【目的】毛竹在森林应对气候变化中发挥重要的作用,研究竹林不同经营措施的影响,进而了解植被生物量碳库及影响土壤碳库的状况。【方法】利用两因素随机区组设计,排除地形因子等影响,选取施肥和采伐留养方式2个因素,研究不同经营措施对毛竹林各土层2010—2013年土壤有机碳含量和贮量变化影响。【结果】1)不同经营措施0~10 cm层土壤有机碳含量变化最大,介于-0.52%(±0.62%)~0.75%±(0.44%)之间,其中A2 B3(中等施肥弱度采伐)与 A1B1(大量施肥强度采伐)土壤有机碳含量变化量差异极显著(P <0.01);2)中等施肥0~50 cm土壤有机碳贮量增量分别是大量施肥和不施肥的3.61倍和5.05倍,大量施肥和中等施肥0~10 cm 层土壤有机碳贮量变化差异显著(P<0.05);3)弱度采伐0~50 cm 土壤有机碳贮量增量分别是强度采伐和中度采伐的5.51倍和1.63倍,强度采伐和弱度采伐0~10 cm层土壤有机碳贮量变化差异显著( P <0.05);4)不同经营措施0~50 cm土壤有机碳贮量变化介于-15.56(±10.21)~53.15(±37.81)tC·hm -2之间,其中 A2B3(中等施肥弱度采伐)与 A1B1(大量施肥强度采伐)土壤有机碳贮量变化差异极显著(P <0.01);5)结合效应图得出结论,A2B3(中等施肥弱度采伐)的经营方案对0~50 cm土壤有机碳含量和贮量的积累效果最佳,而 A1 B1(大量施肥强度采伐)的经营方案最不利于0~50 cm土壤有机碳含量和贮量的积累。【结论】大量施肥强度采伐方式虽然可以保证竹材的大量输出,却会破坏原有的竹林生态结构,同时对土壤碳含量和贮量的影响尤为不利,从毛竹林生态系统碳汇积累角度考虑,并不是最可取的竹林经营方式。同时经营过程中,不同经营措施不仅会对土壤碳库产生影响,更会显著改变植被碳库状况,并伴随着?
[Objective]Moso bamboo is a very important forest resource in Zhejiang province and China. It has excellent carbon sequestration potential and can play an important role in coping with climate change. The international society have gradually recognized REDD + forest carbon sequestration mechanism and greatly expanded the development space of forest carbon sinks and also brought opportunities and challenges for China’s bamboo management in recent years. In this study,vegetation biomass carbon pool was changed to affect soil carbon pool through bamboo forest management. The two-factor randomized block design was used to eliminate the influence of topographical factors and two management measures ( fertilization and cutting ) were applied to investigate the changes in soil organic carbon ( SOM )concentration and carbon ? storage in bamboo forest ecosystems during the period from 2010 to 2013. The results showed that under different treatments,the greatest changes in SOM concentration ranged between -0. 52 ( ± 0. 62 )% and 0. 75 ( ± 0. 44)% in 0 -10 cm soil layer. Significant differences (P〈0. 01) in SOM concentration changes were found in treatments of A2 B3 ( intermediate fertilization level with low-intensity cutting measure) and A1 B1 ( high fertilization level with high-intensity cutting measure ) . Total SOM storage of the intermediate fertilization level increased as much 3 . 61 times and 5. 05 times greater than those of the high fertilization level and no fertilization treatments,respectively. There was significant ( P〈0 . 05 ) difference in SOM storage changes at 0 -10 cm soil layer between high fertilization level and intermediate fertilization level. Total SOM storage of the low-intensity cutting treatment increased as much 5. 51 times and 1. 63 times greater than those of the high intensity cutting measure and medium intensity cutting measure,respectively. There was significant ( P〈0 . 05 ) difference in SOM storage changes in 0 -10 cm soil layer between