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张觉, 吴初平, 沈柏春, 焦洁洁, 魏建芬, 江波. 干旱胁迫对不同栽培基质下常春藤光合特性的影响[J]. 浙江林业科技, 2018, 38(1): 69-76. DOI: 10.3969/j.issn.1001-3776.2018.01.011
引用本文: 张觉, 吴初平, 沈柏春, 焦洁洁, 魏建芬, 江波. 干旱胁迫对不同栽培基质下常春藤光合特性的影响[J]. 浙江林业科技, 2018, 38(1): 69-76. DOI: 10.3969/j.issn.1001-3776.2018.01.011
ZHANG Jue, WU Chu-ping, SHEN Bai-chun, JIAO Jie-jie, WEI Jian-fen, JIANG Bo. Effect of Different Cultivation Medium on Photosynthetic Properties of Hedera nepalensis var. sinensis under Drought Stress[J]. Journal of Zhejiang Forestry Science and Technology, 2018, 38(1): 69-76. DOI: 10.3969/j.issn.1001-3776.2018.01.011
Citation: ZHANG Jue, WU Chu-ping, SHEN Bai-chun, JIAO Jie-jie, WEI Jian-fen, JIANG Bo. Effect of Different Cultivation Medium on Photosynthetic Properties of Hedera nepalensis var. sinensis under Drought Stress[J]. Journal of Zhejiang Forestry Science and Technology, 2018, 38(1): 69-76. DOI: 10.3969/j.issn.1001-3776.2018.01.011

干旱胁迫对不同栽培基质下常春藤光合特性的影响

Effect of Different Cultivation Medium on Photosynthetic Properties of Hedera nepalensis var. sinensis under Drought Stress

  • 摘要: 夏季水分流失过快是导致垂直绿化植物萎蔫死亡的主要原因,为探讨干旱环境下不同垂直绿化基质对植物 光合性能的影响,比较了传统栽培基质、进口无土固态基质保浮科乐(Pafcal),国产无土固态基质炭棉(Tan Mian) 的保水性,并以1 年生常春藤Hedera nepalensis var. sinensis 幼苗为材料,采用自然干燥法控水,测定其在胁迫0 d, 10 d,20 d 及复水后10 d 的气体交换参数、光响应曲线及其特征参数和叶绿素含量变化,探讨常春藤在3 种基质 中的干旱适应能力。结果显示:(1)传统栽培基质的保水性最好,炭棉次之,保浮科乐最差;(2)在不同程度 干旱胁迫下,3 种基质中各参数的变化趋势基本一致,但保浮科乐中大部分参数值的变化幅度显著大于传统栽培 基质和炭棉;(3)常春藤在传统栽培基质中的总体干旱适应性最强,炭棉次之,保浮科乐最差,这与3 种基质的 保水性呈完全正相关;(4)在重度胁迫下,保浮科乐中常春藤各指标变化幅度较大,说明常春藤在保浮科乐基质 中不能忍受长期的干旱胁迫;(5)复水后,常春藤在传统栽培基质和炭棉中恢复较好,在保浮科乐基质中恢复较差。

     

    Abstract: Experiments were conducted on comparisons on relative water content of common cultivation medium(pine bark: peat: pearlite: river sand=5:4:0.6:0.4), ‘Pafcal’ and ‘Tan Mian’ for 30 days, and on drought stress to 1-year Hedera nepalensis var. sinensis seedlings planted in above-mentioned three medium during July the 1st to 30th 2015. Determinations were implemented on the photosynthetic properties and chlorophyll content in the 0 day(CK), 10th day, 20th day under drought stress and 10th day after rehydration by air seasoning method. The result showed that relative water content was the highest in common medium, followed by ‘Tan Mian’ and ‘Pafcal’. Photosynthetic parameters of seedling in the tested medium under drought stress had similar variation, however that in ‘Pafcal’ was significantly larger. H. nepalensis var. sinensis had the strongest drought adaptability in the common medium, followed by ‘Tan Mian’ and ‘Pafcal’, the same order of relative water content. Photosynthetic parameters of seedlings in ‘Pafcal’ under severe drought stress had larger change, indicating that seedlings could not tolerate long-term drought stress in the medium. After rehydration, seedlings in the common medium and ‘Tan Mian’ had better recovered than that in ‘Pafcal’.

     

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