不同遮荫环境对小粒种咖啡光合作用的影响  

Effects of Different Shading on Photosynthesis of Coffea arabica

作　　者：萧自位[1] 白学慧[1] 肖兵[1] 苏琳琳[1] 张枝润 马关润 XIAO Ziwei;BAI Xuehui;Xiao Bing;SU Linlin;ZHANG Zhirun;MA Guanrun(Yunnan Dehong Tropical Agriculture Research Institute,Ruili 678600,China)

机构地区：[1]云南省德宏热带农业科学研究所,云南瑞丽678600

出　　处：《热带农业科技》2023年第2期69-74,共6页Tropical Agricultural Science & Technology

基　　金：云南省镇康县咖啡产业科技特派团(202204BI090009);国家科技资源共享服务平台:国家热带植物种质资源库。

摘　　要：为深入了解不同遮荫条件下小粒种咖啡的光合作用能力,测定和分析了遮光率为33%(遮荫Ⅰ)和59%(遮荫Ⅱ)时咖啡树的光合作用参数。结果表明,遮荫Ⅰ环境下荫质和遮荫效果均小于遮荫Ⅱ,咖啡树光合作用能力明显低于遮荫Ⅱ;在饱和光强下,两种遮荫环境下咖啡树叶片的CO_(2)净吸收率(A)主要受气孔因素(l_(s))限制。适当地提高咖啡园的荫质和遮荫效果能够有效增加光能利用效率,而降低叶片的气孔限制能够增加CO_(2)净吸收率。In order to deeply understand the photosynthetic capacity of Coffea arabica under different shading conditions,the photosynthetic parameters of coffee trees with shading rates of 33%(Shading Ⅰ)and 59%(Shading Ⅱ)were measured and analyzed.The results showed that the shading quality and shading effect in Shading Ⅰ environment were lower than those in Shading Ⅱ environment.The photosynthetic capacity of coffee trees under shade Ⅰ was significantly lower than that under shade Ⅱ.Under saturated light intensity,the net CO_(2)absorption rate(A)of coffee tree leaves under two shading environments is mainly limited by the air hole factor(l_(s)).Properly improving the shade quality and shading effect of cof-fee gardens can effectively increase the efficiency of light energy utilization,while reducing the stomatal limitation of leaves can increase the net CO_(2) absorption rate.

关 键 词：小粒种咖啡 光合作用 遮荫效果 光照强度 

分 类 号：S571.2[农业科学—作物学]