遮阴对白三叶叶片解剖结构和光合特性的影响  

Effects of Shading on the Leave Anatomical Structure and Photosynthetic Characteristics of White Clover

作　　者：杨文权[1] 褚继鹏 寇建村[2] 赵娇[2] 韩明玉[3] 

机构地区：[1]西北农林科技大学生命科学学院,陕西杨凌712100 [2]西北农林科技大学动物科技学院,陕西杨凌712100 [3]西北农林科技大学园艺学院,陕西杨凌712100

出　　处：《草地学报》2015年第3期653-656,共4页Acta Agrestia Sinica

基　　金：国家自然科学基金项目(31302027);国家苹果产业技术体系项目(CARS-28);陕西省科技厅重大项目(2011KTZB02-02);现代农业产业技术体系建设专项资金(CARS-35-40);西北农林科技大学博士科研启动基金项目(2013BSJJ070)资助

摘　　要：为掌握果草复合系统中白三叶(Trifoliurn repens)对苹果树(Malus pumila)遮阴的适应性机理,研究不遮阴、遮阴50%和遮阴70%条件下白三叶叶片解剖结构和光合特性的变化。结果表明:随着苹果树遮阴程度的增加,白三叶叶面积、上表皮细胞厚度、海绵组织厚度增加,其余解剖结构指标均减小,净光合速率(P_n)降低;上表皮厚度、海绵组织厚度与P_n成显著负相关关系,与其他指标成显著正相关关系。说明遮阴使白三叶叶片结构改变,光合速率降低。In order to learn the adaptability mechanism of white clover in the system of orchard and grass, the anatomical structures and photosynthetic characteristics of white clover leave were studied under noshading, 50% shading and 70% shading, respectively. The results showed that the leaf area, upper epidermis thickness and spongy tissue thickness of white clover increased, whereas the other indexes of anatomical structure and Pn decreased as the increases of shading from apple tree. The upper epidermis thickness and the spongy tissue thickness were negatively correlated to Pn, whereas other indexes were positively correlated to Pn. In conclusion, the shading changed the anatomical structures of white clover leave and caused the decrease of photosynthetic rate.

关 键 词：苹果园 白三叶 遮阴 解剖结构 光合参数 

分 类 号：S541.2[农业科学—作物学]