| 土壤氮素与光照对盆栽珙桐幼苗光合参数的影响 |
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| 引用本文： | 宋天宇,刘艳红,姚毅.土壤氮素与光照对盆栽珙桐幼苗光合参数的影响[J].生态科学,2011,30(3). |
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| 作者姓名： | 宋天宇 刘艳红 姚毅 |
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| 作者单位： | 北京林业大学省部共建森林培育与保护教育部重点实验室,北京,100083 |
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| 基金项目： | "十一五"国家科技支撑项目:自然保护区濒危物种保护技术研究 |
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| 摘 要： | 珙桐是我国特有珍稀保护物种,在植物系统发育和地史变迁研究上有很高的学术地位,国内外学者进行了大量的研究.以濒危植物珙桐(Davidia involucrate)一年生幼苗为试验材料,通过控制土壤氮素含量与光照的方法,研究了不同土壤氮素含量(0mg、200mg、400mg、600mg、800mg)及是否遮光对珙桐幼苗生长和光合参数的影响,探讨土壤氮素及光照对珙桐幼苗生长的影响.结果表明:1)高氮素水平可以减缓在非适生环境下生长的珙桐幼苗光合速率的降低;2)适宜的直射光照可能对珙桐等喜阴植物的幼苗的生长是有利的;3)氮素对由遮光引起的光合参数的降低有补偿作用,但仍无法完全抵消由于遮光所引起的净光合速率的降低.
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| 关 键 词： | 珙桐幼苗 土壤氮素 光照 光合参数 |
Influence of soil nitrogen concentration and solar radiation on Davidia involucrate Baill seedlings' growth |
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| SONG Tian-yu,LIU Yan-hong,YAO Yi.Influence of soil nitrogen concentration and solar radiation on Davidia involucrate Baill seedlings' growth[J].Ecologic Science,2011,30(3). |
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| Authors: | SONG Tian-yu LIU Yan-hong YAO Yi |
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| Institution: | SONG Tian-yu~1,LIU Yan-hong~(1*),YAOYi~1 The Key Laboratory for Silviculture and Conservation of Ministry of Education,Beijing Forestry University Beijing,100083,china |
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| Abstract: | Davidia involucrate is a rare,endangered plant endemic to China,and is of important scientific significance in studying plant phylogeny and geological history.We explored the influence of soil nitrogen concentration and solar radiation on the growth of one-year-old seedlings of this species by measuring the photosynthesis parameters and growth parameters under different nitrogenxsolar radiation treatments.The results show that 1)high nitrogen concentration slowed down the decrease rate of net photosynthesis... |
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| Keywords: | Davidia Involucrate seedling soil nitrogen concentration solar radiation photosynthetic parameters |
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