柠条(Caragana korshinskii)是荒漠半荒漠地区防风固沙的主要树种,而柠条豆象(Kytorhinus immixtus)、豆荚螟(Etiella zinckenella)和柠条种子小蜂(Bruchophagu neoaraga-nae)是危害其种实的主要害虫。本文选择宁夏荒漠草原景观人工固沙次生林地、流动风积沙地和沙壤土质丘陵地3种生境类型的柠条林,对不同斑块面积下的柠条种实害虫进行了调查,分析了其空间生态位及其与斑块面积之间的关系。结果表明:在沙壤土质丘陵生境中,种实害虫垂直分布比例依次为林冠层(38.9%)>中层(33.9%)>下层(27.2%),水平分布比例依次为西侧(31.0%)>北侧(29.3%)>南侧(21.7%)>东侧(18.1%),其中柠条豆象、柠条种子小蜂主要分布在林冠层,豆荚螟主要分布在中层;在绝大多数情况下3种种实害虫是以单一种占蛀一豆荚;柠条豆象的垂直生态位宽度值(0.773)和水平生态位宽度值(0.690)最小,其次为柠条种子小蜂(分别为0.959和0.829),豆荚螟的生态位宽度值最大(分别为0.977和0.917);在不同生境中,3种种实害虫生态位宽度差异不显著(P>0.05),斑块面积与生态位宽度无显著的相关性。 Caragana korshinskii is the main tree species for windbreak and sand fixation in desert semi-desert area. However, the genus Kytorhinus immixtus, Etiella zinckenella and Bruchophagu neoaraga-nae, The main pests. In this paper, three kinds of habitat types of Caragana korshinskii forests were selected in Ningxia desert grassland landscape artificial sand-fixation secondary forest, mobile aeolian sandy land and sandy loamy soil hilly land. The pests of Caragana korshinskii under different plaque area were investigated. Niche and its relation to plaque area. The results showed that the vertical distribution of pests in sandy loamy hilly habitat was from the canopy layer (38.9%) to the middle layer (33.9%) to the lower layer (27.2%), with the horizontal distributions ranging from 31.0% on the west (29.3%)> the south (21.7%)> the east (18.1%). The larvae of Caragana korshinskii and Caragana korshinskii were mainly distributed in the canopy and the larvae of the larvae were mainly found in the middle layer. In most of the cases The three species of pests were monoculture pods. The vertical niche breadth (0.773) and horizontal niche breadth (0.690) were the lowest among the three pests, followed by Carassius auratus (0.959 and 0.829 ), And the value of Niche breadth was the largest (0.977 and 0.917 respectively). There was no significant difference in niche breadth among the three species of pests (P> 0.05), but no significant correlation between plaque area and niche breadth Sex.