摘要
文章研究博斯腾湖流域湿地芦苇叶片在不同盐度水环境下的固碳释氧和增湿降温能力,以阐明博斯腾湖流域湿地不同矿化度水环境下芦苇叶片固碳释氧和增湿降温的变化规律。通过在博斯腾湖湖滨湿地设置半控制实验,设置5组盐水处理,分别为C1(1.4 g/L)、C2(6.4 g/L)、C3(11.4 g/L)、C4(16.4 g/L)、C5(21.4 g/L),测定芦苇叶片在各处理下的光合参数,并计算不同盐度下芦苇叶片的固碳释氧量和增湿降温量。结果表明:(1)芦苇叶片日固碳释氧量与净光合速率日均值的变化规律一致,各梯度盐处理下差异显著,C2的芦苇叶片净光合速率和固碳释氧量最大,其次由大到小依次为C1、C3、C4、C5;(2)不同梯度盐处理下芦苇日增湿降温量与蒸腾速率日均值的变化趋势一致,且达到显著水平,芦苇叶片蒸腾速率和增湿降温量由大到小依次为C2、C1、C4、C3、C5;(3)多元回归分析表明,在所有梯度盐处理下,气孔导度(G_s)都是影响芦苇叶片光合和蒸腾的最主要因素,且G_s在矿化度6.4 g/L处理下达到最大值。博斯腾湖流域湿地芦苇在矿化度为6.4 g/L时固碳释氧和增湿降温能力最强。
The ability of reed in Boston Lake wetland on carbon fixation, oxygen release and humidification, cooling under different salinity was studied, to clarify the change rules of carbon fixation and oxygen release, humidification and cooling ability of reed under different salinity, which would find some new rules to provide more precise theoretical basis for the artificial cultivation in the wetland. The photosynthetic parameters of reed irrigated with salt water of 1.4 g/L（C1）, 6.4 g/L（C2）,11.4 g/L（C3）, 16.4 g/L（C4） and 21.4 g/L（C5） respectively, which were five different semi-controlled experimental treatments, were measured. And the daily amount of carbon fixation and oxygen release, humidification and cooling by the measured photosynthetic parameters were calculated, to find the differences of reed under different salinity about the net photosynthetic rate and transpiration rate. Results indicated that the daily amount of carbon fixation and oxygen release reaches the maximum at 6.4 g/L salinity, then followed by C1, C3, C4, C5. The daily amount of humidification and cooling also reaches the maximum at 6.4 g/L salinity, then followed by C2, C1, C4, C3, C5. Multiple regression analysis showed that G_s is the most important factor affecting photosynthesis and transpiration of reed leaves under all gradient treatments. Therefore the effect of carbon fixation and oxygen release, humidification and cooling on the photosynthesis and transpiration of reed is the best under 6.4 g/L salinity from the perspective of stomata.
作者
马霄华
韩炜
管文轲
党亚玲
费兵强
MA Xiaohua;HAN Wei;GUAN Wenke;DANG Yaling;FEI Bingqiang(School of Geographic Science and Tourism.Xinjiang Normal University,Urumqi 830054,China;Key Laboratory of Arid Area of Lake Environment and Natural Resources of Xinjiang,Urumqi 830054,China;Xinjiang Academy of Forestry Science,Urumqi 830054,China)
出处
《环境科学与技术》
CAS
CSCD
北大核心
2018年第8期11-16,125,共7页
Environmental Science & Technology
基金
新疆干旱区湖泊环境与资源重点实验室开放基金(XJDX0909-2012-07)
新疆师范大学"十三五"校级重点学科地理学招标课题资助(17SDKD0704)
新疆维吾尔自治区科技支撑专项:塔里木河中下游胡杨生态修复研究与示范(HY-2.3)
教育部人文社会科学研究项目青年基金(14XJJCZH003)
关键词
芦苇
博斯腾湖湿地
固碳释氧
增湿降温
reeds
Boston Lake wetlands
carbon fixation and oxygen release
humidification and cooling
