| 李文华,朱清科,赖亚飞,李宏生,徐怀同,刘广全.陕北黄土高原丘陵沟壑区沙棘的光合特性研究[J].干旱地区农业研究,2007,(1):135~139 |
| 陕北黄土高原丘陵沟壑区沙棘的光合特性研究 |
| The photosynthetic characteristics and water use efficiency in leaves of Hippophae rhamnoides L．in Northern Shaanxi |
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| DOI：10.7606/j.issn.1000-7601.2007.01.28 |
| 中文关键词: 沙棘 CO2补偿点 CO2饱和点 光补偿点 光饱和点 |
| 英文关键词:Hippophae rhamnoides L. CO2 compensation point CO2 saturation point light compensation point light saturation point |
| 基金项目:国际泥沙培训中心专项“吴旗县生态建设综合效益评价”； 西北农林科技大学校长专项 |
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| 中文摘要: |
| 利用便携式光合作用测定系统测定了陕北吴旗县沙棘年生长季内叶片净光合速率随光照强度和CO2浓度的变化规律,并测定了沙棘叶片的蒸腾速率(Tr)和水分利用率(WUE)。结果表明:沙棘叶片光补偿点(LCP)在年生长季内的变化范围为15.66~112.31μmol/(m2.s),光饱和点(LSP)变化范围为1 327.39~1 638.89μmol/(m2.s),表观光量子效率(Φ)的变化范围为0.0052~0.0122μmol/mol;沙棘叶片的CO2补偿点(CCP)在年生长季内的变化范围为120.83~278.29μmol/mol,CO2饱和点(CSP)的变化范围为192.24~775.59μmol/mol。表明沙棘为C3植物,不耐荫,宜栽植在阳光充足的地方。沙棘在年生长季内Tr的变化为:8月、9月高于6月、7月、5月;8月份的蒸腾速率最高,5月份的蒸腾速率最低;WUE高低排序为:9月>5月>8月>7月>6月。 |
| 英文摘要: |
| With the Li-6400 portable photosynthesis system the photosynthetic characteristics in leaves of Hippophae rhamnoides L.during different period was determined.The main results were as follows: the light compensation points(LCP) in leaves of Hippophae rhamnoides L.changed from 15.66 to 112.31(μmol/(m2·s)) in different period,the light saturation points(LSP) varied from 1 327.39 to 1 638.89(μmol/(m2·s)) and the apparent photon utilization efficiency varied from 0.0052 to 0.0122 μmol/mol;the CO2 compensation point(CCP) of photosynthesis varied from 120.83 to 278.29 μmol/mol;the CO2 saturation points(CSP) varied from 192.24 to 775.59 μmol/mol.The Tr of Hippophae rhamnoides L.is in Sept.and Aug.higher than in Jun.,Jul.and May,and is at the highest in Aug.,at the lowest in May;the WUE shows Sept.>May.>Aug.>Jun.>Jul. |
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