摘要
[目的]探讨复垦模式对土壤呼吸作用的影响,同时为矿区复垦土地质量评价、复垦模式的筛选提供数据支撑。[方法]采用动态密闭气室红外CO2分析法对露天煤矿复垦区5块永久性样地土壤呼吸作用及其相关组分的日变化及季节动态进行跟踪测定。[结果]各样地土壤呼吸作用均呈现出明显的季节变化规律,但日变化趋势却各不相同。土壤呼吸速率日变化在5,9,10月份变幅较为平缓,6,7,8月份变幅较大,且在7,8月份达到最大值。去根系后,土壤温度及水分与未处理之间没有显著差异,但土壤呼吸速率值明显下降,下降幅度为19%-46%。土壤总呼吸速率和去根系土壤呼吸速率均与土壤温度、土壤水分、双因子呈幂或指数函数关系。[结论]刺槐纯林模式更有利于土壤的熟化与肥力的提高。
[Objective]To explore the effects of reclamation mode on soil respiration in order to provide theoretical support for soil quality evaluation and reclamation mode selection in reclaimed region.[Methods]Using the analysis method of dynamic airtight chamber infrared CO2,the diurnal and seasonal variation of soil respiration rate and its related components in five permanent sample plots of opencast coal mine in Shanxi Province were studied.[Results]The soil respiration rate in each sample plot showed obvious seasonal variation,however,the law of diurnal variation of soil respiration rate was different.The width of diurnal variation of soil respiration rate in each sample plot was relatively gentle in May,September and October,and was bigger in June,July and August.The highest value of soil respiration appeared in July or August.Compared to the control,the root exclusion soil temperature and moisture was not significant difference,but the soil respiration rate was significantly declined by 19%-46%.The total and root exclusion soil respiration in relationship with soil temperature and moisture all can be described as a power function or exponential function,respectively.[Conclusion]Pure forest model of Robinia pseudoacacia is more advantageous to the improvement of the maturation and fertility of soil.
出处
《水土保持通报》
CSCD
2015年第3期55-61,共7页
Bulletin of Soil and Water Conservation
基金
"十二五"国家科技支撑计划课题"资源转型城市矿区生态修复关键技术与示范"(2012BAC10B04)
山西省科技重大专项项目"山西大型生态脆弱矿区土地复垦与生态重建技术研究与示范"(20121101007)
山西省青年基金项目"晋西北大型露天煤矿复垦区土壤呼吸与生态重建关系(2010021027-3)
关键词
土壤呼吸
去根系
生态因子
复垦区
soil respiration
root exclusion
environmental factor
reclaimed region
