植物生态学报 ›› 2010, Vol. 34 ›› Issue (1): 64-71.DOI: 10.3773/j.issn.1005-264x.2010.01.010
所属专题: 生态化学计量
刘兴诏1,2, 周国逸1, 张德强1, 刘世忠1, 褚国伟1, 闫俊华1,*()
收稿日期:
2008-10-13
接受日期:
2009-02-17
出版日期:
2010-10-13
发布日期:
2010-01-01
通讯作者:
闫俊华
作者简介:
* E-mail: jhyan@scib.ac.cnLIU Xing-Zhao1,2, ZHOU Guo-Yi1, ZHANG De-Qiang1, LIU Shi-Zhong1, CHU Guo-Wei1, YAN Jun-Hua1,*()
Received:
2008-10-13
Accepted:
2009-02-17
Online:
2010-10-13
Published:
2010-01-01
Contact:
YAN Jun-Hua
摘要:
选择南亚热带森林演替过程3个阶段(初期、中期和后期)的典型森林生态系统为研究对象, 在测定植物与土壤中全N、全P含量的基础上, 阐明了森林演替过程中植物与土壤的N、P化学计量特征。结果显示: 1)土壤中全N含量随演替进行而增加, 马尾松(Pinus massoniana)林(初期)、混交林(中期)和季风林(后期) 0-10 cm土层中全N含量分别为0.440、0.843和1.023 g·kg-1; 混交林0-10 cm土层中全P的含量最为丰富, 为0.337 g·kg-1, 马尾松林和季风林土壤全P含量分别为0.190和0.283 g·kg-1。2)植物叶片中全N、全P的含量随演替呈减少的趋势, 但根系中全N、全P的含量都以马尾松林为最多, 混交林和季风林含量彼此相当。3)各土层中N:P随演替的进行呈现明显增加趋势, 马尾松林、混交林和季风林0-10 cm土层中N:P分别为2.3、2.5和3.6; 植物各器官中N:P随演替的进行也呈增加趋势, 且叶片和根系中的N:P相近, 马尾松林、混交林和季风林叶片中N:P分别为22.7、25.3和29.6。基于上述结果, 探讨了南亚热带森林生态系统植物与土壤中N:P特征、森林演替过程中植物与土壤中N:P变化规律以及P对南亚热带森林生态系统的限制作用。结果表明, P已经成为南亚热带森林生态系统生物生长和重要生态过程的限制因子。
刘兴诏, 周国逸, 张德强, 刘世忠, 褚国伟, 闫俊华. 南亚热带森林不同演替阶段植物与土壤中N、P的化学计量特征. 植物生态学报, 2010, 34(1): 64-71. DOI: 10.3773/j.issn.1005-264x.2010.01.010
LIU Xing-Zhao, ZHOU Guo-Yi, ZHANG De-Qiang, LIU Shi-Zhong, CHU Guo-Wei, YAN Jun-Hua. N and P stoichiometry of plant and soil in lower subtropical forest successional series in southern China. Chinese Journal of Plant Ecology, 2010, 34(1): 64-71. DOI: 10.3773/j.issn.1005-264x.2010.01.010
图1 鼎湖山3种不同演替阶段森林土壤的氮磷含量。误差线代表标准误(SE); 同一土层具有不同字母的表示差异显著 (p < 0.05)。图中氮、磷值为2005年数据。MEBF, 季风常绿阔叶林; MF, 混交林; PF, 马尾松林。
Fig. 1 Soil total nitrogen and phosphorus concentrations among three forest types at different succession stages in Dinghushan. Different letters indicate significant differences at the confidence level of p < 0.05 in the same soil layer among the three forests. Data source: 2005. MEBF, monsoon evergreen broad-leaved forest; MF, mixed forest; PF, pine forest.
图2 鼎湖山3种不同演替阶段植被的N、P含量。季风林数据时间范围是1992-2005年; 混交林为2001-2006年; 马尾松林为1992-2006年。同一部分具有不同字母的表示差异显著(p < 0.05)。MEBF、MF、PF, 同图1。
Fig. 2 Plant total nitrogen and phosphorus concentrations among three types of forests at different succession stages in Dinghushan. Data source: MEBF, from 1992 to 2005; MF, from 2001 to 2006; PF, from 1992 to 2006. Different letters indicate significant differences at the confidence level of p<0.05 in the same plant parts among the three forests; MEBF, MF, PF, see Fig. 1.
共有种 Common species1) | 叶 Leaf | 根 Root | |||||
---|---|---|---|---|---|---|---|
N | P | N:P | N | P | N:P | ||
马尾松 Pinus massoniana | 0.179 | 0.001** | 0** | 0.793 | 0** | 0** | |
荷木 Schima superba | 0** | 0.064 | 0** | 0.092 | 0.043* | 0.101 | |
锥栗 Castanopsis chinensis | 0.621 | 0.230 | 0.27 | 0.020* | 0** | 0.001** |
表1 不同演替阶段相同物种的N、P含量差异分析
Table 1 Differences between the common species at different succession stages
共有种 Common species1) | 叶 Leaf | 根 Root | |||||
---|---|---|---|---|---|---|---|
N | P | N:P | N | P | N:P | ||
马尾松 Pinus massoniana | 0.179 | 0.001** | 0** | 0.793 | 0** | 0** | |
荷木 Schima superba | 0** | 0.064 | 0** | 0.092 | 0.043* | 0.101 | |
锥栗 Castanopsis chinensis | 0.621 | 0.230 | 0.27 | 0.020* | 0** | 0.001** |
图4 鼎湖山3种林型植物的N:P。同一部分具有不同字母的表示差异显著(p < 0.05)。MEBF、MF、PF, 同图1。
Fig. 4 N:P ratio in the plant of three types of forests in Dinghushan. Different letters indicate significant differences at the confidence level of p < 0.05 in the same plant parts among the three forests. MEBF, MF, PF, see Fig. 1.
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