摘要
【目的】分析科尔沁沙地东部31个人工林林分的生态稳定性状况,总结相应改善措施,为科尔沁沙地生态恢复提供一定理论和技术支撑。【方法】以科尔沁沙地东部地区31个人工固沙林林分为研究对象,以生物学稳定性、抵抗稳定性、功能稳定性为准则层,以沙地人工固沙林生态稳定性为目标层,建立科尔沁沙地东部人工固沙林生态稳定性评价指标体系。采用传导机制建立结构方程模型后,确定人工固沙林生态稳定性指标权重。基于K-means聚类分析和等距划分法,确定人工固沙林生态稳定性等级划分标准。【结果】生物学稳定性、抵抗稳定性、功能稳定性所占权重分别为0.386、0.275、0.339。科尔沁沙地东部人工固沙林生态稳定性划分为高、中、低3个等级。林分综合得分值在3.261~4.10范围内等级为高,在2.421~3.261范围内等级为中,在1.581~2.421范围内等级为低。31个人工固沙林林分中13个林分生态稳定性处于高度稳定水平状态,13个林分处于中度稳定水平状态,5个林分处于低度稳定水平状态。【结论】樟子松×小叶杨×小叶锦鸡儿林等林分生态稳定性高,生态修复效果好。在适地适树的原则下,推荐该类树种搭配模式广泛应用。
【Objective】 The objective of the study was to analyze the ecological stability of various forest stand types in the eastern part of the Horqin Sandy Land,summarize the corresponding improvement measures,and provide certain theoretical and technical support for the ecological restoration of the Horqin Sandy Land.【Method】 The ecological stability evaluation index system of artificial sand fixation forests in the eastern part of Horqin Sandy Land was established by taking the biological stability,resistance stability and functional stability as the criterion layer,and the ecological stability of the artificial sand-fixing forest in the sandy land as the target layer.After the structural equation model was established by the conduction mechanism,the index weights of the artificial sand fixation ecological stability forest were determined.Based on K-means clustering analysis and equidistant division,the classification criteria for ecological stability of artificial sand fixation forests were determined.【Result】The weight of biological stability was 0.386,the weight of resistance stability was 0.275,and the weight of functional stability was 0.339.The ecological stability level of artificial sand fixation forest in the eastern part of Horqin Sandy Land was divided into three grades:High,medium and low.The combined score value of the forest stand was low in the range of 1.581 to 2.421,medium in the range of 2.421 to 3.261,and high in the range of 3.261 to 4.10.Among the 31 artificial sand fixation forest stands involved,13 stand ecological stability was in a high state of level,13 stands were in a moderate state and 5 stands were in a low level state.【Conclusion】Some forest stands including Pinus sylvestris var.mongholica Litv.×Populus simonii Carr.×Caragana microphylla Lam have high ecological stability and good ecological restoration effect.Under the principle of suitable trees in the right place,it is recommended that this type of tree species matching mode be widely used.
作者
文明
岳永杰
郭景怡
钟淇涵
赵恺
崔莹
WEN Ming;YUE Yong-jie;GUO Jing-yi;ZHONG Qi-han;ZHAO Kai;CUI Ying(College of Forestry,Inner Mongolia Agricultural University,Hohhot 010019,China)
出处
《西南农业学报》
CSCD
北大核心
2023年第8期1758-1769,共12页
Southwest China Journal of Agricultural Sciences
基金
内蒙古自治区重大专项专题(2019ZD00704)。
关键词
沙地人工固沙林
生态稳定性
结构方程模型
科尔沁沙地
Sandy artificial sand fixation forest
Ecological stability
Structural equation model
The Horqin Sandy Land
