欢迎访问林草资源研究

林业资源管理 ›› 2010›› Issue (2): 89-93.

• 科学技术 • 上一篇    下一篇

氮磷对牛蹄豆幼苗生长及光合特性的影响

李冬生1,2, 陈进2, 冯秋红2, 史作民2   

  1. 1.国家林业局调查规划设计院,北京 100714;
    2.中国林业科学研究院森林生态环境与保护研究所 国家林业局森林生态环境重点实验室,北京 100091
  • 收稿日期:2010-03-15 修回日期:2010-03-30 发布日期:2020-12-14
  • 通讯作者: 史作民(1968-),男,山东郓城人,研究员,博士,主要研究方向:恢复生态、林业与气候变化。
  • 作者简介:李冬生(1972-),男,山东菏泽人,在读研究生,主要研究方向为:林业经济、生态评估。
  • 基金资助:
    国家林业局引进项目“干热河谷区植被恢复种质材料及配套技术引进”(2006-4-05)

Effects of Nitrogen and Phosphorus on Growth and Photosynthesis of Pithecellobium dulce Seedlings

LI Dongsheng1, CHEN Jin2, FENG Qiuhong2, SHI Zuomin2   

  1. 1. Academy of Forest Inventory and Planning, State Forestry Administration, Beijing 100714, China;
    2. Institute of Forest Ecology, Environment and Protection, Chinese Academy of Forestry, Key Laboratory of Forest Ecology and Environmental Sciences of State Forestry Administration, Beijing 100091, China
  • Received:2010-03-15 Revised:2010-03-30 Published:2020-12-14

摘要: 对引进树种牛蹄豆幼苗生长和光合特征中的氮磷响应进行了研究。结果表明牛蹄豆对氮磷的适应性均较强,即随供氮量的增加,牛蹄豆的根冠比、根生物量比显著降低;在较大的氮范围内,牛蹄豆的总生物量都随供氮量的增加而显著增加,超过0.1g/kg土则显著下降;随供磷量的增加,牛蹄豆的根冠比、根生物量比降低,总生物量显著增加;无论在供氮量增加还是在供磷量增加的情况下,牛蹄豆的比叶面积增加,株高、叶氮、叶磷、净光合速率显著增加。

关键词: 牛蹄豆, 氮, 磷, 生物量, 光合特性

Abstract: Effects of nitrogen and phosphorus on growth and photosynthesis of Pithecellobium dulce (an introduced species) seedlings were studied.The results showed that P.dulce was able to acclimate to a wide range of nitrogen and phosphorus environment.With an increase in nitrogen level,the ratio of root mass to total mass and root mass to overground mass of the seedlings significantly decreased.Under a wide range of nitrogen level,their total biomass significantly increased,but decreased significantly at over 0.1g·kg-1soil nitrogen level.With an increase in phosphorus level,the ratio of root mass to total mass and root mass to overground mass of the seedlings decreased,but the total biomass significantly increased.No matter with an increase in nitrogen level or with an increase in phosphorus level,the specific leaf area (SLA) of the seedlings increased and their height,leaf nitrogen content,leaf phosphorus content,net photosynthetic rate also significantly increased.

Key words: Pithecellobium dulce, nitrogen,phosphorus, growth characteristics, photosynthesis

中图分类号: