【摘要】 【目的】研究藓类植物SPAD值与对应叶绿素含量的相互关系,为石漠化区域生态监测及生态修复提供数据支撑。【方法】对撒拉溪示范区常见2种藓类植物尖叶对齿藓(Didymodon constrictus)和穗枝赤齿藓(Erythrodontium julaceum)的叶绿素含量与SPAD值进行相关性分析。【结果】2种藓类植物SPAD值与叶绿素含量在4种函数(线性、对数、指数、乘幂)拟合下均显著相关,叶绿素a含量较叶绿素b含量的相关性更强;随石漠化程度的增强,2种藓类植物的SPAD值与叶绿素含量均呈明显下降趋势,即石漠化程度越高叶绿素含量越低,SPAD值也越低。【结论】SPAD值能理想地表征藓类植物叶绿素总含量,随石漠化程度的增加,藓类植物会通过降低叶绿素含量以及增加叶绿素a/b值以适应石漠化地区恶劣的生态环境。更多还原

【Abstract】 【Objective】The objective of the paper is to study the correlation between SPAD value and corresponding chlorophyll content of moss and to provide the data support for ecological monitoring and ecological remediation in rocky desertification areas. 【Method】The correlations between chlorophyll content and SPAD value of two common mosses(Didymodon constrictus and Erythrodontium julaceum) in Salaxi demonstration area are analyzed. 【Result】SPAD value was correlated with chlorophyll content of two mosses significantly under four function fitting(linear, logarithm, exponent and exponentiation). Chlorophyll a content was more correlated than chlorophyll b content. SPAD value and chlorophyll content of two mosses showed an obvious declining trend with increase of rocky desertification degree. That means, the higher the rocky desertification degree was, the lower the chlorophyll content and SPAD value were. 【Conclusion】SPAD value can represent total chlorophyll content of moss ideally. Moss can adapt to severe ecological environment in rocky desertification areas by decreasing chlorophyll content and increasing chlorophyll a/b value with increase of rocky desertification degree.更多还原