LAN Xin,LIU Yang,ZHANG Yu,et al.Effect of Urban Environment on Growth and Photosynthesis in Transplanted Pinus tabulaeformis With Different Initial Sizes[J].Northern Horticulture,2017,41(13):102-107.[doi:10.11937/bfyy.20165038]
城市环境对不同形态大小油松苗木生长和光合效能的影响
- Title:
- Effect of Urban Environment on Growth and Photosynthesis in Transplanted Pinus tabulaeformis With Different Initial Sizes
- Keywords:
- urban-rural difference; urban forest; photosynthetic production; seedling quality; extended photoperiod
- 文献标志码:
- A
- 摘要:
- 城市化的快速发展需要大量苗木满足绿化需求，但是不同育苗处理后的绿化苗木在城市环境中的生长表现仍比较模糊。现以油松（Pinus tabulaeformis）实生苗为试材，采用不同光周期培育的方法，研究了光周期处理对苗木移栽城市环境后的生长和光合效能的影响，以期为适合城市环境的苗木培育方法提供参考。结果表明：与郊区环境相比，城市环境促进了苗木地上部分的生长却抑制了根系的伸长；移栽至城市环境中苗木的净光合速率为负值并显著低于郊区，但是气孔导度和蒸腾速率却较高；育苗期间的补光处理并未与苗木移栽位置之间产生任何交互作用，补光处理也未影响苗木的净光合速率和胞间CO2浓度，却提高了气孔导度和蒸腾速率。该研究表明，城市环境导致新栽苗木处于高消耗状态，育苗期间的补光处理并不能改变苗木在城市环境中的生长状况。
- Abstract:
- Fast development of urbanization results in a large request of tree transplant to meet the demand for urban greening.With the aim to supply theoretical evidence to urban greening,Pinus tabulaeformis seedlings were cultured as materials under contrasting photoperiods to quantify responses of growth and photosynthesis of transplanted seedlings to urban environment.The results showed that compared with the rural environment,seedlings transplanted in urban environment had greater shoot morphological growth but depressed root length.They had negative values of net photosynthesis rate but higher stomotal conductance and transpiration rate than those in rural area.Extended photoperiod during seedling culture did not resulted in any significantly interactive effect with the factor of urban-rural locations;also it failed to affect net photosynthesis rate and intercellular CO2 concentration.In contrast,the longer cultural photoperiod resulted in higher stomotal conductance and transpiration rate.In conclusion,urban environment imposed transplanted seedlings at a high-consumption status,which could not be improved by solely treatment of extended photoperiod during seedling culture.
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备注/Memo
第一作者简介：兰欣（1983-），男，本科，工程师，研究方向为城市园林绿化。E-mail：86292725@qq.com.责任作者：魏红旭（1983-），男，博士，助理研究员，研究方向为城市森林与苗木生理生态学。E-mail：weihongxu@iga.ac.cn.基金项目：国家自然科学基金资助项目（31600496）；“十三五”国家重点研发计划资助项目（2016YFC0500300）。