【摘 要】
：
为了解长期风胁迫对海防林的影响,对沿海6种林龄为8～10 a的防护林树种的叶片形态、光合特征及枝条抗性对长期风胁迫的响应特征进行了研究.结果表明,与未受风胁迫海防林相比,长期风胁迫显著降低了女贞(Ligustrum lucidum)、无患子(Sapindus mukorossi)、红楠(Machilus thunbergii)、栾树(Koelreuteria bipinnata)和弗栎(Quercus virginiana)的叶长和叶面积,也降低了女贞和栾树的叶宽和叶片分形指数;长期风胁迫显著降低了6种海
【机 构】
：
万源生态股份有限公司,浙江 台州 318000;浙江省台州市林业技术推广总站,浙江 台州 318000;中国林业科学研究院亚热带林业研究所,杭州 311400;浙江农林大学暨阳学院,浙江 诸暨 311
论文部分内容阅读
为了解长期风胁迫对海防林的影响,对沿海6种林龄为8～10 a的防护林树种的叶片形态、光合特征及枝条抗性对长期风胁迫的响应特征进行了研究.结果表明,与未受风胁迫海防林相比,长期风胁迫显著降低了女贞(Ligustrum lucidum)、无患子(Sapindus mukorossi)、红楠(Machilus thunbergii)、栾树(Koelreuteria bipinnata)和弗栎(Quercus virginiana)的叶长和叶面积,也降低了女贞和栾树的叶宽和叶片分形指数;长期风胁迫显著降低了6种海防林树种的净光合速率(18％～47％)以及无患子、栾树和弗栎的水分利用效率,而对女贞、红楠和乌桕(Sapium sebiferum)的没有显著影响.此外,受长期风胁迫影响,无患子、红楠和栾树枝条的极限荷载量和弹性模量均显著增加,与枝条直径的正相关性也进一步增强.因此,长期风胁迫会导致海防林树种光合能力下降,但林木个体可通过采取减小叶面积等的适应型策略以及增强枝条抗性等的忍受型策略来应对这种生理性亏缺.在海防林营造和修复的树种选择搭配上,可优先考虑将女贞、红楠和乌桕等栽植在长期受强风胁迫的区域.
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