In July 2018,taking plantations of Acacia crassicarpa A.Cunn.ex Benth.,A.melanoxylon R.Br.,A.cincinnata F.Muell.,A.auriculiformis A.Cunn.ex Benth.,and A.mangium Willd.as research objects in Zhangzhou City of Fujian Province,the homeosta-sis characteristics of N,P,K and C∶N,C∶P,C∶K and N∶P of their mature leaves were studied,in order to reveal the ecological adap-tation strategies of different Acacia species.The results show that:there were differences in the internal stability index of leaf elements of different Acacia species,except for the N homeostasis index of A.melanoxylon R.Br.,the HN of the other four Acacia species be-longed to the sensitive type,and the P and K homeostasis indices of the five Acacia species were sensitive.The stoichiometric ratio of elements was significantly higher than the elemental content,and the C∶N stability indices of Acacia species were all steady-state,The HC∶P,HC∶K,and HN∶P of Acacia species generally showed weakly stable or steady state types(except for HC∶P of A.auriculiformis A.Cunn.ex Benth.,HC∶K of A.cincinnata F.Muell.and HN∶P of A.mangium Willd.).In conclusion,Acacia crassicarpa A.Cunn.ex Benth.had higher HC∶P and HC∶K,A.melanoxylon R.Br.had higher HN and HN∶P,and A.cincinnata F.Muell.had higher HP and HC∶N,indicating that different Acacia species had different adaptability to the external environment,and Acacia species with higher homeo-stasis had stronger adaptability to the corresponding soil nutrient variation.
维普
万方数据
