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黑河中游湿地植物区系及土壤有机碳分布特征

发表时间:2013-03-15  浏览量:969  下载量:441
全部作者: 赵锐锋,张丽华,赵海莉,姜朋辉
作者单位: 西北师范大学地理与环境科学学院;中国科学院寒区旱区环境与工程研究所皋兰生态与农业综合试验站
摘 要: 运用植物学、土壤学方法,结合野外实地调查、取样,对黑河中游湿地植物区系、生态特征和土壤有机碳(soil organic carbon,SOC)在不同植被类型的分布特征进行分析研究。结果表明:调查的黑河中游湿地共有84种植物,隶属于32科70属。其中,菊科、禾本科的种类最多,占所有植物种类的29.77%. 植物区系地理成分以温带分布型为主,多年生草本为植物的主要生活型。高草、低草、木本植被类型的SOC含量依次降低,在0~20 cm土层的差异达到显著水平(P<0.05)。SOC的空间变异以低草植被类型最大,木本植被居中,高草植被最小。高草、低草和木本植被0~40 cm SOC密度分别为7.33,5.44,4.25 kg/m2. 高草、低草植被0~10 cm土层SOC含量更高,分别占0~40 cm总量的32%和31%. 木本植被以10~20 cm最高,占0~40 cm总量的33%.
关 键 词: 植物学;干旱区湿地;植物区系;土壤有机碳;碳密度;黑河
Title: Flora components and distribution of soil organic carbon of the wetlands in the middle reaches of the Heihe river
Author: ZHAO Ruifeng, ZHANG Lihua, ZHAO Haili, JIANG Penghui
Organization: College of Geography and Environment Science, Northwest Normal University; Gaolan Experiment Station for Ecology and Agriculture Research, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences
Abstract: The flora components, ecological characteristics and distribution of soil organic carbon (SOC) at different vegetation types in the wetland of the middle reaches of the Heihe river were studied using botany and pedology methods together with field investigation and sampling. The results showed that there were 84 plant species in the wetland of the middle reaches of the Heihe river, which belonged to 32 families and 70 genera. The species of compositae and gramineae were dominant, occupying 29.77% of the total species. Most of geographic elements of the flora embodied the feature of temperate zone. The perennial herbs were the main part of wetland plants. The content of SOC at was in the order of high herb wetland vegetation>lower herb wetland vegetation>woody wetland vegetation, and the difference was significant at 0-20 cm soil depth (P<0.05). The coefficient of variation of SOC was greateast at the lower herb wetland vegetation, middle at woody wetland vegetation and smallest at high herb wetland vegetation. The soil carbon density at 0-40 cm depth was 7.33, 5.44, 4.25 kg/m2 at high herb wetland vegetation, lower herb wetland vegetation and woody wetland vegetation, respectively. At the high herb and lower herb wetland vegetation, the SOC contents were more concentrated at the 0-10 cm depth, which accounted for 32% and 31% of the total at 0-40 cm depth. While the SOC content was larger at the soil depth of 10-20 cm (accounting for 33%) at the woody wetland vegetation.
Key words: botany; wetlands in the arid region; flora components; soil organic carbon; carbon density; Heihe river
发表期数: 2013年3月第5期
引用格式: 赵锐锋,张丽华,赵海莉,等. 黑河中游湿地植物区系及土壤有机碳分布特征[J]. 中国科技论文在线精品论文,2013,6(5):462-467.
 
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