植物生态学报 ›› 2007, Vol. 31 ›› Issue (6): 1168-1173.DOI: 10.17521/cjpe.2007.0145
所属专题: 稳定同位素生态学
刘学炎1,2, 肖化云1,*(), 刘丛强1, 李友谊1,2
收稿日期:
2007-01-10
接受日期:
2007-03-17
出版日期:
2007-01-10
发布日期:
2007-11-30
通讯作者:
肖化云
作者简介:
* E-mail: xiaohuayun@vip.skleg.cn基金资助:
LIU Xue-Yan1,2, XIAO Hua-Yun1,*(), LIU Cong-Qiang1, LI You-Yi1,2
Received:
2007-01-10
Accepted:
2007-03-17
Online:
2007-01-10
Published:
2007-11-30
Contact:
XIAO Hua-Yun
摘要:
对细叶小羽藓(Haplocladium microphyllum)新老组织及其根际土壤的碳氮含量和同位素组成进行了分析,探讨了苔藓衰老过程控制元素和同位素变化的机制以及苔藓对土壤的贡献。同种组织碳氮含量之间的相关性反映了苔藓固碳能力和氮需求的相互联系。新生组织碳氮含量明显高于衰老组织且存在相关性,反映了苔藓衰老过程体内碳氮物质向新生组织迁移的生理特征。两种组织之间同位素组成(δ13C和δ15N)没有明显差异,说明组织间的物质迁移没有产生明显的同位素分馏,其原因可能在于细叶小羽藓形态结构简单,体内物质迁移对碳氮同位素组成的影响较小。相反,苔藓组织与根际土壤之间的有机碳/氮信息没有相关性,这可能与苔藓植物长期滞留营养物质、缓慢的分解和成土速度有关,反映了该研究区苔藓层对土壤碳氮累积的贡献较小。
刘学炎, 肖化云, 刘丛强, 李友谊. 苔藓新老组织及其根际土壤的碳氮元素含量和同位素组成(δ13C和δ15N)对比. 植物生态学报, 2007, 31(6): 1168-1173. DOI: 10.17521/cjpe.2007.0145
LIU Xue-Yan, XIAO Hua-Yun, LIU Cong-Qiang, LI You-Yi. CONTENTS AND ISOTOPIC COMPOSITION OF C AND N IN MOSS (HAPLOCLADIUM MICROPHYLLUM) TISSUES AND SOIL RHIZOSPHERE. Chinese Journal of Plant Ecology, 2007, 31(6): 1168-1173. DOI: 10.17521/cjpe.2007.0145
样品 Sample No. | 碳含量 Carbon content (%) | 氮含量 Nitrogen content (%) | |||||||
---|---|---|---|---|---|---|---|---|---|
新生组织 New tissue | 衰老组织 Senescent tissue | 根际土壤 Rhizosphere soil | 新生组织 New tissue | 衰老组织 Senescent tissue | 根际土壤 Soil rhizosphere | ||||
T1 | 41.4 | 39.2 | 5.8 | 2.25 | 1.79 | 0.36 | |||
T2 | 42.0 | 40.1 | 4.9 | 2.31 | 1.91 | 0.31 | |||
T3 | 40.5 | 38.8 | 6.6 | 2.2 | 1.74 | 0.46 | |||
T4 | 41.7 | 38.0 | 6.6 | 2.24 | 1.73 | 0.34 | |||
T5 | 42.3 | 41.6 | 6.0 | 2.35 | 2.04 | 0.36 | |||
T6 | 41.9 | 40.9 | 5.6 | 2.33 | 1.91 | 0.33 | |||
平均值 Average | 41.6±0.6 | 39.8±1.4 | 5.9±0.6 | 2.28±0.06 | 1.85±0.12 | 0.36±0.05 |
表1 苔藓新老组织及其根际土壤碳氮含量分析结果
Table 1 Carbon and nitrogen content of Haplocladium microphyllum tissues and its rooting soil
样品 Sample No. | 碳含量 Carbon content (%) | 氮含量 Nitrogen content (%) | |||||||
---|---|---|---|---|---|---|---|---|---|
新生组织 New tissue | 衰老组织 Senescent tissue | 根际土壤 Rhizosphere soil | 新生组织 New tissue | 衰老组织 Senescent tissue | 根际土壤 Soil rhizosphere | ||||
T1 | 41.4 | 39.2 | 5.8 | 2.25 | 1.79 | 0.36 | |||
T2 | 42.0 | 40.1 | 4.9 | 2.31 | 1.91 | 0.31 | |||
T3 | 40.5 | 38.8 | 6.6 | 2.2 | 1.74 | 0.46 | |||
T4 | 41.7 | 38.0 | 6.6 | 2.24 | 1.73 | 0.34 | |||
T5 | 42.3 | 41.6 | 6.0 | 2.35 | 2.04 | 0.36 | |||
T6 | 41.9 | 40.9 | 5.6 | 2.33 | 1.91 | 0.33 | |||
平均值 Average | 41.6±0.6 | 39.8±1.4 | 5.9±0.6 | 2.28±0.06 | 1.85±0.12 | 0.36±0.05 |
图1 细叶小羽藓新生组织(p<0.05)和老组织(p<0.01)碳含量和氮含量之间的相关性
Fig.1 Carbon content plotted against nitrogen content in new tissues (p<0.05) and (p<0.01) senescent tissues ofHaplocladium microphyllum
图2 细叶小羽藓新老组织之间碳含量(p<0.05)和氮含量(p<0.01)的相关性
Fig.2 Carbon (p<0.05) and nitrogen (p<0.01) content in senescent tissues ofHaplocladium microphyllum plotted against those in new-growing tissues
样品 Sample No. | δ13C值 δ13C value (‰) | δ15N 值δ15N value (‰) | ||||
---|---|---|---|---|---|---|
新生组织 New tissue | 衰老组织 Senescent tissue | 根际土壤 Soil rhizosphere | 新生组织 New tissue | 衰老组织 Senescent tissue | 根际土壤 Soil rhizosphere | |
T1 | -29.0 | -29.2 | -25.0 | -7.2 | -7.3 | 1.8 |
T2 | -29.4 | -29.4 | -24.9 | -7.6 | -7.0 | 0.6 |
T3 | -29.1 | -29.3 | -25.7 | -7.4 | -9.4 | 2.5 |
T4 | -31.3 | -30.9 | -24.8 | -5.5 | -5.3 | 3.8 |
T5 | -31.4 | -31.3 | -24.8 | -6.4 | -6.4 | 0.3 |
T6 | -30.8 | -30.2 | -24.8 | -5.0 | -5.5 | 1.7 |
平均值 Average | -30.2±1.1 | -30.1±0.9 | -25.0±0.4 | -6.5±1.1 | -6.8±1.5 | 1.8±1.3 |
表2 苔藓新老组织及其根际土壤碳氮同位素分析结果
Table 2 Stable carbon and nitrogen isotope composition of Haplocladium microphyllum tissues and its rooting soil
样品 Sample No. | δ13C值 δ13C value (‰) | δ15N 值δ15N value (‰) | ||||
---|---|---|---|---|---|---|
新生组织 New tissue | 衰老组织 Senescent tissue | 根际土壤 Soil rhizosphere | 新生组织 New tissue | 衰老组织 Senescent tissue | 根际土壤 Soil rhizosphere | |
T1 | -29.0 | -29.2 | -25.0 | -7.2 | -7.3 | 1.8 |
T2 | -29.4 | -29.4 | -24.9 | -7.6 | -7.0 | 0.6 |
T3 | -29.1 | -29.3 | -25.7 | -7.4 | -9.4 | 2.5 |
T4 | -31.3 | -30.9 | -24.8 | -5.5 | -5.3 | 3.8 |
T5 | -31.4 | -31.3 | -24.8 | -6.4 | -6.4 | 0.3 |
T6 | -30.8 | -30.2 | -24.8 | -5.0 | -5.5 | 1.7 |
平均值 Average | -30.2±1.1 | -30.1±0.9 | -25.0±0.4 | -6.5±1.1 | -6.8±1.5 | 1.8±1.3 |
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