塔里木河中游胡杨高径系数及其对生境的指示意义

Abstract

PDF HTML阅读 XML下载 导出引用 引用提醒 塔里木河中游胡杨高径系数及其对生境的指示意义 DOI: 10.5846/stxb201608111645 作者: 作者单位: 新疆师范大学地理科学与旅游学院,新疆师范大学地理科学与旅游学院,新疆师范大学地理科学与旅游学院,苏州科技大学外国语学院;苏州科技大学外国语学院,新疆师范大学地理科学与旅游学院,新疆师范大学地理科学与旅游学院 作者简介: 通讯作者: 中图分类号: 基金项目: 国家自然科学基金项目（31460167，41661002） The height-diameter coefficient of Populus euphratica and its indicative significance to the habitat in the middle reaches of the Tarim River Author: Affiliation: College of Geography Science and Tourism，Xinjiang Normal University,,,,College of Geography Science and Tourism，Xinjiang Normal University, Fund Project: 摘要 | 图/表 | 访问统计 | 参考文献 | 相似文献 | 引证文献 | 资源附件 | 文章评论 摘要:构建合理、可行的定量评价胡杨生境的指标体系，能够为塔里木河流域的社会经济可持续发展、生态环境保护提供科学依据和决策参考。以野外获取的单株胡杨树高和胸径为基础数据，构建了高径系数模型，定量分析了胡杨高径系数与胸径、龄级关系及其对生境类型的响应，并对其成因进行了辨析。结果表明：①以低阶地（含河漫滩）生境类型为基准，采用指数模型可以较好的模拟胡杨高径系数随胸径的变化趋势，不同生境类型下模拟曲线的响应特征也各不相同，各生境类型的胡杨高径系数随胸径的增大而减小；②随着龄级的增大，高径系数逐渐减小；③在相同胸径条件下，中阶地、高阶地、沙地等生境类型的胡杨树高分别相当于低阶地（含河漫滩）生境条件下的70%、42%、22%左右；④胡杨高径系数越大，其生长环境越好；反之，则越差，胡杨高径系数可以作为胡杨生境类型的敏感指示。进一步丰富了森林生境评价指标体系和树高-胸径关系模型理论，对生态学和测树学理论体系的完善具有一定意义。 Abstract:Building a reasonable and feasible index system for Populus euphratica habitat evaluation in the Tarim River basin is important for social development, economic sustainable development, and ecological environmental protection and will provide a scientific basis for decision-making. Based on data for P. euphratica height and diameter at breast height (DBH), a model for a height-diameter coefficient was established. Quantitative analysis of the relationship between the height-diameter coefficient and DBH, age, response to habitat type, and analysis of the causes was conducted. The results showed that ① Based on the low-level landform (flood plain) habitat type, the index model simulated trends in the height-diameter coefficient of P. euphratica with changes in DBH. Response characteristics of simulated curves for different habitat types varied. The height-diameter coefficient of P. euphratica increased in different habitat types as the DBH decreased. ② With an increase in tree age, the height-diameter coefficient gradually decreased. ③ The height of P. euphratica under constant DBH conditions in the middle terrace, high terrace, and sand habitat types was equivalent to 70%, 42%, and 22%, respectively, of the height of P. euphratica in the floodplain-low terrace. ④ The growth environment of P. euphratica was better when the height-diameter coefficient was higher. Thus, the height-diameter coefficient of P. euphratica could be a sensitive indicator of P. euphratica habitat types. This study further enhanced the evaluation index system for forest habitat by using tree height and DBH model theory. It has implications to the merit of the ecology and forest mensuration theory system. 参考文献 相似文献 引证文献