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| 榆林地区不同鲜食枣品种光合日变化与环境因子的相关性研究 |
| Correlation between Diurnal Variation of Photosynthesis and Environmental Factors in Different Fresh-eating Jujube Varieties in Yulin Area |
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| DOI： |
| 中文关键词: 鲜食枣 品种 光合特性 生理生态因子 |
| 英文关键词:Fresh-eating jujube Varieties Photosynthetic characteristics Physiological and ecological factors |
| 基金项目:陕西省重点研发计划项目(2019TSLNY03-01)。 |
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| 摘要点击次数: 123 |
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| 中文摘要: |
| 研究陕西榆林地区不同引种鲜食枣光合特性的差异，分析不同品种之间的光合日变化和其他因子的相关性，选择适应当地的鲜食枣品种，以期为应用优良鲜食枣品种提供参考。本试验使用GFS-3000仪器，测定陕西榆林沙地环境自然条件下四种不同的鲜食枣品种（濮阳糖枣、冷白玉、早脆蜜、金矮四号）的光合日变化，分析不同生理生态因子和光合日变化的关系。净光合速率日平均值大小分别是：濮阳糖枣>冷白玉>金矮四号>早脆蜜；蒸腾速率日平均值表现为：金矮四号>早脆蜜>冷白玉>濮阳糖枣；四种鲜食枣的净光合作用速率（Pn）具有双峰特征，且四个品种的两次峰值均出现在9∶00和15∶00；各品种Pn受不同生理生态因子影响，与光合有效辐射（PAR）、蒸腾速率（Tr）、相对湿度（RH）呈极显著（P<0.01）或显著相关（P<0.05），胞间二氧化碳（Ci）呈极显著负相关（P<0.01）。4个鲜食枣品种中，比较适宜在榆林沙地栽植的品种是濮阳糖枣和冷白玉。 |
| 英文摘要: |
| To investigate the variations in photosynthetic characteristics among different introduced fresh-eating jujube varieties in Yulin, Shaanxi Province, analyze the diurnal variation of photosynthesis among these varieties and examine their correlation with other factors, this study seeks to identify and recommend local fresh-eating jujube varieties. The goal is to provide a reference for the application of excellent fresh-eating jujube varieties. The GFS-3000 instrument was used in this experiment to measure the diurnal variation of photosynthesis in four different fresh-eating jujube varieties (Puyangtang jujube, Lengbaiyu jujube, Zaocuimi jujube, Jin'ai No.4 jujube) under the natural conditions of the sandy land in Yulin, Shaanxi Province. The relationship between various physiological, ecological factors and diurnal variation of photosynthesis was analyzed. The daily average value of net photosynthetic rate followed the order of Puyangtang jujube >Lengbaiyu jujube >Jin'ai 4 jujube >Zaocuimi jujube; The daily average transpiration rates were as follows: Jin'ai 4 jujube >Zaocuimi jujube >Lengbaiyu jujube >Puyang Tangzao jujube; The net photosynthetic rate (Pn) of four fresh-eating jujube had double peaks, with the two peaks for all four varieties occurring at 9:00 and 15:00; Influenced by different physiological and ecological factors, Pn for each variety showed a significant correlation with photosynthetic effective radiation (PAR), transpiration rate (Tr), and relative humidity (RH) (P<0.01) or a significant correlation at the 5% level (P<0.05).Intercellular carbon dioxide (Ci) was found to be significantly negatively correlated (P<0.01). Among the four fresh-eating jujube varieties, Puyangtang jujube and Lengbaiyu are more suitable for planting in Yulin sandy land. |
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