[Objective] This study was to provide basis for the scientific management of land use in Haihe River Basin （HRB） through the quantitative exploration of the land use conversion, changes of intensity and spatial distribution in this region. [Method] With the support of remote sensing technology and geographic information technology, the land use maps of the study area in 40 years （1970-2010） were in- terpreted and plotted. Four kinds of tupu, namely, land use change tupu, process tupu, arising tupu and evolution mode tupu were built through the spatial overlay of the land use maps to analyze the change rules of land use patterns. [Result] The conversion of arable land to construction land was the main characteristics of land use changes in HRB for the 40 years; the area of non-stable region accounted for 35% of the total, indicating that the land use changed remarkably, thus, it was nec- essary to strengthen the scientific land management in HRB; the new conversions to all land use patterns were all the lowest in 1980-1990, indicating that land use changed slowly during this period. [Conclusion] The results indicate that, compared with conventional transfer matrix method, geo-information tupu has obvious advantage in analyzing land use changes that it can demonstrate the spatial distribution of interest region, display the multi-dimensional spatial information.
运用CNKI和ISI Web of Knowledge两大数据库的文献计量分析工具,统计了1981年到2010年间在中国科学院栾城农业生态系统试验站开展科学研究的科技论文发表情况。结果表明:所检索到的过去30年发表的论文为1 151篇,其中中文论文920篇、英文论文231。1981-2010年,年度发表论文数量呈稳步增长趋势,2001年以前发表的科技论文主要以中文论文为主,2001年以后英文论文数量逐年增加,年均增长速度为22.4%;中文论文2005年达到高峰后逐年减少。论文作者单位主要集中在河北、北京、山东等地,与国外合作单位主要集中在日本、美国。论文的关键词出现频率较高的为:小麦、水分利用效率、玉米、产量、土壤水分等。开展研究所得到的资助项目主要以国家科研计划项目和中国科学院科研计划项目为主,其次为地方科研计划项目,国际合作项目相对较少。论文发表的期刊来源主要为:《中国生态农业学报》、《干旱地区农业研究》、《华北农学报》、《Hydrological Processes》、《Agricultural Water Management》、《Plant,Soil and Environment》、《Irrigation Science》。发表论文的平均引用次数为5.6次,引用次数超过100次的论文为6篇,引用次数超过50次的论文为34篇。
