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Effects of grassland degradation on chestnut soil properties in bashang plateau, China

Journal of Environmental Sciences 2000年第1期12卷 105-109页

作者： SHENG Xue bin\+1, LIU Yun\|xia\+1, ZHAO Yu\|ping\+2 (1. Research Center for Eco\|Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China 2. China University of Agriculture, Beijing 100094, China)

The repeated effects of vulnerable habitat and unreasonable human activities on the bashang plateau of China led the chestnut soil to degrade. It expresses in reducing soil CEC, decreasing nutrient content, decomposing organic complexes, and reducing humus in loose, steady and tight bond forms, respectively. The percentage of three forms are 21%—34%, 44%—55% and 5%—6.2%, respectively.

关键词： bashang plateau chestnut soil organic and inorganic complexes humus bond form CLC number: S152.4 Document code: A

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Temporal and Spatial Evolution of Lakes in the bashang plateau for Nearly Recent 30 Years

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Journal of Water Resource and Protection 2022年第10期14卷 698-708页

作者： Xiujuan Li Sugai Gao Wenli Li Guifu Qiu Zhiyuan Tian Department of Resources and Environmental Engineering Shandong Agriculture and Engineering University Jinan China Beijing Yanqing District No.1 Middle School Beijing China Zhangjiakou Saibei Forestry Centre Zhangjiakou China Kangbao County Natural Resources and Planning Bureau Zhangjiakou China

Lakes are important ecological water sources in the bashang plateau. Its expansion or shrinkage directly affects the ecological security of the plateau and its surrounding areas. In this study, Landsat images from 1984 to 2015 were selected to monitor the area of lakes in the bashang plateau and to analyze the spatiotemporal evolution and driving forces of lakes in the bashang plateau. The results showed that there were 47 lakes in the bashang plateau in 2015, with a total area of 37.63 km2, mainly distributed in the central and western regions of the region. From 1984 to 2015, the lakes in bashang plateau showed a shrinking trend. At the same time, there are obvious stage differences in lake changes. During 1984-1996, the number of lakes increased by 99 and the total area increased by 124.43 km2. From 1996 to 2015, the number of lakes decreased by 142, and the total area decreased by 183.96 km2. Before 1996, climate change was the dominant factor. However, the shrinkage of lakes after 1996 is the result of climate change and human activities. Among them, the large-scale planting of water consuming crops such as vegetables is the main human activity mode leading to lake shrinkage. This study will help to understand the expansion and contraction factors of the bashang plateau lakes in Hebei province and provide a reference for the future protection and management of the lakes.

关键词： bashang plateau Lake Area Spatial and Temporal Patterns Evolution Driving Force

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Study on Pollen Morphology of Nine Major Crops in bashang plateau of Hebei Province

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Agricultural Science & Technology 2013年第6期14卷 838-841,885页

作者：张茹春阳小兰蒋红军王瑞君河北省科学院地理科学研究所河北石家庄050011

[Objective] This study aimed to investigate the pollen morphology of nine major crops in bashang plateau of Hebei Province. [Method] By using an optical microscope, pollen morphology of nine major crops in bashang plateau of Hebei Province was observed and compared. [Result] Pollen grains were spherical, nearly spherical or prolate; pollen grains of Cucurbita pepo were the largest, and those of Brassica campestris were the smallest; P/E value of Vicia faba was the maximum of 1.77, and that of Avena chinsis was the minimum of 1.00; there were six types of germinal apertures, including single-aperture, scattered-aperture, 3-aperture, 3-groove, 3-colporate and 3-4-colporate; there were four types of exine ornamentation, including reticulate ornamentation, warty ornamentation, spinulose ornamentation and granular ornamentation. [Conclusion] This study not only provided standard maps and related information for the identification of crop pollens in different strata, but also provided modern palynological evidence for extracting information of synarthropic plants （cultivated crops mostly） in different strata, deducing the natural environment ancient human lived in, and understanding the relationship between human and environmental changes.

关键词： Pollen morphology Crops bashang plateau

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河北藓类植物的新记录与新分布(英文)

河北藓类植物的新记录与新分布(英文)

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作者：李琳王晓蕊李敏赵建成 College of Life Science Hebei Normal University College of Huihua Hebei Normal University

Nine species,Bryoerythriophyllum alpigenum(Vent.) Chen,Hyophila nymaniana(Fleisch.) Menzel, Phascum cuspidatum Hedw.,Dichodontium pellucidum(Hedw.)Schimp.,Ptychomitrium fauriei Besch., Tetraplodon mnioides(Hedw.) B.S.G,Plagiopus oederiana(Sw.) Crum et Anderson,Erythrodontium pallidifolium C.M(u|¨)*** Hylocomium splendens(Hedw.) B.S.G,are reported for the first time from Hebei *** to the specimens,identification features,major references,collected sites,characteristics of the habitat and distribution of every species are *** addition,the pictures of 9 species are drawn.

关键词： Hebei Province Mosses New record Taihang Mountain bashang plateau

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