CAJ | 학술논문

结合桂林会仙岩溶湿地生态环境情况，研究了湿地不同土地利用方式对土壤有机碳、总磷、总氮等营养元素含量的变化和影响，结果表明：（1）土壤中磷元素的含量，住宅用地＞水田＞岩溶湿地（原生湿地）＞未利用荒地（闲置地）＞坑塘水面（鱼塘），全钾最高的是未利用荒地（闲置地），有机质含量最高的是岩溶湿地（原生湿地），各形态的氮元素中硝态氮含量最多的是住宅用地，全氮最高的是未利用荒地；（2）土地利用与土地覆被的变化加剧了土壤有机碳、硫、氮磷的流失，导致湿地退化，未利用荒地退化指数-0.128、鱼塘退化指数-0.177、水田退化指数0.137、住宅用地退化指数0.39；（3）退化的原因是主要是人类活动的过分干扰。因此，有必要科学合理地对湿地进行恢复。
결합계림회선암용습지생태배경정황，연구료습지불동토지이용방식대토양유궤탄、총린、총담등영양원소함량적변화화영향，결과표명：（1）토양중린원소적함량，주택용지＞수전＞암용습지（원생습지）＞미이용황지（한치지）＞갱당수면（어당），전갑최고적시미이용황지（한치지），유궤질함량최고적시암용습지（원생습지），각형태적담원소중초태담함량최다적시주택용지，전담최고적시미이용황지；（2）토지이용여토지복피적변화가극료토양유궤탄、류、담린적류실，도치습지퇴화，미이용황지퇴화지수-0.128、어당퇴화지수-0.177、수전퇴화지수0.137、주택용지퇴화지수0.39；（3）퇴화적원인시주요시인류활동적과분간우。인차，유필요과학합리지대습지진행회복。
Combined with the ecological environment of Huixian karst wetland in Guilin City, the authors studied the impact of different land use modes on soil nutrients of wetland such as organic carbon, total nitrogen and total phosphorus. The results of study are as below:(1)Contents of phosphorus in soil:Residential land>Paddy field>Karst wetland(native wetland)>Unused land(Idle land)>Pond(fish pond);unused land(Idle land)has the highest total potassium; karst wetland(native wetland)has the highest organic contents; residential land has the highest nitrate nitrogen content;unused land has the highest total nitrogen;(2)Change of land use and land cover accelerate losses of organic carbon, sulfur, nitrogen and phosphorus in soil, and lead to degradation of wetlands, of which the degradation index is-0.128 for unused land;-0.177 for fish pond;0.137 for paddy field;0.39 for residen-tial land;(3)Excessive interference of human activities is the major cause for land degradation, so scientific and ra-tional restoration of wetland is necessary.