文献类型：期刊文献

中文题名：栎树幼苗化学计量特征对尾矿库环境的响应

英文题名：Stoichiometric characteristics of oak seedlings in response to tailing pond environment

作者：何文祥[1,2] 施翔[2] 汪阳东[2] 罗明杨[3] 卢孟柱[1]

第一作者：何文祥

机构：[1]浙江农林大学林业与生物技术学院,省部共建亚热带森林培育国家重点实验室,杭州311300;[2]中国林业科学研究院亚热带林业研究所,杭州311400;[3]安吉县龙山林场,浙江湖州313306

年份：2024

卷号：43

期号：4

起止页码：1025-1035

中文期刊名：生态学杂志

外文期刊名：Chinese Journal of Ecology

收录：CSTPCD;;Scopus;北大核心:【北大核心2023】；CSCD:【CSCD2023_2024】；

基金：中央级公益性科研院所基本科研业务费专项资金项目(CAFYBB2019SZ001,CAFYBB2018ZB001-3)资助。

语种：中文

中文关键词：废弃尾矿;栎树;碳氮磷;化学计量学特征

外文关键词：abandoned tailing;Quercus spp.;carbon,nitrogen and phosphorus;stoichiometric characteristic

分类号：S792.18;X173

摘要：探讨废弃尾矿环境下不同种栎树及栎树各器官C、N、P含量及其化学计量特征的变化,对阐明其在逆境环境中生物量积累及健康状态具有重要意义。通过盆栽试验,分析比较柳叶栎(Quercus phellos)、北方红栎(Quercus rubra)、黑栎(Quercus velutina)、樱皮栎(Quercus pagoda)、牛栎(Quercus michauxii)、大果栎(Quercus macrocarpa)、弗吉尼亚栎(Quercus virginiana)和白栎(Quercus fabri)等8种栎树在红壤(对照)和废弃尾矿土壤中生长3年的生物量和各器官碳(C)、氮(N)和磷(P)含量,分析其化学计量特征。结果表明:8种栎树均能在重污染的尾矿土壤中生长,但其生物量均较红壤中生长的植株有不同程度下降,其中黑栎、牛栎和大果栎生长表现较好;尾矿环境下栎树不同器官C含量与对照相比无显著差异,而N、P含量则显著下降;红栎组栎树根系N、P含量显著高于白栎组,但叶片和茎中N、P含量在栎树组间无显著差异;整体而言,N、P含量在不同器官间表现为叶片>根系>茎;与对照相比,尾矿环境下各树种叶片、茎和根系C∶N和C∶P值增加,N、P利用效率提高,且白栎组N、P利用效率高于红栎组;红壤和尾矿环境下各栎树N∶P范围分别为6.66~11.74和9.96~13.22;相关性分析表明,栎树生物量与N、P含量及其化学计量比密切相关,且各器官N、P含量呈极显著正相关;栎树生物量,C、N、P含量及其化学计量比在不同环境下的响应差异显著,使得其适应废弃尾矿环境的能力存在差异;其根系受尾矿影响较小,因此可较好地获取养分资源,并优先将N、P分配到叶片中,同时通过提高养分利用效率的方式来调节自身养分分配以适应尾矿环境,栎树生长受N、P共同限制,适量增施养分有助于提高栎树在铅锌尾矿土壤中耐性表现,其中大果栎可作为尾矿库治理优先选择树种。
Investigating C,N and P contents and the stoichiometric characteristics of various organs of oak trees under abandoned tailings is of great significance for elucidating biomass production and health status under adverse environment.With a pot experiment,seedlings of Quercus phellos,Quercus rubra,Quercus velutina,Quercus pagoda,Quercus michauxii,Quercus macrocarpa,Quercus virginiana and Quercus fabri were grown in red soil(control)and mine tailings for three years.The biomass and carbon(C),nitrogen(N)and phosphorus(P)contents of leaves,stems,and roots were measured,and the stoichiometric characteristics were analyzed.The results showed that the seedlings of all the eight species could survive in the tailings.The biomass of all species decreased in different degrees compared with the control,with Q.velutina,Q.michauxii and Q.macrocarpa performing well.There was no significant difference in C content in different organs of seedlings in tailing environment compared with the control,but the N and P contents decreased significantly.The N and P contents in roots of Quercus section Lobatae were significantly higher than that of Quercus section Quercus,but different sections did not significantly influence the N and P contents in leaves and stems.The contents of N and P in different organs were leaf>root>stem.The C∶N and C∶P values in different organs of each species in the tailing treatment was significantly higher than that in the control,with higher N and P use efficiency.Moreover,N and P use efficiency in the Quercus section Quercus was higher than that in the Quercus section Lobatae.The N∶P of each species in the control and tailing environment was 6.66-11.74 and 9.96-13.22,respectively.Biomass of seedlings across different species was closely correlated with N and P contents and stoichiometric ratio.N and P contents in each organ were significantly positively correlated each other.Different responses in biomass,C,N and P contents and their stoichiometric ratios in different organs,species and sections were observed under different substrate environments,which resulted in different adaptability of oak trees to mine tailing environment.Oak trees could efficiently obtain nutrient resources,and preferentially allocate N and P to leaves while root system was less affected by tailing.Oak trees could adjust nutrient allocation by improving nutrient use efficiency to adapt to heavy metal environment.The growth of oak trees was colimited by N and P.Appropriate fertilizer application can improve the tolerance performance of oak in Pb-Zn tailing soil.Q.macrocarpa may be the preferred species for tailing pond management.