晚秋低温对苜蓿叶片光合特性的影响  

Effect of low temperatures on photosynthetic characteristics of Medicago sativa leaves in late autumn

作　　者：王晓龙 杨曌 徐艳霞 柴华 李莎莎 吴玥 王建丽[2] 钟鹏 WANG Xiao-long;YANG Zhao;XU Yan-xia;CHAI Hua;LI Sha-sha;WU Yue;WANG Jian-li;ZHONG Peng

机构地区：[1]黑龙江省农业科学院畜牧兽医分院,黑龙江齐齐哈尔161005 [2]黑龙江省农业科学院草业研究所,黑龙江哈尔滨150086

出　　处：《饲料研究》2023年第22期137-140,共4页Feed Research

基　　金：黑龙江省自然科学基金资助项目(项目编号:YQ2022C033);黑龙江省科研院所科研业务费项目(项目编号:CZKYF2021-2-B025);齐齐哈尔市科技计划创新激励项目(项目编号:CNYGG-2021009);黑龙江西北部抗寒耐干旱苜蓿新品种设计与培育项目(项目编号:2022ZD040120402)

摘　　要：试验筛选适宜黑龙江地区种植的苜蓿种质材料,旨在探究晚秋环境下苜蓿叶片光合性能的变化规律。以6个苜蓿品种为试验材料,对叶片水汽压、气孔导度、净光合速率、蒸腾速率和胞间CO_(2)浓度进行测定,利用隶属函数评价出优异的苜蓿品种。结果显示,龙牧801的净光合速率和水分利用效率最高;草原3号的气孔导度和胞间CO_(2)浓度最高;草原3号和龙牧801的蒸腾速率显著高于其他品种(P<0.05);草原3号、龙牧801和皇后苜蓿叶片水汽压显著高于其他品种(P<0.05)。运用隶属函数对品种的光合性能进行评价,各品种的光合强弱顺序为:龙牧801>草原3号>皇后>康赛>阿迪娜>赛迪。研究表明,龙牧801和草原3号的光合性能较强,适宜黑龙江地区种植。The study aimed to explore the changes of the photosynthetic performance of Medicago sativa leaves in late autumn by screening alfalfa germplasm materials suitable for planting in Heilongjiang Province.Six Medicago sativa varieties were used as experimental materials.Photosynthetic indexes,including leaf water vapor pressure,stomatal conductance,net photosynthetic rate,transpiration rate and intercellular CO_(2)concentration,were measured.Excellent Medicago sativa varieties were selected by a membership function evaluation.The results showed that the net photosynthetic rate and water use efficiency of Longmu 801 were the highest.The stomatal conductance and intercellular CO_(2)concentration of Caoyuan No.3 were the highest.The transpiration rate of Caoyuan No.3 and Longmu 801 was significantly higher than that of other varieties(P<0.05).The leaf water vapor pressure of Caoyuan No.3,Longmu 801 and Queen was significantly higher than that of other varieties(P<0.05).Membership functions were used to evaluate the photosynthetic performance of varieties.The photosynthetic performance of Medicago sativa varieties,ranked from high to low,was as follows:Longmu 801>Caoyuan No.3>Queen>Concept>Adrenalin>Sardi.The study indicates that Longmu 801 and Caoyuan No.3 have strong photosynthetic performance and were suitable for planting in Heilongjiang.

关 键 词：苜蓿 光合特性 低温 相关性评价 

分 类 号：S816[农业科学—饲料科学]