广西科学院学报2024，Vol.40Issue(2)：162-171,10.DOI:10.13657/j.cnki.gxkxyxb.20240709.008
不同喀斯特土壤类型下常见蕨类植物氮磷养分策略差异及其与土壤养分供给关系
Differences in Nitrogen and Phosphorus Nutrients Strategies of Common Ferns under Different Karst Soil Types and Their Rela-tionship with Soil Nutrient Supply
摘要
Abstract
Ferns are pioneer plants in karst ecosystems.It is of great significance for the restoration and recon-struction of degraded ecosystems to study their adaptation strategies to barren karst soils.In this study,the common fern plants,Cyclosorus interruptus(Willd.)H.Ito,Pteris ensiformis Burm.and Onychium siliculo-sum(Desv.)C.Chr.,distributed on both zonal yellow soil and non-zonal calcareous soil in Guizhou Botanical Garden,were used as test materials.The differences of nitrogen and phosphorus nutrient strategies of three common ferns in two karst soil types and their relationship with soil nitrogen and phosphorus nutrient supply were studied.The results showed that:①Tartaric acid,oxalic acid and malic acid were the main organic acids secreted by the roots of ferns on calcareous soil,while tartaric acid,malic acid and citric acid were the main organic acids secreted by the roots of ferns on yellow soil.The total amount of organic acids secreted by roots on calcareous soil was much higher than that on yellow soil.② Compared with the ferns growing on yellow soil,the dry matter accumulation,nitrogen and phosphorus uptake of ferns on calcareous soil were higher,which were 2.7 times,30.8％and 43.8％higher than those on yellow soil,respectively.③The average con-tents of nitrogen and phosphorus in the aboveground part of ferns were higher than those in the underground part under the two soil conditions.The N/P ratio of the aboveground part of ferns on calcareous soil was 13.17,and that on yellow soil was 11.35.④The nitrogen uptake of ferns under the two soil conditions was significantly positively correlated with the soil available phosphorus content,indicating that the absorption and utilization of soil nitrogen by ferns was limited by the content of available phosphorus in soil.In summa-ry,there were significant differences in the utilization and distribution strategies of nitrogen and phosphorus nutrients in ferns on the two soil types,and their effects on soil nutrient cycling were greater on calcareous soil than on yellow soil.关键词
喀斯特地区/不同土壤类型/蕨类植物/氮磷养分特征/养分适应策略Key words
karst areas/different soil types/the common ferns/N and P nutrient characteristics/nutrient adap-tation strategies分类
农业科技引用本文复制引用
庞丽,邹琼丽,吴霞,李家鑫,张明豪,张红霞..不同喀斯特土壤类型下常见蕨类植物氮磷养分策略差异及其与土壤养分供给关系[J].广西科学院学报,2024,40(2):162-171,10.基金项目
国家级大学生创新创业训练计划平台项目(202010667023),贵州省科学技术基金项目(黔科合LH字[2014]7497),贵州省科技拔尖人才项目(黔教合KY字[2020]040),贵州省教育厅自然科学研究项目(黔教合KY字[2018]008)和安顺学院博士基金项目(asubsjj201404)资助. （202010667023）
