摘要
以云南干热河谷区的7个小粒咖啡品种为试验材料,利用LCpro-SD全自动便携式光合测定仪对其叶片的净光合速率、蒸腾速率、胞间CO 2浓度、气孔导度、水分利用效率等光合参数进行了测定。结果表明:大部分咖啡品种的净光合速率的日变化呈不对称的双峰曲线,有明显的光合“午休”现象,但‘紫叶’呈单峰曲线变化;7个品种的最大净光合速率表现为紫叶>埃塞俄比亚2号>T5175>矮卡(航天)>矮卡>埃塞俄比亚1号>DTARI;7个咖啡品种的气孔导度呈“J型”曲线变化趋势,其日均气孔导度排序为紫叶>矮卡>埃塞俄比亚1号>矮卡(航天)>T5175>埃塞俄比亚2号>DTAR;‘矮卡’的日均水分利用率最大,而‘DTARI’的最小。总之,‘紫叶’具有较强的光合性能(净光合速率、气孔导度、光能利用率),但是其水分利用率较低,对干旱的适应能力不足。
The net photosynthetic rate,transpiration rate,intercellular CO 2 concentration,stomatal conductance and water use efficiency of seven coffees(Aika,Ethiopia 1,Aika(Aerospace),Purple leaf,T5175,DTARI and Ethiopia 2)were measured by LCpro-SD automatic portable photosynthesis analyzer.The results showed the diurnal variation of net photosynthetic rate(PN)of most coffee varieties showed an asymmetric double peak curve,with obvious“noon break”phenomenon,while“Purple leaf”showed a single peak curve.The maximum net photosynthetic rate of 7 coffees was the order of Purple leaf>Ethiopia 2>T5175>Aika(Aerospace)>Aika>Ethiopia 1>DTARI.The curve of stomatal conductance was“J type”,and the stomatal conductance(GS)was the order of Purple leaf>Aika>Ethiopia 1>Aika(Aerospace)>T5175>Ethiopia 2>DTARI.The daily water use efficiency(Wu)of“Aika”was the highest,and that of“DTARI”was the lowest.To sum up,“Purple leaf”had strong photosynthetic performance(net photosynthetic rate,stomatal conductance and light energy utilization rate),but its water use efficiency was low.Its adaptability to drought was insufficient.
作者
胡发广
刘红明
毕晓菲
付兴飞
李贵平
李亚男
吕玉兰
黄家雄
HU Fa-guang;LIU Hong-ming;BI Xiao-fei;FU Xing-fei;LI Gui-ping;LI Ya-nan;LV Yu-lan;HUANG Jia-xiong(Tropical and Subtropical Economic Crops Institute,Yunnan Academy of Agricultural Science,Baoshan 678000,China)
出处
《江西农业学报》
CAS
2020年第10期52-56,共5页
Acta Agriculturae Jiangxi
基金
云南省科技入滇(国际科技合作)计划“老挝北部山区咖啡科技示范园建设项目”(2019IB013)
云南省重点研发计划“生态咖啡园栽培技术研究及质量控制体系构建及其应用”(2018ZG015)
云南省咖啡产业技术体系耕作与栽培技术研究项目(2019ZG015)。
关键词
云南
干热河谷
小粒咖啡
叶片
光合特性
日变化
Yunnan
Dry-hot valley
Coffea arabica
Leaves
Photosynthetic characteristics
Diurnal variation
