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不同引进地被竹种光合生理特征比较
潘雁红,毕毓芳,吴志庄,杜旭华
0
(国家林业局竹子研究开发中心,浙江省竹子高效加工重点实验室,杭州 310012)
摘要:
通过探讨6个国外引进的地被竹种光合生理特征,掌握引进地被竹种的栽培特性,丰富园林地被植物资源,为观赏地被竹种的高效培育和园林化利用提供科学依据。选取掌叶笹竹、熊笹竹、多枝笹竹、青丝赤竹、大笹竹和白纹椎谷笹竹为试验材料,用Licor-6400型便携式光合作用测定系统测量叶片的即时光合作用、光响应和CO2 响应特征。结果表明:(1)6个竹种中,白纹椎谷笹竹、青丝赤竹和大笹竹的即时光合作用显著强于熊笹竹和多枝笹竹;(2)光响应结果显示,白纹椎谷笹竹和青丝赤竹具有高最大净光合速率(Pmax)、低光补偿点(LCP)和普通饱和点(LSP),掌叶笹竹和大笹竹具有高Pmax、低LCP和高LSP,熊笹竹和多枝笹竹则表现为低Pmax、高LCP和普通LSP;(3)CO2响应结果显示,青丝赤竹和白纹椎谷笹竹具有较高的CO2饱和最大光合速率、羧化速率和较低的CO2补偿点、饱和点,熊笹竹和多枝笹竹具有较低的CO2饱和最大光合速率、羧化速率和较高的CO2补偿点、饱和点。因此,青丝赤竹和白纹椎谷笹竹光能、CO2利用率较高,可以在光照较弱的区域栽植;掌叶笹竹和大笹竹光合能力强,且适生区域较广;熊笹竹和多枝笹竹光合能力弱,应利用设施栽培以满足园林、盆景等小范围的需求。
关键词:  植物引种  地被竹  光合作用  光响应  CO2响应
DOI:10.13610/j.cnki.1672-352x.20170419.018
投稿时间:2016-08-25
基金项目:浙江省省院合作林业科技项目(2014SY08), 浙江省自然科学基金项目(Y3110441), 中国林科院中央级公益性科研院所基本科研业务费专项资金项目(CAFYBB2012025)和浙江省科技计划项目(2014F10047)共同资助。
Differences in photosynthesis characters of six introduced dwarf bamboos
PAN Yanhong,BI Yufang,WU Zhizhuang,DU Xuhua
(Key Laboratory of High Efficent Processing of Bamboo of Zhejiang Province,China National Bamboo Research Center, Hangzhou 310012)
Abstract:
Photosynthesis characters of 6 bamboo species, which were introduced from other countries, were measured with Li-6400XT portable photosynthesis measuring system. To comprehensive evaluate the photosynthetic capacity of 6 bamboo species, we researched the photosynthesis and its response characters to light and CO2. This research can help to understand the cultivation physiology and promote the?efficient?technique?of directing cultivation for ornament sympodial bamboo.? The results showed that the photosynthesis net rate of 3 species (Sasa tsuboiana and Sasaella glabra f. albostriata) significantly higher than Sasa veitchii (carr.)Rehd and Sasaella ramose. And according the results of photosynthesis responded to light, S. tsuboiana and S. glabra f. albostriata had higher net photosynthetic rates (Pmax), lower light compensation point(LCP), normal light saturation point (LSP), while Sasa palmate f. nebulosa and Sasa admirabilis had similar characters to S. tsuboiana and S. glabra f. albostriata, except the relative higher LSP. Otherwise, S. veitchii (carr.)Rehd and S. ramose had lower Pmax, higher LCP, and normal LSP. Furthermore, the results on the CO2 responses analysis showed that S. tsuboiana and S. glabra f. albostriata also had higher Amax, higher carbonation efficiency, lower CO2 saturation point (CSP), and CO2 compensation point (CCP), but S. veitchii (carr.)Rehd and S. ramose were in opposite. Thus, S. tsuboiana and S. glabra f. albostriata were suggested to be planted widely and utilized as key species for their high use efficiency of light and CO2. S. palmate f. nebulosa and S. admirabilis had high photosynthesis capacity, but they were suggested be planted at lower-light area for their LSP. S. veitchii (carr.)Rehd and S. ramose had lowest comprehensive photosynthesis capacity, and were suggested be cultivated with facility cultivation technique to meet the demand in a small area.
Key words:  introduced plant  dwarf bamboo  photosynthesis  photosynthesis response to light curve  photosynthesis response to CO2 curve

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