摘要
选取代表性的10、15、20和25年生桤（Alnus cremastogyne）-柏（Cupressus funebris）混交林及由桤-柏混交林演替而来的30年生纯柏林为研究对象,探讨了川中丘陵区人工桤-柏混交林生态系统碳储量的变化动态及其分配规律.结果表明：桤-柏混交林的植被碳储量在10～30年间持续增加,30年时达到52.40t·hm^-2,5个林龄中乔木层碳储量所占比例均在85.59%以上;桤-柏混交林的土壤碳储量（0～40cm）在10～15年间显著增加（P〈0.05）,15年时达最大值84.79t·hm^-2,15～25年间显著下降（P〈0.05）,25～30年间趋于稳定（P〉0.05）;桤-柏混交林生态系统碳储量在15年时达最大值118.13t·hm^-2,15～25年间缓慢下降,25～30年间有所增加;植被碳储量所占比例在10～30年间持续增加,土壤碳储量则相反.与我国其他类型人工林相比,桤-柏混交林的碳储量偏低.
The 10-,15-,20-and 25-year-old mixed alder（Alnus cremastogyne）-cypress（Cupressus funebris）plantations and the 30-year-old pure cypress plantation succeeded from mixed alder-cypress plantation in the hilly area of central Sichuan Basin were chosen as test objects to study the dynamic changes and allocation patterns of their carbon storage.The results showed that the vegetation carbon storage in mixed alder-cypress plantations increased continually from the age stage of 10-to 30-year,and reached 52.40 t·hm^-2 at the age stage of 30-year.The vegetation carbon storage of arbor layer at each age stage was more than 85.59% of the total,and the soil carbon storage within 0-40 cm layer increased significantly（P〈0.05）from the age stage of 10-to 15-year,with the maximum（84.79 t·hm^-2）at the age stage of 15-year,but decreased significantly（P〈0.05）from the age stage of 15-to 25-year and tended to stable from the age stage of 25-to 30-year（P〉0.05）.The carbon storage of the mixed alder-cypress plantations increased significantly from the age stage of 10-to 15-year,with the maximum（118.13 t·hm^-2）at the age stage of 15-year,but declined from the age stage of 15-to 25-year while increased slightly from the age stage of 25-to 30-year.The proportion of vegetation carbon storage increased continually from the age stage of 10- to 30-year,whereas that of soil carbon storage was in adverse.Comparing with other types of plantations in China,mixed alder-cypress plantation had a lower storage of carbon.
出处
《应用生态学报》
CAS
CSCD
北大核心
2008年第7期1419-1424,共6页
Chinese Journal of Applied Ecology
基金
国家重点基础研究发展规划项目(2005CB121108)
中国科学院西部行动计划资助项目(KZCX2-XB2-07-02)
关键词
碳储量
林龄
桤-柏混交林
川中丘陵区
carbon storage
forest age
mixed alder-cypress plantation
hilly area of central Sichuan Basin
