摘要
泥炭藓泥炭沼泽多分布于冷湿的寒温带地区;亚热带亚高山地区降水充足,气温相对较低,部分山间洼地也发育有泥炭藓泥炭沼泽,分布在亚热带的泥炭藓泥炭沼泽更为珍稀。2018年4月至2019年5月,对湖北省恩施市太山庙林场泥炭藓泥炭沼泽进行了野外调查,调查结果显示,该区域有22处泥炭藓泥炭沼泽,其泥炭层厚50~110 cm,呈斑块状分布在地势低洼处,总面积为39.59 hm^2;在泥炭藓泥炭沼泽中,全年水位在-17.65^-0.34 cm之间波动;在泥炭藓泥炭沼泽中,0~50 cm深度土壤的pH为3.92~4.30,土壤的酸性较强。随着土壤深度的增加,土壤pH和容重增大,土壤含水量、有机碳含量、可溶性有机碳含量、全氮含量和碱解氮含量在减小;0~50 cm深度土壤的有机碳质量比为246.51~283.30 g/kg,可溶性有机碳质量浓度为33.97~77.64 mg/L,全氮质量比为8.19~12.71 g/kg,碱解氮质量比为436.22~741.35 mg/kg;在泥炭藓泥炭沼泽中,共有植物33科42属52种;优势植物主要为杜鹃花科、蔷薇科、禾本科、莎草科的植物;灌木层、草本植物层和苔藓层的植物盖度分别为(75±16)%、(46±18)%和(92±8)%;植物地上总生物量为1.83 kg/m^2,灌木层、草本植物层和苔藓层的植物地上生物量分别为(0.42±0.13) kg/m^2、(0.032±0.015) kg/m^2和(1.38±0.42) kg/m^2。
As a special and rare wetland resource, sphagnum bog is mostly distributed in cold and humid cold temperate regions. Subtropical subalpine areas have sufficient precipitation and relatively low temperature,and some low lands have become potential development areas of sphagnum bog, and sphagnum bog in subtropical areas is more rare, and of higher protection value. From April 2018 to May 2019, the field surveys were carried out in Taishanmiao forest farm in Enshi city, Hubei province, the research found that sphagnum peat bogs were well developed. In the study area, the sphagnum peat bogs are distributed in patches with a total area of 39.59 ha, and the thickness of peat layer was 50-110 cm. The water levels in the bogs were relatively stable, fluctuating between-17.65 cm to-0.34 cm all year round. Soil is acidic and the pH is from3.92 to 4.30. Soil pH and bulk density increased with the depth increase of the soil layer. The organic carbon contents in the soils at depth of 0-50 cm reached 246.51 g/kg to 283.30 g/kg, and the contents of dissolved organic carbon contents, total nitrogen and alkeline-nitrogen in the soils at depth of 0-50 cm decreased with the depth increase of the soil layers. There were 52 plant species belonging to 42 genera 33 families, the species of Ericaceae, Rosaceae, Gramineae and Cyperaceae were dominant species in the bogs in Taishanmiao forest farm. Vegetation coverages of bush, herbaceous and moss layers in the bogs were(75 ±16)%,(46±18)% and(92±8)%;and the total biomass of aboveground vegetation was 1.83 kg/m^2, those of the bush herbaceous and moss layers were 0.42 kg/m^2, 0.032 kg/m^2 and 1.38 kg/m^2, respectively.
作者
王涵
吴林
薛丹
刘雪飞
洪柳
牟利
李小玲
WANG Han;WU Lin;XUE Dan;LIU Xuefei;HONG Liu;MOU Li;LI Xiaoling(Biological Resources Protection and Utilization of the Key Laboratory of Hubei Province,Enshi 445000,Hubei,P.R.China;Hubei Minzu University,School of Forestry and Horticulture,Enshi 445000,Hubei,P.R.China;Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization,Ecological Restoration and Biodiversity Conservation Key Laboratory of Sichuan Province,Chengdu Institute of Biology,Chinese Academy of Sciences,Chendu 610041,Sichuan,P.R.China)
出处
《湿地科学》
CSCD
北大核心
2020年第3期266-274,共9页
Wetland Science
基金
国家自然科学基金项目(41867042)
湖北省“双一流”建设专项资金项目(2019)
中国科学院山地生态恢复与生物资源利用重点实验室开放课题(Kxysws1904)资助。
关键词
泥炭藓泥炭沼泽
空间分布
水位
土壤理化性质
植被特征
sphagnum peat bog
spatial distribution
water level
soil physical and chemical properties
vegetation characteristics
