生态学杂志2024，Vol.43Issue(5)：1300-1306,7.DOI:10.13292/j.1000-4890.202405.043
云南松苗木氮磷钾化学计量比与个体大小间相对关系
Allometric relationship between the stoichiometric ratio of nitrogen,phosphorus,potassium and plant size of Pinus yunnanensis seedlings
摘要
Abstract
The aim of this study was to examine the allometric relationships among nutrient elements including nitrogen(N),phosphorus(P),potassium(K)contents and their stoichiometric ratios(N∶P,N∶K,P∶K)and the size of two-years-old Pinus yunnanensis seedlings.Biomass of root,stem,needle and individual plant,and the contents of N,P,K were measured.The relationships were analyzed and the fitting models were built between biomass and nutrient element contents and stoichiometric ratios.The results showed that N,P,K contents were characterized by needle＞stem＞root,and that the nutrient contents of all organs and individual plant were character-ized by K＞N＞P.The stoichiometric ratios differed among organs.We found higher N∶P and N∶K in needle,low-er N∶P and N∶K in root,higher P∶K in root,and middle N∶P and N∶K in stem.P∶K in stem and needle was similar.There were significant positive correlations between biomass and nutrient contents in root,stem,needle and individual plant(P＜0.01).Nutrient contents increased with increasing seedling size(biomass).There were negative correlations between N∶P ratios and biomass in root,stem,needle and individual plant.There were posi-tive correlations between P∶K ratios and biomass in root,stem,needle and individual plant.The relationships be-tween N∶K and biomass were different in root,stem,needle and individual plant.N∶K was negatively correlated with biomass in needle and individual plant,but positively correlated with biomass in root and stem.The fitting models were constructed between nutrient contents and biomass,and between stoichiometric ratios and biomass.Our results revealed that the characteristics of N,P,K contents and seedling size,and the allometric relationships between stoichiometric ratios and seedling size of P.yunnanensis seedlings.关键词
C∶N∶P/营养元素/生物量/异速生长Key words
C∶N∶P/nutrient element/biomass/allometric growth引用本文复制引用
蔡年辉,胡兆柳,贺斌,成思丽,陈林,唐军荣,陈诗,许玉兰..云南松苗木氮磷钾化学计量比与个体大小间相对关系[J].生态学杂志,2024,43(5):1300-1306,7.基金项目
云南省万人计划青年拔尖人才专项(YNWR-QNBJ-2019-075)、国家自然科学基金项目(31860203)、云南省研究生导师团队建设项目(2022-97)和校科研基金(01108-18200133)资助. （YNWR-QNBJ-2019-075）
