CAJ | 학술논문

为探讨蕨类植物碳氮磷化学计量特征与土壤养分的关系，对福建省亚热带森林林下芒萁和乌毛蕨地上部分和地下部分的碳、氮、磷(C、N、P)含量和0~10 cm和10~20 cm两个土层的养分含量进行了测定。结果表明，无论是芒萁还是乌毛蕨，地上部分的N、P含量均高于地下部分，而C含量则无显著差异，导致地上部分的C∶N和C∶P均低于地下部分。与乌毛蕨相比，芒萁地上部分的N、P含量更低，地上和地下部分的C含量、C∶N和C∶P以及 N、P含量的变异系数和表型可塑性指数则更高，表明芒萁采取了较高的养分利用效率和“表现最大化”的策略，而乌毛蕨则选择了较低的养分利用效率和“表现维持”的方式。两种蕨类植物地上和地下部分的N含量与土壤N含量(0~20 cm)均无显著相关。芒萁两个部位的P含量则均与土壤P含量(0~10 cm和10~20 cm)呈显著正相关，乌毛蕨P含量总体上与土壤P含量的相关性不显著(除地下部分的P含量与10~20 cm土层的P含量呈弱的正相关外)。这表明芒萁具有作为亚热带森林土壤P库指示植物的潜力。
위탐토궐류식물탄담린화학계량특정여토양양분적관계，대복건성아열대삼림림하망기화오모궐지상부분화지하부분적탄、담、린(C、N、P)함량화0~10 cm화10~20 cm량개토층적양분함량진행료측정。결과표명，무론시망기환시오모궐，지상부분적N、P함량균고우지하부분，이C함량칙무현저차이，도치지상부분적C∶N화C∶P균저우지하부분。여오모궐상비，망기지상부분적N、P함량경저，지상화지하부분적C함량、C∶N화C∶P이급 N、P함량적변이계수화표형가소성지수칙경고，표명망기채취료교고적양분이용효솔화“표현최대화”적책략，이오모궐칙선택료교저적양분이용효솔화“표현유지”적방식。량충궐류식물지상화지하부분적N함량여토양N함량(0~20 cm)균무현저상관。망기량개부위적P함량칙균여토양P함량(0~10 cm화10~20 cm)정현저정상관，오모궐P함량총체상여토양P함량적상관성불현저(제지하부분적P함량여10~20 cm토층적P함량정약적정상관외)。저표명망기구유작위아열대삼림토양P고지시식물적잠력。
In order to determine the stoichiometric traits of two fern species and their relationships to soil available nutrient, the above- and belowground parts ofDicranopteris dichotomaandBlechnum orientaleand soils at 0–10 cm and 10–20 cm layers were collected from subtropical forests in Fujian Province, respectively. The carbon (C), nitrogen (N) and phosphorus (P) contents in plant and soil were measured. The results showed that N and P contents were signiifcantly higher in aboveground than those in belowground, while C content did not show signiifcant difference, which led to lower C∶N and C∶P ratios in aboveground. Compared withB. orientale,D. dichotomahad low N and P contents in aboveground; high C content, C∶N and C∶P ratios in both above- and belowground; high coefifcient of variation and phenotypic plasticity indices of N and P contents. These stoichiometric trends may indicate thatD. dichotomahad high nutrient use efifciency by maximizing its performance, whileB. orientalehad low nutrient use efifciency by sustaining its performance. N contents in both of the above- and belowground of two fern species were not signiifcantly correlated with available N in soil at depth from 0 to 20 cm. Total P content in soil (both in 0–10 cm and 10–20 cm layers), however, was signiifcantly and positively correlated with the P contents in both parts ofD. dichotoma, but not with those inB. orientale(only P content in belowground had weak positive correlation with total P content in soil of 10–20 cm layer. Therefore, it was suggested thatD. dichotomacould be a potential indicator of soil P availability in subtropical forests.