新疆杂交榛良种光合作用对生态因子的响应  被引量:5

Photosynthetic responses of hybrid hazel fine breeds to ecological factors in Xinjiang, Northwest China

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作  者:宋锋惠[1,2] 罗青红 史彦江 俞涛 寇云玲[1,2] 

机构地区:[1]新疆农业大学林学与园艺学院,乌鲁木齐830053 [2]新疆林科院造林治沙研究所,乌鲁木齐830063

出  处:《生态学杂志》2013年第5期1148-1154,共7页Chinese Journal of Ecology

基  金:2011年中央财政林业科技推广示范资金项目"杂交榛良种繁育圃建设与标准化栽培技术推广";新疆自治区科技支疆项目"杂交榛优良品种绿枝扦插技术引进与示范"资助

摘  要:在夏季田间条件下,研究了4种新疆平欧杂交榛的光合特性。结果表明:4个品种的光饱和点(LSP)、光补偿点(LCP)、CO2饱和点(CSP)、CO2补偿点(CCP)分别位于1195.27~1620.63μmol·m-2·s-1、34.03~87.80μmol·m-2·s-1、1188.50~1617.05μmol·mol-1和64.88~99.15μmol·mol-1;新榛1号和新榛4号表现出低光合低蒸腾的特点,新榛2号具有较低的LCP和较高的LSP,表现出对光能利用范围较大、光合潜力高的特点,新榛3号的LCP和LSP均较大,同时具有低的CCP和高的CSP及表观羧化效率(CE),其最大净光合速率(Pmax)(31.55μmol·m-2·s-1)明显高于其他品种(24.63~25.45μmol·m-2·s-1);此外,与常温(25℃)相比,新榛1号的净光合速率(Pn)受40℃高温的影响较其他品种显著,新榛3号的气孔导度(Gs)比其他品种受影响的程度轻。This paper studied the photosynthetic characteristics of four hybrid hazel fine breeds (Nos. 1-4) in Xinjiang under field conditions in summer. The light saturation point (LSP) of Nos. 1-4 varied from 1195.27 to 1620.63 μmol·m^-2·s^-1, light compensation point (LCP) varied from 34.03 to 87.80 μmol·m^-2·s^-1, CO2 saturation point (CSP) varied from 1188.50 to 1617.05 μmol · mol^-1, and CO2 compensation point (CCP) varied from 65.88 to 99. 15 μmol · mol^-1. The No. 1 and No. 4 showed the characteristics of low photosynthetic rate (Pn) and low transpiration (Tr ), the No. 2 showed lower LCP and higher LSP, indicating a wider scope of light energy utilization and higher photosynthetic potential, while the No. 3 possessed the highest LCP and LSP, higher CSP and CE, but lower CCP, showing the higher photosynthet- ic capacity (P 31.55 μmol·m^-2·s^-1) than the others (24.63-25.45 μmol·m^-2·s^-1). As compared with that at normal temperature (25 ℃ ) , the Pn of the No. 1 was more affected by high temperature (40℃), while the Gs of the No. 3 was lesser affected than that of the others.

关 键 词:杂交榛 光合作用 光合有效辐射 胞间CO2浓度 温度 

分 类 号:S664.4[农业科学—果树学]

 

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