Wang Yan Fang, Liu Ling, Li Zhi Chao, Shi Xiao Feng, Yang Xiao Yan, ShangGuan Zhou Ping
College of Agriculture, Henan University of Science and Technology, Luoyang 471023, Henan, China.
State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Northwest Agriculture and Forestry University, Yangling 712100, Shaanxi, China.
Ying Yong Sheng Tai Xue Bao. 2018 Jan;29(1):25-32. doi: 10.13287/j.1001-9332.201801.009.
In the study, the method of space substituting time was used to investigate the distribution pattern of carbon and nitrogen storages in Quercus and Platycladus orientalis plantation ecosystems at different ages in hilly area of western Henan Province, China. We also analyzed the dynamic changes of soil carbon and nitrogen storages in different soil layers in the two plantation ecosystems. The results showed that the carbon storage in the arbor and litter layers increased with the increasing tree age. The storage of carbon and nitrogen in soil aggregated mainly in the surface layer and showed a trend of decrease-increase-decrease with the increasing tree age in all soil layers. The ranges of carbon and nitrogen storage in the surface soil were 20.31-50.07 and 1.68-2.12 t·hm in Quercus plantation, and 23.99-48.76 and 1.59-2.34 t·hm in P. orientalis plantation, respectively. Carbon storage ranges in Quercus and P. orientalis plantation ecosystems at different ages were 52.04-275.82 and 62.18-279.81 t·hm, respectively. The carbon sequestration capacity in P. orientalis plantation was a little higher than that in Quercus plantation. Soil C/N increased with the increase of afforestation age.
本研究采用空间代替时间的方法，对豫西山地不同龄期栎树和侧柏人工林生态系统碳氮储量的分布格局进行了研究。同时，分析了这两种人工林生态系统不同土层土壤碳氮储量的动态变化。结果表明，乔木层和凋落物层碳储量随树龄增加而增加。土壤碳氮储量主要集中在表层，各土层碳氮储量均随树龄增加呈先降后升再降的趋势。栎树人工林表层土壤碳储量范围为20.31 - 50.07 t·hm，氮储量范围为1.68 - 2.12 t·hm；侧柏人工林表层土壤碳储量范围为23.99 - 48.76 t·hm，氮储量范围为1.59 - 2.34 t·hm。不同龄期栎树和侧柏人工林生态系统碳储量范围分别为52.04 - 275.82 t·hm和62.18 - 279.81 t·hm。侧柏人工林的碳固存能力略高于栎树人工林。土壤C/N随造林年限增加而增大。
