| 摘要: |
| 【目的】为探讨井式节水灌溉与漫灌两种灌溉方式对中龄灰枣不同生育期光合生理指标的影响，【方法】采用Li-6400光合仪测定两种灌溉方式下中龄灰枣树光合参数日变化与月变化特征。【结果】①井式灌溉方式多数生育期净光合速率（Pn）日变化呈现“双峰”曲线分布，部分生育期呈“单峰”曲线，其中井式灌溉落叶期与成熟期表现为“单峰”曲线，峰值分别为9.07μmol/m2·s和22.18μmol/m2·s，漫灌展叶期与落叶期为“单峰”曲线，峰值分别为16.64μmol/m2·s和9.54μmol/m2·s，两种灌溉各生育期Pn日均值整体差异不显著，成熟期最大，落叶期最小，与中龄灰枣月光合变化规律相符，且净光合速率（Pn）都受气孔导度（Gs）与蒸腾速率（Tr）共同调节。② 两种灌溉气孔导度（Gs）与蒸腾速率（Tr）月变化规律与净光合速率（Pn）月变化趋势高度相似。③两种灌溉之间各生育期日变化和月变化光合参数整体差异不显著，但井式灌溉条件下光合指标分布更加规律。【结论】：井式灌溉在有效节水前提下满足中龄灰枣光合所需，不会致使其生物量降低。 |
| 关键词: 井式灌溉；漫灌；中龄灰枣；光合特性 |
| DOI： |
| 分类号:S665.1 |
| 基金项目:国家林业公益性行业重大专项项目（新疆特色林果提质增效关键技术研究与示范，项目编号：201304701-2） |
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| Photosynthetic differences of middle-aged grey Ziziphus jujuba ‘Huizao’ trees at different growth stages under two irrigation methods |
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wang he ping,zhang zhi gang
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College of Resources and Environment Science, Xinjiang University
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| Abstract: |
| 【Objective】In order to explore the effects of well-type water-saving irrigation and flood irrigation on photosynthetic physiological indexes of middle-aged grey jujube at different growth stages, 【Method】Li-6400 photosynthetic apparatus was used to measure the diurnal and monthly variation characteristics of photosynthetic parameters of middle-aged grey jujube under the two irrigation methods.【Result】 ① The diurnal variation of net photosynthetic rate (Pn) in most growth periods of well irrigation showed a "double peak" curve distribution, while some growth periods showed a "single peak" curve, among which the peak values of well irrigation in deciduous period and mature period were 9.07 μ mol/m2 s and 22.18 μ mol/m2 s, respectively, and the leaf spreading period and deciduous period were "single peak" The peak values were 16.64 μ mol/m2 s and 9.54 μ mol/m2 s, respectively. There was no significant difference in the daily mean value of Pn in each growth period between the two kinds of irrigation, which was the highest in mature period and the lowest in deciduous period, which was consistent with the changing law of moonlight photosynthesis in middle-aged grey jujube. The net photosynthetic rate (Pn) was both regulated by stomatal conductance (Gs) and transpiration rate (Tr). ② The monthly changes of stomatal conductance (Gs) and transpiration rate (Tr) of the two irrigation schemes are highly similar to the monthly changes of net photosynthetic rate (Pn). ③ There is no significant difference between the two kinds of irrigation on the whole in the diurnal and monthly changes of photosynthetic parameters in each growth period, but the distribution of photosynthetic indexes is more regular under the condition of well irrigation. Conclusion: 【Conclusion】Well irrigation can meet the photosynthetic requirements of middle-aged grey jujube under the premise of effective water saving, and will not reduce its biomass. |
| Key words: Well irrigation; Flooding; middle-aged grey Ziziphus jujuba; Photosynthetic characteristics |
