文献类型：期刊文献

中文题名：磷胁迫对不同种源枫香生长及氮、磷吸收利用率的影响

英文题名：Effects of phosphorus stress on the growth and nitrogen and phosphorus absorption of different Formosan sweet gum provenances

作者：冷华妮[1,2] 陈益泰[1] 段红平[2] 饶龙兵[1] 王永军[3] 胡韵雪[4]

第一作者：冷华妮

机构：[1]中国林业科学研究院亚热带林业研究所,浙江富阳311400;[2]云南农业大学资源与环境学院,昆明650201;[3]吉林省农业科学研究院环境与农业资源研究中心,长春130033;[4]四川农业大学林学园艺学院,四川雅安625014

年份：2009

卷号：20

期号：4

起止页码：754-760

中文期刊名：应用生态学报

外文期刊名：Chinese Journal of Applied Ecology

收录：MEDLINE(收录号：19565751);CSTPCD;;Scopus(收录号：2-s2.0-67650702007);北大核心:【北大核心2008】；CSCD:【CSCD2011_2012】；PubMed;

基金：国家科技支撑计划项目(2006BAD03A1401);浙江省科技厅重大项目(2006C12065)资助

语种：中文

中文关键词：枫香;种源;磷水平;生物量;营养整合;磷效率;叶片N/P

外文关键词：Formosan sweet gum ; provenance ; phosphorous level ; biomass ; nutritional integration ; P efficiency ; leaf N/P ratio.

分类号：S722;S792.99

摘要：基于枫香(Liquidambar formosana)作为先锋树种的生态价值及南方红壤缺磷的现状,采用裂区设计,以不同磷水平模拟磷胁迫砂培处理枫香三叶期幼苗,研究7个种源枫香对磷水平的响应差异.结果表明:不同种源枫香间耐磷胁迫差异显著.随磷胁迫的加剧,各种源的生物量和氮、磷吸收量减少,而利用率增加.高磷处理条件下,南昌和宜兴种源枫香生物量和氮、磷吸收量较高,利用率较低,南丹种源枫香的氮、磷利用率较高,吸收量较低;低磷处理时,南昌和南丹种源枫香的磷吸收量、利用率和生物量均较高.说明高磷时,枫香高生物量种源呈高效吸收;而低磷时,则呈高效吸收和高效利用的特点.南昌种源是优良的耐磷胁迫种源,南丹种源次之;磷不是枫香的限制性养分因子.叶片Δ(N/P)、磷效率和生物量可作为确定枫香耐磷胁迫的指标.
Aiming at the ecological value of Formosan sweet gum （Liquidambarformosana） as a pioneer species and the status of red soil phosphorus （P） deficiency, a sand culture experiment of split design was conducted to study the responses of three-leaf stage seedlings of seven Formosan sweet gum provenances from Yixing of Jiangsu, Jingxian of Anhui, Yongkang of Zhejiang, Nan- chang of Jiangxi, Shaowu of Fujian, Yanping of Fujian, and Nandan of Guangxi to four levels of P （P0, P1/2, P1 , P2）. With increasing P stress, the biomass and the N and P absorption of test provenances decreased, whereas the utilization efficiency increased. In higher P treatments, the provenances from Nanchang and Yixing had higher biomass and higher N and P absorption but lower utilization efficiency, while the provenance from Nandan had lower N and P absorption but higher utilization efficiency. In lower P treatments, the biomass and the P absorption and utilization efficiency of the provenances from Nanchang and Nandan were all higher. All the results illustrated that the provenances with high biomass had high P absorption at high P level, and had both high P absorption and high utilization efficiency at low P level. The provenance from Nanchang could be considered to be an excellent P stress-resistant provenance, followed by that from Nandan. Phosphorus was not a limiting nutritional factor of Formosan sweet gum, biomass, leaf Δ（N/P） ratio and P efficiency could be used as the indicators of P stress-tolerance of Formosan sweet gum provenances.