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以亚热带东部地区48年生樟(Cinnamomum camphora)人工林为研究对象,探讨不同林下植被处理方式对植被和土壤碳储量的影响。研究结果表明:1)林下植被抚育增加了植被的碳储量,增幅为48.87%,平均每年比未抚育林分增加了0.62t·hm–2;2)林下植被抚育降低了土壤有机碳含量,降低幅度介于4.79%–34.13%之间,其中0–10cm、10–20cm土层比未抚育林分分别降低了10.16g·kg–1和8.58g·kg–1,差异达到显著水平(p<0.05);3)林下植被抚育降低了森林土壤碳储量,降低幅度介于1.98%–43.45%之间,其中0–10cm和10–20cm土层分别降低了15.39t·hm–2和11.58t·hm–2,差异达到极显著水平(p<0.01)和显著水平(p<0.05);4)林下植被抚育降低了森林生态系统总碳储量,降低幅度为4.27%,但差异不显著。因此,林下植被抚育虽有利于植被碳储量的积累,但降低了土壤有机碳含量和储量。
Taking 48-year-old Cinnamomum camphora plantations in eastern subtropics as the research object, the effects of different subterranean vegetation treatments on vegetation and soil carbon storage were discussed. The results showed as follows: 1) Undergrowth of afforestation increased the carbon storage of vegetation by 48.87%, which increased by 0.62t · hm-2 per year on the average; 2) The subsoil vegetation reduced the content of soil organic carbon , And the decreasing ranged from 4.79% to 34.13%. Among them, 0-10cm and 10-20cm soil layers decreased by 10.16g · kg-1 and 8.58g · kg-1, respectively, p <0.05). 3) Forest subsoil vegetation reduced the soil carbon storage by 1.98% -43.45%, of which, the soil layers of 0-10cm and 10-20cm decreased by 15.39t · hm-2 and (P <0.01) and significant level (p <0.05); 4) Subtropical vegetation reduced the total carbon storage in forest ecosystem by 4.27%, but the difference was not significant Significant. Therefore, although the subsoil vegetation is conducive to the accumulation of vegetation carbon storage, but reduce the soil organic carbon content and reserves.