【摘要】 以设施栽培环境下二年生软枣猕猴桃品种为试材，采用乙醇浸提法测定叶片的叶绿素含量、Li-6400XT便携式光合仪测定光合作用参数、光响应曲线等光合生理指标，研究了4个软枣猕猴桃品种叶片在设施环境下的光合特性差异，以期为新疆阿拉尔垦区筛选出适宜的栽培品种，并为其高产优质栽培提供基础数据。结果表明：4个软枣猕猴桃品种叶绿素含量‘龙城2号’最高；叶片净光合速率（Pn）和气孔导度（Gs）日变化曲线呈双峰型，蒸腾速率（Tr）日变化曲线呈单峰型。净光合速率（Pn）大小依次为‘龙城2号’>‘魁绿’>‘缤果’>‘康甜’。‘魁绿’光饱和点（LSP）、光补偿点（LCP）较高，‘龙城2号’最大净光合速率（Pnmax）、暗呼吸速率（Rd）较高，‘缤果’居中，‘康甜’最低。光合有效辐射（PAR）对净光合速率（Pn）影响较大，气孔导度（Gs）、蒸腾速率（Tr）、胞间CO₂浓度（Ci）、环境温度（Ta）、空气相对湿度（RH）等参数次之。累计方差贡献率为96.515%,4个软枣猕猴桃品种的综合得分排序依次为‘龙城2号’>‘魁绿’>‘缤果’>‘康甜’。综上，‘龙城2号’光合能力较高，水分利用率较好，对光的适应性较强，较适宜在南疆设施栽培下生长，‘魁绿’‘缤果’次之，‘康甜’最弱。更多还原

【Abstract】 Two-year-old Actinidia arguta varieties under protected cultivation environment were used as test materials.The chlorophyll content of leaves was determined by alcohol ethanol extraction method, and the photosynthetic physiological indexes such as photosynthetic parameters and light response curve were determined by Li-6400 XT portable photosynthesis instrument.The differences of photosynthetic characteristics of leaves of four Actinidia arguta varieties under protected cultivation environment were studied, in order to screen out suitable cultivated varieties in Alar Reclamation Area of Xinjiang and provide basic data for high yield and high quality cultivation.The results showed that the chlorophyll content of four Actinidia arguta varieties ‘Longcheng No.2’ was the highest.The diurnal variation curves of net photosynthetic rate（Pn） and stomatal conductance（Gs） were bimodal, and the diurnal variation curve of transpiration rate（Tr） was unimodal.The order of net photosynthetic rate（Pn） was ‘Longcheng No.2’>‘Kuilyu’>‘Bingo’>‘Kangtian’.The light saturation point（LSP） and light compensation point（LCP） of ‘Kuilyu’ were higher, the maximum net photosynthetic rate（Pnmax） and dark respiration rate（Rd） of ‘Longcheng No.2’ were higher, ‘Bingo’ was in the middle, and ‘Kangtian’ was the lowest.Photosynthetically active radiation（PAR） had a greater impact on net photosynthetic rate（Pn）,stomatal conductance（Gs）,transpiration rate（Tr）,intercellular CO₂ concentration（Ci）,ambient temperature（Ta）,air relative humidity（RH） and other parameters followed.The cumulative variance contribution rate was 96.515%,and the comprehensive score order of the four Actinidia arguta varieties was ‘Longcheng No.2’>‘Kuilyu’>‘Bingo’>‘Kangtian’.In summary, ‘Longcheng No.2’ had higher photosynthetic capacity, better water use efficiency, and stronger adaptability to light.It was more suitable for growth under protected cultivation in southern Xinjiang, followed by ‘Kuilyu’ and ‘Bingo’,and ‘Kangtian’ was the weakest.更多还原