| 杨育苗,蒋志荣,安力,罗建,张永文.旱砂地两种籽瓜光合日变化及光响应研究[J].干旱地区农业研究,2018,36(5):47~53 |
| 旱砂地两种籽瓜光合日变化及光响应研究 |
| Diurnal variation of photosynthesis and light intensity response of two seed watermelons in dry sandy land |
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| DOI：10.7606/j.issn.1000-7601.2018.05.08 |
| 中文关键词: 旱砂地 籽瓜 光合日变化 光响应 灰色关联度 |
| 英文关键词:the dry sandy land seed watermelon diurnal variations of photosynthesis light response grey correlation analysis |
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| 摘要点击次数: 1642 |
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| 中文摘要: |
| 以靖远压砂地籽瓜试栽品种“黑丰1号”和主栽品种“靖远大板”为试材，测定籽瓜的光合参数，比较两个品种籽瓜的光合特性差异。结果表明，黑丰1号光饱和点(3 818.18 μmol·m -2·s-1)、光补偿点(67.47 μmol·m-2·s-1)均高于靖远大板，说明其对光照强度的要求较高；黑丰1号在较高光照条件下光合能力大于靖远大板，且在强光条件下黑丰1号的水分利用率更高（12∶00为203%），抗旱保水性更强；两种籽瓜蒸腾速率（Tr）与其净光合速率（Pn）、气孔导度（Gs）及胞间CO2浓度（Ci）相关性显著，且Ci与其它三个光合指标的相关系数均为负，变化趋势相反；同一类型籽瓜个体间的各光合指标也存在着显著差异，个体间Gs差异较小，Ci差异较大；灰色关联度分析发现净光合速率（关联序1）及光合有效辐射（关联序2）是影响当地籽瓜光合能力最主要的两个参数，试验当地条件更适于黑丰1号的生长。 |
| 英文摘要: |
| Photosynthetic indexes of ‘Heifeng 1’ and ‘Jingyuan daban’ at Jingyuan county’s dry sandy land were analyzed to detect photosynthetic differences between the two varieties. The results showed that both light saturation point （3 818.18 μmol·m -2·s-1) and light compensation point (67.47 μmol·m-2·s-1) of Heifeng 1 were higher than which of ‘Jingyuan daban’ for its higher demand light intensity . Photosynthetic capacity, water use efficency （203% at 12∶00）and drought resistance of Heifeng 1 were higher than which of Jingyuan daban under strong light condition. Tr of two seed watermelons correlated significantly to the Pn, Gs and Ci while Ci coreelated negtively to other indexes with adverse tren. There were significant differences in the photosynthetic indexes of the same varitiey of seed watermelon, the difference of Gs among individuals was not significant, and the difference of Ci was relatively significant. Grey correlation analysis showed that Pn (correlated order 1) and PAR (correlated order 2) were key indexes to affect photosynthetic capacity of watermelons. The finds suggest Heifeng 1 prefer to local conditions. |
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