摘要
为探究矿区煤矸石充填复垦土壤内部C、S等物质缓慢氧化产生的二氧化碳及热量对表土植物的影响,应用实验室模拟试验,分析复垦土壤底部加热与通CO2气体对薄荷生长特征与根系呼吸的影响。试验底部加热温度分别设置为20℃、40℃、60℃,通气通量分别为1L/min、2L/min和3L/min,各梯度通气时间设置5min、10min。结果表明:不同程度通气对薄荷生理特征和根系呼吸的影响不同。底部通气5min/d时,随着通气浓度的增大,薄荷地上、地下生物量以及根系呼吸速率均呈上升趋势,叶面积指数呈先增后减趋势;底部通气10min/d时,叶面积指数呈下降趋势,地上、地下生物量以及根系呼吸速率均呈先增后减趋势。综合对比通气10min/d与5min/d,根系生物量与根系呼吸速率均有下降,下降率分别为17%、8%,叶面积指数与地上生物量略有增加,增长率分别为1%、9%;随着煤矸石底部加热温度由20℃升高至40℃,再升高至60℃的过程中,薄荷的叶面积指数、地上与地下生物量以及根系呼吸速率均表现出先上升后下降的趋势,在40℃时达到最大值。
In order to explore the effects of carbon dioxide and heat produced by slow oxidation of C, S and other substances in coal gangue reclaimed soil on topsoil plants in mining area, the effects of heating and CO 2 filling at the bottom of soil on the physiological and biochemical characteristics of mints and its root respiration were analyzed using simulation tests. The heating temperatures at the bottom of the test were set at 20℃, 40℃, and 60℃, respectively;the gas supply gradients were set at 1L/min, 2L/min and 3L/min, and each gradient inflatable time were set at 5minutes and 10minutes. The results showed that different degrees of aeration had different effects on Mint physiological characteristics and its root respiration rate. When aerated for 5min/d, the above-ground and underground biomass and root respiration rate increased with the increase of aeration concentration, and the leaf area index increased firstly and then decreased;when aerated for 10min/d, the leaf area index decreased, and the above-ground and underground biomass and root respiration rate increased firstly and then decreased. Compared with 10min/d and 5min/d of ventilation, root biomass and root respiration rate decreased by 17% and 8%, respectively. Leaf area index and aboveground biomass increased slightly by 1% and 9%, respectively. During the process of heating at the bottom of the gangue with temperature rising from 20℃ to 60℃,the leaf area index, aboveground and underground biomass and root respiration rate of mint increased firstly and then decreased, and reached their maximum values at 40°C.
作者
陈孝杨
胡智勇
邢雅珍
张凌霄
年世宇
CHEN Xiaoyang;HU Zhiyong;XING Yazhen;ZHANG Lingxiao;NIAN Shiyu(School of Earth and Environment,Anhui University of Science and Technology,Huainan Anhui 232001,China)
出处
《安徽理工大学学报（自然科学版）》
CAS
2019年第5期1-6,共6页
Journal of Anhui University of Science and Technology:Natural Science
基金
国家自然科学基金资助项目(41572333)
关键词
土壤温度
CO2浓度
叶面积指数
生物量
根系呼吸
soil temperature
CO 2 concentration
leaf area index
biomass
root respiration
