摘要
为了解不同栽培基质条件下荔波唇柱苣苔的光合生理特性,分别在田园土(CK)、泥炭土︰珍珠岩︰黄心土(2︰1︰1,A1)、腐殖土︰珍珠岩︰黄心土(2︰1︰1,A2)和腐殖土︰黄心土(2︰1,A3)4种不同栽培基质下,采用LI-6400XT测定荔波唇柱苣苔的光合参数及其影响因子的日变化。结果表明,4种栽培基质荔波唇柱苣苔的净光合速率[Pn,μmol/(m2·s)]日均值为A2(1.00)>A3(0.82)>A1(0.76)>CK(0.46)。不同栽培基质荔波唇柱苣苔(Pn)日变化均呈单峰曲线,无光合"午休现象";水分利用效率(WUE)日变化呈单峰曲线,气孔导度(Gs)和胞间CO2浓度(Ci)日变化与蒸腾速率(Tr)日变化趋势相似,呈双峰曲线。相关性分析表明,CK中Pn与Gs呈显著正相关;A1中Pn与相对湿度(RH)呈显著正相关;A2中Pn与Ci、空气温度(Ta)呈显著正相关;A3中Pn与Tr呈显著正相关;A1、CK中Tr与Gs呈显著正相关,A2、A3中Tr与Gs呈极显著正相关。不同栽培基质荔波唇柱苣苔的光合日进程有所不同,说明荔波唇柱苣苔的栽培中要考虑相应的栽培基质。
In order to understand the photosynthesis characteristic of Chirita liboensis in different substrate composition,the photosynthesis diurnal variation of Chirita liboensis were measured by LI-6400 XT portable photosynthetic system,and the substrate composition were bucolic soil(CK),peat soil︰perlite︰yellow clay(2︰1︰1,A1),humus soil︰perlite︰yellow clay(2︰1︰1,A2)and humus soil︰yellow clay(2︰1,A3).The results showed the the order of daily average net photosynthetic rate[Pn,μmol/(m2·s)]were A2(1.00)>A3(0.82)>A1(0.76)>CK(0.46).The curves of Pn diurnal variation were single peak curves with no obvious midday decrease in photosynthesis.The curves of water use efficiency(WUE)diurnal variation were single peak curves.The diurnal variation of stomatal conductance(Gs)and intercellular CO2concentration(Ci)were similar to transpiration rate(Tr),which were presented as double-peak curves.The correlation analysis demonstrated that there was significant positive correlation between Pn and Gs in CK;There was significant positive correlation between Pn and RH in A1;There was significant positive correlation among Pn and Ci,Ta in A2;There was significant positive correlation between Pn and Tr in A3;There was significant positive correlation between Tr and Gs in A1 and CK;There was significant positive correlation between Tr and Gs in A2 and A3.It showed that there was different in photosynthetic diurnal variation of Chirita liboensis among different substrate compositions,and this difference should be considered when cultivating.
作者
姜霞
李从瑞
陈志萍
王莲辉
JIANG Xia;LI Cong-rui;CHEN Zhi-ping;WANG Lian-hui(Guizhou Academy of Forestry,Guiyang Guizhou 550005,P.R.China)
出处
《西部林业科学》
CAS
北大核心
2020年第4期16-21,28,共7页
Journal of West China Forestry Science
基金
贵州省林业局项目“野生观赏花卉荔波唇柱苣苔培育技术研究(黔林科合[2016]02)”
贵州省科技厅项目“贵州苦苣苔科植物资源调查收集及栽培技术研究(黔科合支撑[2017]2523)”。
关键词
荔波唇柱苣苔
栽培基质
光合特性
Chirita liboensis
substrate composition
photosynthesis characteristics
作者简介
第一作者:姜霞(1981-),女,硕士,副研究员,主要从事森林生态学研究。E-mail:43644135@qq.com;通讯作者:李从瑞(1981-),女,高级工程师,主要从事森林生态、景观生态、植物资源方面的研究。E-mail:461164991@qq.com。
