| 不同覆盖栽培年限雷竹林光合生理研究 |
| |
| 引用本文： | 高贵宾,钟浩,吴志庄,李伟成,潘雁红,袁娜.不同覆盖栽培年限雷竹林光合生理研究[J].西北林学院学报,2016,31(2):92-97. |
| |
| 作者姓名： | 高贵宾 钟浩 吴志庄 李伟成 潘雁红 袁娜 |
| |
| 作者单位： | （1.国家林业局 竹子研究开发中心，浙江 杭州 310012;2.余杭区林业水利局，浙江 余杭 311100） |
| |
| 摘 要： | 为揭示覆盖栽培竹林生理生态变化机制，给竹林生态修复技术研究提供依据，分别对覆盖0、3、6、9 a和12 a雷竹林光合性状和光响应特征等进行研究。结果表明:竹林净光合速率（Pn）随覆盖年限增长，逐渐减小，在覆盖6 a时显著减小；气孔导度（Gs）随覆盖年限增长，逐渐减小，覆盖9 a时显著减小；覆盖6 a后竹林胞间CO2浓度（Ci）均高于覆盖0、3 a竹林；蒸腾速率（Tr）总体随竹林覆盖年限增长，逐渐减小，在覆盖3 a时即显著减小；竹林水分利用效率（WUE）以覆盖3 a竹林最高，覆盖12 a竹林最低；Pn与Gs呈极显著正相关，与Tr呈显著正相关，与Ci呈负相关，但相关不显著；竹林光响应过程中，光合有效辐射（PAR）达20 μmol·m-2·s-1后，覆盖3 a竹林Pn均高于其他竹林，PAR升高至400 μmol·m-2·s-1后，各竹林Pn以覆盖12 a竹林最低；覆盖3 a竹林潜在最大净光合速率（Pmax）最大，覆盖12 a竹林最小；覆盖0 a竹林光补偿点（LCP）最低，覆盖6 a后竹林LCP均在10.000 μmol·m-2·s-1以上；覆盖6 a竹林光饱和点（LSP）最高，达737.703 μmol·m-2·s-1。结论认为:覆盖对竹林光合作用起到制约作用，覆盖时间越长，竹林越难以形成可持续生产力；竹林覆盖至第6年，光合生理发生显著减弱，竹林种群受覆盖胁迫越来越严重，此时，需要及时养竹以更新竹林和采取有效的竹林恢复措施，同时，要重点开展竹林土壤生态修复技术研究，以促进实现竹林可持续经营。
|
| 关 键 词： | 雷竹 覆盖栽培 光合作用 光响应 |
Photosynthetic Physiology of Phyllostachys praecox cv.prevernalis in Different Mulching Cultivation Periods |
| |
| GAO Gui-bin,ZHONG Hao,WU Zhi-zhuang,LI Wei-cheng,PAN Yan-hong,YUAN Na. Photosynthetic Physiology of Phyllostachys praecox cv.prevernalis in Different Mulching Cultivation Periods[J].Journal of Northwest Forestry University,2016,31(2):92-97. |
| |
| Authors: | GAO Gui-bin ZHONG Hao WU Zhi-zhuang LI Wei-cheng PAN Yan-hong YUAN Na |
| |
| Institution: | (1.China National Bamboo Research Center,Hangzhou,Zhejiang 310012,China;2.Yuhang Forestry and Water Conservancy Bureau,Yuhang,Zhejiang 311100,China) |
| |
| Abstract: | To reveal the eco-physiological responses mechanism of mulching cultivation bamboo forest,and provide evidence for ecological rehabilitation of bamboo forest,photosynthetic traits and photoresponse of mulching 0 year,3 years,6 years,9 years,12 years Phyllostachys praecox cv.Prevernalis forests were studied.Results showed that with increased of mulching cultivation periods,net photosynthetic rate (Pn) of bamboo forest decreased gradually,it declined significantly when mulching 6 years.Stomatal conductance (Gs) decreased gradually with increased of mulching cultivation periods,it reduced significantly while mulching 9 years.After mulching 6 years,intercellular CO2 concentration (Ci) of bamboo forest was higher than mulching 0 year,3years forest.Mulching periods increased,transpiration rate (Tr) of bamboo forest decreased gradually on the whole,and decreased significantly while mulching 3 years.Water use efficiency (WUE) was highest in mulching 3 years bamboo forest,and lowest in mulching 12 years bamboo forest.Pn exhibited a very significant positive correlation with Gs,significant positive correlation with Tr,and showed negative correlation with Ci,but had no significance.After photosynthetically available radiation (PAR) reached 20 μmol·m-2·s-1 in the process of photoresponse of bamboo forest,the Pn of mulching 3 years bamboo forest was highest,after PAR reached 400 μmol·m-2·s-1,the Pn of mulching 12 years bamboo forest was lowest.Maximum Pn (Pmax) was highest in mulching 3 years bamboo forest,lowest in mulching 12 years bamboo forest.The light compensation point (LCP) was lowest in mulching 0 year bamboo forest,and it beyond 10.000 μmol·m-2·s-1 after mulching 6 years.The light saturation point (LSP) was highest in mulching 6 years bamboo forest,it reached 737.703 μmol·m-2·s-1.The results suggested that mulching cultivation restricted the photosynthesis of bamboo forest,mulching longer,it was more difficult to form sustainable productivity.While mulching 6 years,photosynthesis of bamboo forest decreased significantly,bamboo population suffered further stress,in this case,it was necessary to pause mulching cultivation to keep standing bamboo,and to use effective measures for bamboo forest recovery,meanwhile,it was more important to study ecological restoration technology of degraded soil of bamboo forest,and to realize the sustainable management of bamboo forest. |
| |
| Keywords: | Phyllostachys praecox cv prevernalisPhyllostachys praecox cv prevernalis mulching cultivation photosynthesis photoresponse |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《西北林学院学报》浏览原始摘要信息 |
| 点击此处可从《西北林学院学报》下载免费的PDF全文 |
|
