CAJ | 학술논문

基于野外实地调查，研究我国海南清澜港红树林湿地离文昌河河口和海洋的距离对红树林土壤有机碳分布的影响及土壤有机碳与 pH的关系。结果表明：在取样区域内，清澜港红树林土壤有机碳含量高、分布深；近河口各样地土壤 pH为4.9～6.2，远河口各样地土壤 pH为7.9～8.5；近河口红树林土壤厚度在85 cm 以上，取样区内土壤有机碳含量为(9.1±1.08)～(66.2 ± 5.17) g·kg －1，且随土壤深度增加先升高后降低，在60～70 cm 处有机碳含量达到最高；在水平方向上，近河口红树林土壤有机碳平均含量( 0～80 cm )随离海洋距离的增加而降低，近海、中间、近陆区域的土壤有机碳平均含量依次为(36.76±3.04)，(35.12±3.78)和(17.20±1.56) g·kg －1；近河口红树林近海和近陆区域的土壤有机碳平均含量差异显著(P＜0.05)；近河口红树林土壤有机碳含量的分布特征与密克罗尼西亚的雅浦和帕劳地区的红树林一致；远河口红树林湿地土壤平均厚度约60 cm，其土壤有机碳含量为(8.35±0.94)～(38.3 ± 2.53) g·kg －1，表层土壤有机碳含量最高，且有机碳含量随土壤深度的增加呈双峰递减型，在40 cm处有另一峰值；在水平方向上，远河口红树林土壤有机碳平均含量(0～60 cm)随离海洋距离的增加而降低；远河口红树林在近海、中间、近陆区域的土壤有机碳含量依次为22.12±2.57，14.83±1.01和13.18±1.20 g·kg －1，且近海和近陆区域的土壤有机碳含量差异显著( P ＜0.05)；各样地土壤有机碳含量与其 pH均显著负相关(P＜0.05)，其原因有待进一步研究。
기우야외실지조사，연구아국해남청란항홍수림습지리문창하하구화해양적거리대홍수림토양유궤탄분포적영향급토양유궤탄여 pH적관계。결과표명：재취양구역내，청란항홍수림토양유궤탄함량고、분포심；근하구각양지토양 pH위4.9～6.2，원하구각양지토양 pH위7.9～8.5；근하구홍수림토양후도재85 cm 이상，취양구내토양유궤탄함량위(9.1±1.08)～(66.2 ± 5.17) g·kg －1，차수토양심도증가선승고후강저，재60～70 cm 처유궤탄함량체도최고；재수평방향상，근하구홍수림토양유궤탄평균함량( 0～80 cm )수리해양거리적증가이강저，근해、중간、근륙구역적토양유궤탄평균함량의차위(36.76±3.04)，(35.12±3.78)화(17.20±1.56) g·kg －1；근하구홍수림근해화근륙구역적토양유궤탄평균함량차이현저(P＜0.05)；근하구홍수림토양유궤탄함량적분포특정여밀극라니서아적아포화파로지구적홍수림일치；원하구홍수림습지토양평균후도약60 cm，기토양유궤탄함량위(8.35±0.94)～(38.3 ± 2.53) g·kg －1，표층토양유궤탄함량최고，차유궤탄함량수토양심도적증가정쌍봉체감형，재40 cm처유령일봉치；재수평방향상，원하구홍수림토양유궤탄평균함량(0～60 cm)수리해양거리적증가이강저；원하구홍수림재근해、중간、근륙구역적토양유궤탄함량의차위22.12±2.57，14.83±1.01화13.18±1.20 g·kg －1，차근해화근륙구역적토양유궤탄함량차이현저( P ＜0.05)；각양지토양유궤탄함량여기 pH균현저부상관(P＜0.05)，기원인유대진일보연구。
Mangrove ecosystems play an important role in carbon sequestration. A survey was carried out along two transects of mangroves in Qinglangang, Hainan Island, where the most typical mangrove community in China is distributed. This study aimed at evaluating site effect on carbon sequestration and its relationship with pH. One of the transects was located in a site far away from the sea ( more than 500 m) ,the other near the sea ( less than 100 m) . Along each transect,three soil columns ( seaward,interior,landward) were withdrawn using a PVC pipe. Each soil column was separated into sections of 5 cm interval. Soil samples from each section were analyzed for carbon content and pH. The main results are as follows. The pH of mangrove soil far from sea ranged from 4. 9 to 6. 2,compared with a much higher pH of around 8. 0 near sea. The SOC content in the soil far from sea ranged from (9. 1 ± 1. 08) g·kg -1 to( 66. 2 ± 5. 17) g·kg -1 ,with an average soil depth of about 85 cm. The SOC content increased with soil depth until 60 -70 cm,then the SOC decreased. Along each transect,the SOC content decreased with the distance away from sea. The SOC contents of seaward,interior,landward were (36. 76 ± 3. 04) g·kg -1,(35. 12 ± 3. 78) g·kg -1,(17. 20 ± 1. 56) g·kg -1, respectively. There was significant difference in SOC content between seaward site and landward site. The change patterns of the mangrove SOC far from sea in Qinglangang were consistent with that of Yap and Palau mangrove in Micronesia. The SOC content of transect near sea ranged from 8. 35 ± 0. 94 g·kg -1 to (38. 3 ± 2. 53) g·kg -1,with an average depth of about 60 cm. The SOC content generally decreased with depth but with a small peak at 40cm. Average SOC contents of seaward,interior,landward were (22. 12 ± 2. 57) g·kg -1,(14. 83 ± 1. 01) g·kg -1,(13. 18 ± 1. 20) g·kg -1, respectively. The SOC content was significantly different between seaward and landward sites. The SOC content of all samples had significant negative relationship with the soil pH.