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草地学报  2014 

不同暖季型草坪草种耐淹性能评价

DOI: 10.11733/j.issn.1007-0435.2014.05.017, PP. 1021-1030

Keywords: 草坪草,种质资源,河岸带,耐淹性,评价

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Abstract:

为明确我国南方河岸带广泛分布的几种植物在其原始生境季节性淹水胁迫下的生长情况,设置对照(不进行水淹,常规供水管理)、半淹(水位刚好淹没土面)和全淹(水位淹没并高于植株7cm)3个处理,时间为30d,利用相对修剪干重、相对恢复干重、相对地上部分干重和相对根系干重等指标,对几种暖季型草坪草的水淹胁迫下生长情况进行综合评价。结果表明不同草坪草资源的耐淹性差异明显,在半淹处理30d后,耐淹性由强到弱依次为伪针茅(Pseudoraphisspinescens)>双穗雀稗(Paspalumdistichum)>杂交狗牙根(Cynodondactylon×C.transvaalensis)>假俭草(Eremochloaophiuroides)>海滨雀稗(Paspalumvaginatum)>狗牙根(Cynodondactylon);在全淹处理30d后,伪针茅和双穗雀稗的耐淹性最好,其植株能够迅速长出水面,而其余草种一直淹没在水中生长受到严重抑制,几乎停滞,综合分析后得到全淹处理下耐淹性由强到弱为伪针茅>双穗雀稗>杂交狗牙根>狗牙根>海滨雀稗>假俭草。同一种草坪草资源在半淹胁迫下其生长受到的伤害明显小于全淹胁迫,而不同生境的同种草坪草其耐水淹能力亦存在明显差异。表明伪针茅PX02、双穗雀稗P018、双穗雀稗P019、双穗雀稗P020、杂交狗牙根C751、杂交狗牙根C807及狗牙根C291具有较强的耐淹性,是理想的河岸带植被重建植物资源。

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