,探讨不同人工林地天然植被恢复效果和防止风蚀的差异。造林7年后调查资料表明:从物种丰富度衡量,小叶锦鸡儿和侧柏人工林加快了天然植被的恢复进程,新疆杨和欧美杨107人工林延缓了天然植被的恢复进程,沙枣和榆树人工林对天然植被恢复的影响不大;欧美杨107和新疆杨人工林1年生草本占绝对优势,随林地环境条件的改善,1年生草本逐渐减少,多年生草本、灌木逐渐增加,侧柏和小叶锦鸡儿人工林地天然植物种生活型结构已趋于多样化。新疆杨和欧美杨107人工林地处于流动沙地阶段,沙枣和榆树人工林地处于半固定沙地阶段,侧柏和小叶锦鸡儿人工林地处于固定沙地阶段。相同沙漠化阶段林地间天然植被的相似性系数较大,不同沙漠化阶段林地间相似性系数较小。该地区人工造林树种以小叶锦鸡儿和侧柏最佳,沙枣和榆树次之,不宜选择新疆杨和欧美杨107等杨树品种。更多还原

【Abstract】 Plantation of different species was made in Hangyangtan Sandland.Effects of natural vegetation restoration and difference of wind erosion in stands were studied in 7 years after plantation to provide scientific basis for Hangyangtan Sandland and other similar areas.Natural vegetation restoration process was speed up in Caragana microphylla and Platycladus orientalis stands based on species richness,the opposite effect in the Populus alba var.Pyramidalis and Populus euramercana 107 stands,and little effect in Elaeagnus angustifolia and Ulmus pumila stands.The undergrowth was dominated by annual herbs in the P.alba var.pyramidalis and P.euramericana 107.A slight increase of the shrubs and perennial herbs were found in the E.angustifolia and U.pumilaforests.And the life-form spectra tended to diversification in the C.microphylla and P.orientalis stands.Observation data showed that wind erosion was most serious in the P.alba var.pyramidalis and P.euramericana 107 stands,and that in the E.angustifolia and U.pumila forest was the second.Natural vegetation similarity coefficient in the same desertification stage is higher than the value in different stages of those stands.So C.microphylla and P.orientalis are the best choice as afforestation species,E.angustifolia and U.pumilaforests are the second,and P.alba var.pyramidalis and P.euramericana 107 should not be chosen.更多还原