The Effects of Land Use Change on Land Quality at Patch Scale &mdash|A Case Study in Zhangbei County, Hebei Province
Received date: 2006-01-01
Revised date: 2006-04-01
Online published: 2006-05-25
Huge press on natural resources and environment in China requires the study of the regional land quality pertinent to land degradation. Land use, which is exhibited as patches in space, has a close relationship with land quality. The research of the relationship between land use and land quality at patch scale can improve our under standing of the effects land use changes on land quality. The Ministry of Land and Resources implemented “Remote Sensing Monitoring on Land Resources and Eco - environment in Area around Beijng”and“Remote Sensing Monitoring Study for Distribution of Cultivated Farmland and Grain for Green in Typical Regions around Beijing”projects from 2002 to 2004. With the help of the project's achievements, the cultivated farmland changes in Zhangbei County, Hebei province, from 1999 to 2003 were analyzed by using the SPOT2/4 and SPOT5 remote sensing data. The degradation character of changed patches from cultivated land in 1999 to grassland and forest land in 2003, from grassland and forest land in 1999 to cultivated land in 2003 and unchanged cultivated land were analyzed by the application of GIS and statistical methods. The cultivated land decreased by 20229.5ha in 2003 compared to 1999, most of which turned into grassland and forest land, and the main type is the change of farmland to man- made grassland. The most of newly increased cultivated land came from grassland. The area of un- degraded patches in all types from cultivated land to grassland and forest land, except the change from farmland to low- density forest land, are larger than degraded patches, indicating these change types could lead to a higher land quality. The changed patches from forest land to farmland and from grassland to irrigated farmland have an obvious degradation inclination; however, the proportion of changed patches' area and quantities from grassland to farmland, from other land to farmland and from grassland to vegetable land is not large. Compared to un- changed cultivated patches, the area proportion of undegraded patches to total changed patches from farmland to grassland is larger and the quantity proportion is similar; the area and quantity proportion from farmland to grassland is not different largely. Both area and quantity proportions of un- degraded patches from farmland to forest land are larger than those from forest land to farmland. These results indicate the transition from farmland to forest land and grassland can improve the regional land quality.
Key words: land degradation; land quality; land use change; patch scale
GUO Xudong,XIE Junqi,HE Ting . The Effects of Land Use Change on Land Quality at Patch Scale &mdash|A Case Study in Zhangbei County, Hebei Province[J]. PROGRESS IN GEOGRAPHY, 2006 , 25(3) : 116 -127 . DOI: 10.11820/dlkxjz.2006.03.014
[1] J Stolte, C J Ritsema, J Bouma. Developing interactive land use scenarios on the Loess Plateau in China, presenting risk analyses and economic impacts. Agriculture, Ecosystem and Environment 2005, 105: 387~399.
[2] Chen Liding, Fu Bojie, Zhang Shurong, Qiu Jun, Guo Xudong, Yang Fulin. A comparative study on N- concentration in surface water in a heterogeneous landscape. Environmental Geology: 2002, 424~432.
[3] 董硕, 高新法, 胡引翠. 河北坝上地区土地沙化成因分析及对策研究—以丰宁、沽源、张北3 县为例, 河北师范大学学报( 自然科学版) , 2001, 25, 4: 537~542.
[4] 傅伯杰, 郭旭东, 陈利顶, 马克明, 李俊然. 土地利用变化与土壤养分变化—以河北省遵化县为例. 生态学报, 2001, 21 ( 7) : 926~931.
[5] 海春兴, 马礼, 王学萌, 李璐. 农牧交错带典型地段土地沙化主要因素分析—以河北坝上张北县为例. 地理研究, 2002, 21, 5: 543~550.
[6] 李晓秀, 马礼. 小二台乡农业生态环境特点与分区可持续发展. 首都师范大学学报(自然科学版), 2004, 25, 3: 69~72.
[7] 杨莉琳, 毛任钊. 张北县水土资源高效利用的模式与技术探讨. 水土保持学报, 2004. 18, 2: 105~108.
[8] 姚华荣, 吴绍洪, 曹明明, 杨勤业. 区域水土资源的空间优化配置. 资源科学, 2004, 26, 1: 99~106.
[9] 张志东, 关楠, 乔忠民, 张英娜, 黄选瑞. 张北县可持续发展能力评价. 河北农业大学学报, 2003, 26, Sup.: 214~218.
[10] 张志东, 黄选瑞, 张玉珍, 聂犇, 胡玉山. 张北县退耕还林对粮食生产的影响分析. 林业科学, 2004, 40, 5: 10~15.
[11] 彭文英, 张科利, 陈瑶, 杨勤科. 黄土坡耕地退耕还林后土壤性质变化研究. 自然资源学报, 2005, 20( 2) : 272~278.
[12] 郭旭东, 邱扬, 连纲, 刘康. 基于PSR 框架的土地质量指标体系研究进展与展望. 地理科学进展, 2003, 22( 5) : 479~489.
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