论文部分内容阅读
在木麻黄低效林生长特性、结构特征和防护效能研究的基础上,全面分析木麻黄低效林的分布状况和主要特征,并对导致大面积木麻黄低效林的成因进行综合诊断。低效林是自然因素和社会经济条件作用下形成的,自然因素包括立地条件较差、林木自然衰老及灾害天气和病虫害对木麻黄林的破坏,社会经济因素主要有立地选择或造林树种选择不当、造林材料的遗传性不高、苗木质量低下、林分密度和土壤管理不善,以及人为干扰对林分的破坏等。针对木麻黄低效林的形成特点和原因,总结提出木麻黄低效林改造的主要途径。
Based on the study of growth characteristics, structural characteristics and protective efficacy of Casuarina equisetifolia inefficient forests, the distribution and main characteristics of Casuarina equisetifolia inefficient forests were comprehensively analyzed. The causes of large-scale Casuarina inefficient forests were comprehensively diagnosed. Low-efficiency forests are formed under natural and socio-economic conditions. Natural factors include poor site conditions, natural aging of forest trees, disasters caused by weather disasters and pests and diseases, and the main socio-economic factors are site selection or improper selection of tree species for afforestation , The heritability of afforestation material is not high, the quality of seedlings is low, the stand density and soil management are poor, and the destruction caused by man-made disturbance to the stand. In view of the formation characteristics and causes of Casuarina equisetifolia inefficient forest, this paper summarizes the main ways to transform Casuarina inefficient forest.