【作者】 王秀琴；

【导师】 孙志虎；

【作者基本信息】 东北林业大学 ， 生态学， 2015， 硕士

【摘要】 本文以三江平原地区长白落叶松和樟子松人工林为研究对象,分别对不同林龄和密度落叶松、樟子松人工林和不同抚育间伐落叶松、樟子松人工林碳储量及分配格局进行分析研究,主要结论如下：1)林龄和密度对落叶松和樟子松人工林生态系统碳储量有显著影响。随林龄增加,落叶松和樟子松人工林生态系统碳储量虽均表现出显著增加趋势(P<0.05),随密度增加,落叶松和樟子松人工林生态系统碳储量虽均表现出降低趋势(P<0.05)。2)根据林龄和密度分别建立落叶松和樟子松人工林活立木层、灌木层、草本层和土壤层碳储量估测模型,准确率在95%以上。3)林龄和密度对落叶松和樟子松林生态系统碳分配有显著影响,各组分碳比例随林龄和密度变化而变化。4)抚育间伐增加落叶松和樟子松人工成熟林生态系统和林分累积碳储量,落叶松林生态系统碳储量显著高于樟子松林。5)抚育间伐改变了落叶松和樟子松人工林生态系统各组分碳比例,但对各组分碳比例排列顺序没有影响。6)抚育间伐显著提高落叶松和樟子松人工林活立木定期年均固碳量,中幼龄林活立木定期年均固碳量最大。不同抚育间伐处理下落叶松人工林活立木碳储量增长率高于樟子松人工林。7)抚育间伐显著降低落叶松和樟子松林各龄组累积枯死木碳储量,30 a以后枯死木碳储量达到最大,是管理关键期。更多还原

【Abstract】 Carbon storage and its spatial distribution were studied in Larix olgensis and Mongolian pine plantation at different ages and densities and thinning, in hilly area of Sanjing plain. The main results showed that:1) Forest age and density significantly impact on total ecosystem carbon in Larch and Mongolian pine plantation. Total ecosystem carbon significant increased with age increased (P<0.05), and significant decreased with density increased in Larch and Mongolian pine plantation (P<0.05).2) Live tree carbon model, shrub carbon model, herb carbon model and soil carbon model based on forest age and density in Larch and Mongolian pine plantation, their accuracy is above 95%.3) Forest age and density significantly impact on ecosystem carbon allocation in Larch and Mongolian pine plantation. Every component percentage of ecosystem carbon is changed with forest age and density.4) Thinning increased total ecosystem carbon and cumulative total carbon in Larch and Mongolian pine plantation. Total ecosystem carbon is higher in Larch plantation than Mongolian pine plantation.5) Thinning altered every component percentage of ecosystem carbon. But thinning didn’t impact the order of every component percentage of ecosystem carbon.6) Thinning significant increased live tree average annual carbon sequestration in Larch and Mongolian pine. Live tree average annual carbon sequestration is biggest in the young forest. Live tree carbon growth rate is higher in Larch plantation than in Mongolian pine plantation.7) Thinning significantly decreased cumulative dead tree carbon in Larch and Mongolian pine plantation. Dead tree carbon is the biggest after 30 a. This stage is the key period of management.更多还原