柏明娥, 唐建军, 洪利兴, 丁伟华, 朱汤军, 陈欣. 两种基质条件下美丽胡枝子对模拟中度干旱胁迫的响应[J]. 中国生态农业学报(中英文), 2009, 17(3): 549-553. DOI: 10.3724/SP.J.1011.2009.00549
引用本文: 柏明娥, 唐建军, 洪利兴, 丁伟华, 朱汤军, 陈欣. 两种基质条件下美丽胡枝子对模拟中度干旱胁迫的响应[J]. 中国生态农业学报(中英文), 2009, 17(3): 549-553. DOI: 10.3724/SP.J.1011.2009.00549
BAI Ming-E, TANG Jian-Jun, HONG Li-Xing, DING Wei-Hua, ZHU Tang-Jun, CHEN Xin. Response of spiffy bushclover (Lespedeza formosa) to simulated moderate drought stress in two growth substrates[J]. Chinese Journal of Eco-Agriculture, 2009, 17(3): 549-553. DOI: 10.3724/SP.J.1011.2009.00549
Citation: BAI Ming-E, TANG Jian-Jun, HONG Li-Xing, DING Wei-Hua, ZHU Tang-Jun, CHEN Xin. Response of spiffy bushclover (Lespedeza formosa) to simulated moderate drought stress in two growth substrates[J]. Chinese Journal of Eco-Agriculture, 2009, 17(3): 549-553. DOI: 10.3724/SP.J.1011.2009.00549

两种基质条件下美丽胡枝子对模拟中度干旱胁迫的响应

Response of spiffy bushclover (Lespedeza formosa) to simulated moderate drought stress in two growth substrates

  • 摘要: 筛选利用适用树种是困难立地植被恢复中的关键技术之一。本研究选用两种基质栽培美丽胡枝子, 通过人工调控土壤水分模拟中度干旱胁迫, 研究美丽胡枝子对干旱胁迫的响应和美丽胡枝子的耐旱性及基质类型对植物耐旱性的影响。结果表明, 与正常水分处理相比, 干旱胁迫处理导致美丽胡枝子叶片相对含水量和叶绿素含量下降, 叶片脯氨酸含量、可溶性糖含量和丙二醛含量升高, 植株的生长高度、地上和地下部分生物量下降; 两种基质条件下美丽胡枝子对干旱胁迫的响应趋势相似, 但与贫瘠基质比较, 营养基质条件下的美丽胡枝子表现出更强的抗旱性。研究表明, 美丽胡枝子种植于干旱困难立地条件, 尤其是在营养基质辅助条件下, 表现出较好的抗旱性, 美丽胡枝子与营养基质配合, 可作为干旱困难立地植被恢复的候选措施之一。

     

    Abstract: Application of high-stress tolerant tree species is a key technique for the restoration of degraded soils. Hence a drought-stress experiment was conducted to determine drought tolerance of spiffy bushclover (Lespedeza formosa) in two growth substrates (nutrient-rich and nutrient-deficient) under greenhouse conditions. The results show that leaf saturation deficiency, chlorophyll content, plant height, and root and shoot biomass of spiffy bushclover under drought stress significantly decrease compared with conventional irrigation conditions. On the other hand, proline content, soluble sugar content and malondialdehyde (MDA) in functional leaves of spiffy bushclover significantly increase under drought-stress. Plants in nutrient-rich substrate have higher tolerance to simulated drought than those in nutrient-deficient substrate. It is therefore concluded that spiffy bushclover could be a drought-tolerant species suitable for vegetation restoration on dry eco-sites, and nutrient-rich substrates enhance spiffy bushclover performance and drought tolerance.

     

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