| 红树植物叶片衰老过程中养分的内吸收 |
| |
| 引用本文： | 吴世军,王赟博,王文卿.红树植物叶片衰老过程中养分的内吸收[J].泉州师范学院学报,2012,30(6):47-52. |
| |
| 作者姓名： | 吴世军 王赟博 王文卿 |
| |
| 作者单位： | 1. 泉州师范学院湿地研究所,福建泉州,362000
2. 厦门大学环境与生态学院,福建厦门,361012 |
| |
| 基金项目： | 国家林业科技支撑计划专题 |
| |
| 摘 要： | 研究了23种红树植物（15种真红树植物,8种半红树植物）叶片衰老过程中氮（N）、磷（P）内吸收率.结果表明：（1）真红树植物与半红树植物相比,其叶片营养元素含量相对较低（Nmass=17.3mg/g;Pmass=1.4mg/g）,N、P含量随叶片衰老而减少;（2）大部分红树植物叶片氮磷比小于31,说明红树植物存在氮限制;（3）真红树植物氮内吸收率平均为63.6%,远高于半红树植物（52.2%）以及一般常绿植物（47.0%）,但真红树植物磷内吸收（53.4%）和半红树植物（49.4%）不存在显著的差异.因此,真红树植物拥有更高的氮保存能力,使其更适应于在缺氮环境下生存.
|
| 关 键 词： | 内吸收 养分 红树植物 |
Study on the Nutrients Retranslocation of Mangroves During Leaf Senescence |
| |
| WU Shi-jun,WANG Bin-bo,WANG Wen-qing.Study on the Nutrients Retranslocation of Mangroves During Leaf Senescence[J].Journal of Quanzhou Normal College,2012,30(6):47-52. |
| |
| Authors: | WU Shi-jun WANG Bin-bo WANG Wen-qing |
| |
| Institution: | 1.Wetland Institute,Quanzhou Normal University,Fujian 362000,China; 2.College of Environment and Ecology,Xiamen University,Fujian 361012,China) |
| |
| Abstract: | In this paper, nitrogen （N） and phosphorus （P） retranslocation during leaf senescence in 23 mangrove species （15 specific true-mangroves, 8 specific semi-mangroves）are studied. The results are as follows. （1）In contrast to semi-mangroves leaves, mature leaves of true-mangroves are relatively low nutrient （N and P） concentration expressed on a dry mass basis （Nmass and Pmass mg/g）,with 17.3 mg/g for N and 1.4 mg/g for P respectively. N and P concentrations decrease with leaf senescence. （2） Leaf N/P ratios are in most instances ~31, suggesting N limitation. （3）N retransloeation efficiency （NRE） is average 63. 6 % in true-mangroves, which is greater than that in semi-mangroves （52. 2 %） or the general evergreen trees （47. 0%）. But there are no significant differences of P retransloeation efficiency （PRE） between true-mangroves （53. 4%） and semi-mangroves （49.4%）. This suggests that true-mangroves reliably have a high capability in nitrogen-conservation for some factors. And true-mangroves are physiologically adapted to live in lower N-supply environments. |
| |
| Keywords: | retranslocation nutrients mangroves |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
|
