火炬树单优群落下层与外缘4个树种光响应特征  

CHARACTERISTICS OF THE LIGHT RESPONSES OF 4 TREE SPECIES GROWING IN AND AT EDGE OF THE RHUS TYPHINA'S MONODOMINANT COMMUNITY

作　　者：张明如[1] 李小俊[2] 曹帮华[3] 吴刚[2] 

机构地区：[1]浙江农林大学旅游健康学院,临安311300 [2]浙江农林大学林业与生物技术学院,临安311300 [3]山东农业大学林学院,泰安271018

出　　处：《内蒙古农业大学学报（自然科学版）》2011年第1期118-124,共7页Journal of Inner Mongolia Agricultural University(Natural Science Edition)

基　　金：国家自然科学基金(30771709)

摘　　要：研究了火炬树(Rhus typhinaL.)单优群落下层与外缘的光照等生态因子差异和酸枣、荆条、黄栌和火炬树克隆分株的资源利用效率。利用C IRAS-2光合仪,并结合典型样株形态指标测定和小气候因子测定,比较分析了火炬树单优群落下层和外缘酸枣、荆条、黄栌和火炬树克隆分株光合参数。研究结果表明:1)火炬树单优群落下层与外缘相比,光量子大约减少91.2%;2)生长于火炬树单优群落外缘的酸枣、黄栌和火炬树克隆分株LUE和WUE超过了火炬树单优群落下层,而荆条差异较小。因此,初步认为火炬树单优群落下层生长的4个树种光能与水分利用效率相对较低。Using CIRAS- 2 portable photosynthesis system and combined with the measurement of mieroelimate and morphological indexes of the sample plants, the photosyhthetic parameters and the resource utilization efficiency of the clonal ramets of Rhus. typhina, Vitex negundo var. heterophylla, Ziziphus jujuba var. spinosa and Cotinus eoggygria growing in and at edge of the Rhus typhina＇s monodominant community were studied in this paper. The results showed as follow： 1 ）The light quantum in the R. typhina＇s monodominant community was 92.2% less than that at edge of the R. typhina＇s monodominant community ;2） Both the light use efficiency（LUE） and the water use efficiency （WUE） of the clonal ramets of Rhus. typhina, Ziziphus jujuba vat. spinosa and Cotinus coggygria growing in the Rhus typhina＇ s monodominant community were superior to that at edge of the Rhus typhina＇ s monodominant community, while there were much less differences between the two habitats growing for the V. negundo var. heterophylla. Thus it is concluded that the LUE and WUE of the 4 tree species above growing in the Rhus typhina＇s monodominant community is comparatively lower.

关 键 词：单优群落 资源利用效率 火炬树克隆分株 酸枣 荆条 黄栌 

分 类 号：S718.55[农业科学—林学]