北京地区引种菊苣在不同水分条件下光合与蒸腾特性初探  

Study on Chicory′s Photosynthesis and Transpirationunder Different Water Treatments in Beijing

作　　者：赵风华[1] 陈阜[1] 

机构地区：[1]中国农业大学农学与生物技术学院,北京100094

出　　处：《华北农学报》2005年第2期63-65,共3页Acta Agriculturae Boreali-Sinica

基　　金："十五"国家重点科技攻关项目(2001BA508B23);北京市科技计划项目(H020720010630)共同资助

摘　　要：根据北京地区的气候特点设置水分充足、中度干旱和干旱3个处理,考查生理生态特性的规律和3个生育时期(莲坐叶丛期、抽薹初期、现蕾期)间的变化规律。研究结果表明,菊苣叶片的净光合速率和蒸腾速率都有双峰型日变化规律;土壤水分不足能明显降低菊苣叶片的净光合速率和蒸腾速率,加剧或提前菊苣"光午休"现象的发生。菊苣在抽薹初期对水分缺失反应较敏感。叶片净光合速率和蒸腾速率存在弱的二次线性相关关系。According to the climate of Beijing, three water treatments were given to the chicory: sufficient soil water treatment, middling drought treatment, drought treatment. Study on the changes of day photosynthetic rat and transpiration rat in three development stages, which includes leaf stage, cauline stage and bud stage. There is nooning phenomenon in chicory. Its net photosynthetic rat (Pn) of leaf climbs up to the peak value in the leaf stage, then goes down, and rises a little in the stage of budding. As far as transpiration rat (Tr) is concerned, the result is: bud stage > cauline stage > leaf stage. Low soil moisture can affect Pn and Tr, and leads to nooning phenomenon happen easier. There is quadratic linear relationship between Pn and Tr.

关 键 词：北京地区 菊苣 蒸腾特性 水分条件 叶片净光合速率 引种 生理生态特性 蒸腾速率 线性相关关系 日变化规律 气候特点 生育时期 研究结果 现蕾期 双峰型 干旱 抽薹 土壤 午休 

分 类 号：S636.9[农业科学—蔬菜学] Q945.172[农业科学—园艺学]