| 上海崇明东滩互花米草种子产量与活性对刈割的响应 |
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| 引用本文： | 肖德荣,张利权,祝振昌,田昆.上海崇明东滩互花米草种子产量与活性对刈割的响应[J].生态环境,2011,20(11):1681-1686. |
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| 作者姓名： | 肖德荣 张利权 祝振昌 田昆 |
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| 作者单位： | 1. 国家高原湿地研究中心//西南林业大学,云南昆明,650224
2. 华东师范大学//可口海岸学国家重点实验室,上海,200026 |
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| 基金项目： | 国家自然科学基金，国家重点基础研究发展计划(973)前期研究专项 |
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| 摘 要： | 有性繁殖与种子扩散是互花米草（Spartina alterniflora）侵入新生境的重要途径,抑制有性繁殖是有效控制互花米草进一步扩散与二次入侵的关键。文章研究了刈割对互花米草种子产量及其活性的影响,结果表明：四月（生长初期）1次刈割在一定程度上促进了互花米草的有性繁殖,其每穗种子数（481.3粒）、种子平均生活力（36.7%）与对照每穗种子数（425.5粒）和种子平均生活力（41.3%）间不存在显著差异,表现出超量补偿现象。四月和七月（扬花期）2次刈割与扬花期1次刈割能有效抑制互花米草的有性繁殖,其种子的生产量（每穗种子数分别为186.3和173.6粒）与活性（分别为18.0%和17.3%）较对照显著降低,表现出不足补偿现象。四月和七月2次刈割与七月扬花期1次刈割对互花米草有性繁殖的控制效果较好。在互花米草管理与控制实践中,扬花期刈割是有效控制互花米草有性繁殖与扩散的重要途径。
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| 关 键 词： | 互花米草 种子产量 种子活性 刈割管理 崇明东滩 |
Response of seed production and viability of Spartina alterniflora to cutting at Shanghai Chongming Dongtan, China |
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| XIAO Derong,ZHANG Liquan,ZHU Zhenchang,TIAN Kun.Response of seed production and viability of Spartina alterniflora to cutting at Shanghai Chongming Dongtan, China[J].Ecology and Environmnet,2011,20(11):1681-1686. |
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| Authors: | XIAO Derong ZHANG Liquan ZHU Zhenchang TIAN Kun |
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| Institution: | XIAO Derong 1,ZHANG Liquan2,ZHU Zhenchang2,TIAN Kun1 1.National Plateau Wetland Research Center//Southwest Forestry University,Kunming 650224,China,2.State Key Laboratory of Estuarine and Coastal Research//East China Normal University,Shanghai 200062 |
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| Abstract: | Sexual propagation is the main mechanism for Spartina alterniflora to invade new habitats,and strategic cutting is a key method for effectively reducing its invasive possibilities.This paper studied the effects of cutting at different months and different frequencies on the seed production and viability of Spartina alterniflora.Seed production(481.3 seeds per spike) and viability(36.7%) following a single cutting in April,showed no significant differences with control(no cutting) plants(425.5 seeds per spik... |
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| Keywords: | Spartina alterniflora seed production and viability cutting management Chongming Dongtan |
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