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不同相思人工林叶片养分化学计量的内稳性特征

Internal Stability Characteristics of Nitrogen,Phosphorus and Potassiumin the Leaves of Different Acacia Plantations
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摘要 于2018年7月在福建省漳浦县中西国有林场,以厚荚相思(Acacia crassicarpa A.Cunn.ex Benth.)、黑木相思(A.melanoxylon R.Br.)、卷荚相思(A.cincinnata F.Muell.)、直干大叶相思(A.auriculiformis A.Cunn.ex Benth.)和马占相思(A.mangium Willd.)为研究对象,研究其成熟叶片N、P、K及其C∶N、C∶P、N∶P的内稳性特征,以期揭示不同相思树种对环境的生态适应策略。结果表明:不同相思树种叶片各元素内稳性指数存在差异,除黑木相思N的内稳性指数为弱稳态型外,其它4种相思HN均属于敏感型,5种相思P和K的内稳性指数均为敏感型;元素化学计量比的内稳性指数明显高于元素含量,相思树种C∶N内稳性指数均为稳态型,相思树种HC∶P、HC∶K和HN∶P普遍表现为弱稳态或稳态型(直干大叶相思HC∶P、卷荚相思HC∶K和马占相思HN∶P除外)。总之,厚荚相思具有较高的HC∶P和HC∶K,黑木相思具有较高的HN和HN∶P,卷荚相思具有较高的HP和HC∶N,说明不同相思树种对外界环境的适应能力不同,较高内稳性的相思物种对相应土壤养分变异的适应能力更强。 In July 2018,taking plantations of Acacia crassicarpa A.Cunn.ex Benth.,A.me lanoxylon R.Br.,A.cincinnata F.Muell.,A.au riculiformis A.Cunn.ex Benth.,and A.mangium Willd.as research objects in Zhangzhou City of F ujian Province,the homeostasis characteristics of N,P,K and C∶N,C∶P,C∶K and N∶P of their m ature leaves were studied,in order to reveal the ecological adaptation strategi es of different Acacia species.The results show that:there wer e differences in the internal stability index of leaf elements of different Acaciaspecies,exce pt for the N homeostasis index of A.melanoxylon R.Br.,the H N of the other fou r Acacia species belonged to the sensitive type,and the P and K homeostasis ind ices of the five Acacia species were sensitive.The stoichiometr ic ratio of elem ents was significantly higher than the elemental content,and the C∶N stability indices of Acacia species were all steady-state,The H C∶P,H C∶K,and HN∶Pof Acacia species generally showed weakly stable or steady sta te types(except for H C∶P of A.auriculiformis A.Cunn.ex Benth.,H C∶K of A.cincinnata F.Muell.and H N∶P of A.mangium Willd.).In conclusion,Acacia crassicarpa A.Cunn.ex Benth.had higher H C∶P and H C∶K,A.melanoxylon R.Br.had higher H Nand H N∶P,and A.c incinnata F.Muell.had higher H P and H C∶N,indicating that different Acacia species had different adaptability to the external environment,and Aca cia species with higher homeostasis had stronger adaptability to the correspondi ng soil nutrient variation.
作者 毛梦圆 陈宇龙 吴培衍 周丽丽 李树斌 潘辉 MAO Mengyuan;CHEN Yulong;WU Peiyan;ZHOU Lili;LI Shubin;PAN Hui(College of Resources and Environment,Fujian Agriculture and Forestry University,Fuzhou 350002,Fujian,China;College of Geography and Oceanography,Minjiang University,Fuzhou 350108,Fujian,China;College of Forestry,Fujian Agriculture and Forestry University,Fuzhou 350002,Fujian,China;Linxia national forest farm,Longhai,Longhai 363112,Fujian,China)
出处 《福建林业科技》 2024年第1期14-17,37,共5页 Journal of Fujian Forestry Science and Technology
基金 福建省林业科学技术研究项目(2022FKJ30) 福州市科技计划项目(2022-S-004)。
关键词 相思人工林 内稳性 化学计量比 叶片 土壤 Acacia plantation homeostasis stoich iometric ratio leaf soil
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