CAJ | 학술논문

侵蚀退化红壤植被恢复后生态系统碳库变化的研究对全面认识生态恢复的作用以及碳汇经营具有重要意义.试验地位于福建省长汀县河田镇,本文以采用种植百喜草治理侵蚀退化地上典型“小老头”马尾松林(百喜草治理地)为对象,以相邻的未治理地为对照,研究生态系统及其各个分室碳库的变化.结果表明:侵蚀地种植百喜草治理后生态系统?乔木层及土壤层碳库均显著(P <0.05)或极显著(P <0.01)高于对照地,分别是对照的2.32倍?5.23倍和1.81倍.乔木层各器官碳贮量均显著高于对照地(P <0.05),其中树干碳贮量增量最大.与对照地土壤相比,表层0~20 cm 土壤碳贮量增量高达5.84 t? hm-2,同时土壤深层(20~100 cm)碳库增量(6.04 t? hm-2)与其相当.对照地的土壤碳库占生态系统碳库的比例为70畅88%,而百喜草治理地的土壤碳库所占比例下降至55.28%,表明侵蚀地种植百喜草治理后生态系统碳库分配趋于合理.因此,从森林碳汇与可持续经营角度出发,种植百喜草治理侵蚀退化红壤是一项可行有效的措施.
침식퇴화홍양식피회복후생태계통탄고변화적연구대전면인식생태회복적작용이급탄회경영구유중요의의.시험지위우복건성장정현하전진,본문이채용충식백희초치리침식퇴화지상전형“소로두”마미송림(백희초치리지)위대상,이상린적미치리지위대조,연구생태계통급기각개분실탄고적변화.결과표명:침식지충식백희초치리후생태계통?교목층급토양층탄고균현저(P <0.05)혹겁현저(P <0.01)고우대조지,분별시대조적2.32배?5.23배화1.81배.교목층각기관탄저량균현저고우대조지(P <0.05),기중수간탄저량증량최대.여대조지토양상비,표층0~20 cm 토양탄저량증량고체5.84 t? hm-2,동시토양심층(20~100 cm)탄고증량(6.04 t? hm-2)여기상당.대조지적토양탄고점생태계통탄고적비례위70창88%,이백희초치리지적토양탄고소점비례하강지55.28%,표명침식지충식백희초치리후생태계통탄고분배추우합리.인차,종삼림탄회여가지속경영각도출발,충식백희초치리침식퇴화홍양시일항가행유효적조시.
@@@@Studying carbon storage changes in degraded red soil after vegetation restoration has impor -tant significance to understand the effects of ecological restoration and carbon management .This paper investigated changes of carbon storage and allocation from eroded land conversion to Pasplum notatum Flügge grassland by ecological restoration with the unmanaged land as the control in the Hetian town of Changting County, Fujian province.The results shows that, by planting Pasplum notatum Flügge, carbon storage of the ecological system , the tree stratum and the soil layer all significantly improved , which were respectively 2.32 times, 5.23 times and 1.18 times as much as that in the control plot. The carbon storage of each organ in the tree stratum was significantly more than that of the control (P <0.05),and the increment of the carbon storage of the trunk was biggest .Compared with the con-trol, the increment of the carbon storage of the 0 ~20 cm soil layer was 5.84 t? hm-2 , similar to that of the 20 ~100 cm soil layer (6.04 t? hm-2 ).The percent of the soil layer carbon storage decreased from 70.88% to 55.28%, showing an improved state of carbon storage distribution in the ecological system by planting Pasplum notatum Flügge.From the aspects of forest carbon sequestration and sus -tainable management, planting Pasplum notatum Flügge to the degraded red soil is a feasible and ef -fective measure.