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为探讨天然梭梭(Haloxylon ammodendron(C.A.Meyer)Bunge)林空间分布及其与林地地貌起伏变化(GPS点海拔)的关系,本研究以巴丹吉林沙漠东缘的塔木素野生肉苁蓉及梭梭产籽基地为试验区,以区域内梭梭林为研究对象,采用样线法调查梭梭株高和冠幅直径,结合GPS点统计梭梭密度,运用不同分析方法探讨其相互关系。结果表明,梭梭数量特征与林地地貌起伏变化存在极显著的相关性(P<0.01),在自相关尺度范围内,梭梭数量特征与林地地貌起伏变化均主要受结构性因素影响,空间自相关程度较高,空间分布格局比较简单。梭梭密度、高度、冠幅直径及林地地貌起伏变化复杂程度依次降低。梭梭入侵沙丘由其南端开始,当梭梭入侵以后,受试验地常年合成风向影响迅速扩散,使得沙丘向前推移的速度减慢,起到了防风固沙的作用。这一研究结果为产籽基地建设提供了科学依据。
In order to investigate the spatial distribution of natural forest Haloxylon ammodendron (CAMeyer) Bunge and its relationship with the change of forest landform (GPS point elevation) The seed-producing base was the experimental area. Taking Haloxylon ammodendron forest as the research object, the height and crown diameter of Haloxylon ammodendron were investigated by the sample-line method. The density of Haloxylon ammodendron was measured by GPS spot and the relationship was analyzed by different methods. The results showed that there was a significant correlation between the quantitative characteristics of Haloxylon ammodendron and the fluctuation of forest landform (P <0.01). Within the range of autocorrelation, the quantitative characteristics of Haloxylon ammodendron and the fluctuation of forest landform were mainly affected by the structural factors. A higher degree of correlation, spatial distribution pattern is relatively simple. The density, height, crown diameter and woodland topography of Haloxylon ammodendron decreased in turn. When Haloxylon intruded into the sand dunes, the southern part of Haloxylon ammodendron started to attack. After the invasion of Haloxylon ammodendron, the diffuse influence of perennial synthetic wind direction was rapidly diffused, which made the sand dunes move forward slowly and played the role of windbreak and sand fixation. The results of this study provide a scientific basis for the construction of seed-producing bases.