CAJ | 학술논문

对湖南省天际岭国家森林植物园立地条件基本一致的3个林龄阶段樟树(10、24、45年)-马尾松(10、24、45年)混交林土壤有机碳、氮含量、贮量及土层分布进行研究。结果表明：不同林龄,同一林龄的不同土层土壤有机碳、氮含量和贮量均存在显著性差异( P<0．05)。樟树-马尾松不同林龄各土层有机碳含量的变化分别为10年生3．73~18．04 g/kg,24年生6．84~21．12 g/kg,45年生5．36~21．46 g/kg。土壤氮含量的变化范围分别为10年生1．08~1．56 g/kg,24年生0．94~1．47 g/kg,45年生1．34~2．12 g/kg。樟树-马尾松混交林3个林龄阶段林地有机碳和氮含量均随土层深度增加而逐渐下降。樟树-马尾松混交林3个林龄阶段森林土壤有机碳贮量差异性显著(P=0．001),氮贮量差异性不显著(P=0．157)。3个林龄阶段林地土壤有机碳含量与氮含量存在极显著相关性(P<0．01),除林龄为45年外,10年生和24年生混交林土壤有机碳含量与碳氮比相关性均不显著。10年时,樟树-马尾松混交林土壤氮与碳氮比之间呈现极显著相关( P<0．01),24年和45年时樟树-马尾松混交林土壤氮与碳氮比之间的相关性不显著。
대호남성천제령국가삼림식물완입지조건기본일치적3개림령계단장수(10、24、45년)-마미송(10、24、45년)혼교림토양유궤탄、담함량、저량급토층분포진행연구。결과표명：불동림령,동일림령적불동토층토양유궤탄、담함량화저량균존재현저성차이( P<0．05)。장수-마미송불동림령각토층유궤탄함량적변화분별위10년생3．73~18．04 g/kg,24년생6．84~21．12 g/kg,45년생5．36~21．46 g/kg。토양담함량적변화범위분별위10년생1．08~1．56 g/kg,24년생0．94~1．47 g/kg,45년생1．34~2．12 g/kg。장수-마미송혼교림3개림령계단임지유궤탄화담함량균수토층심도증가이축점하강。장수-마미송혼교림3개림령계단삼림토양유궤탄저량차이성현저(P=0．001),담저량차이성불현저(P=0．157)。3개림령계단임지토양유궤탄함량여담함량존재겁현저상관성(P<0．01),제림령위45년외,10년생화24년생혼교림토양유궤탄함량여탄담비상관성균불현저。10년시,장수-마미송혼교림토양담여탄담비지간정현겁현저상관( P<0．01),24년화45년시장수-마미송혼교림토양담여탄담비지간적상관성불현저。
Soil organic carbon ( SOC) and nitrogen ( N) concentration, storage and distribution of soil layers in mixed stand of Cinnamomum camphora and Pinus massoniana at three different stand ages at the basically same site condition in Tianjiling National Forest Park of Hunan province, China. The results showed that concentration and storage of SOC and N were significantly different in three stand ages and different soil layers at the same stand age ( P <0. 05 ) . SOC concentration ranged from 3. 73 g/kg to 18. 04 g/kg in 10-year-old stand, from 6. 84 g/kg to 21. 12g/kg in 24-year-old stand and from 5. 36 g/kg to 21. 46 g/kg in 45-year-old stand. Soil N concentration varied from 1. 08 g/kg to 1. 56 g/kg in 10-year-old stand, from 0. 94 g/kg to 1. 47 g/kg in 24-year-old stand, from 1. 34 g/kg to 2. 12 g/kg in 45-year-old stand. SOC and N concentrations decreased with soil depth increasing at three stand ages. At three stand ages, it had no significant difference in N storages (P=0. 157), but showed significant difference for SOC storage (P=0. 001). SOC concentrations was positively correlated with N concentration (P<0. 01 ) , and had no significant correlation with C/N at 10-year-old and 24-year-old stands. Soil N con-centration showed significantly correlation with C/N at 10-year-old stand ( P<0. 01 ) , but no significant correlation at the other two stand ages.