GAI Zhaoxue,CHEN Xufei,DU Guoming.Spatiotemporal Pattern of Cultivated Land Fragmentation in Baiquan County of Black Soil Region[J].Research of Soil and Water Conservation,2022,29(02):355-361.
黑土区拜泉县耕地破碎化时空变化分析
- Title:
- Spatiotemporal Pattern of Cultivated Land Fragmentation in Baiquan County of Black Soil Region
- 文章编号:
- 1005-3409(2022)02-0355-07
- 分类号:
- F323.21
- 文献标志码:
- A
- 摘要:
- 为识别黑土区拜泉县耕地破碎化类型和评估耕地破碎化程度,基于2000年、2005年、2010年和2015年4期耕地利用数据,利用移动窗口技术,在像元水平上定量反映耕地破碎化过程,揭示了耕地破碎化的基本特征和时空格局,并在县级尺度和村级尺度上分析了耕地破碎化的变化规律和特征。结果表明:(1)2000—2015年拜泉县耕地破碎化程度整体呈现“缓慢—急剧—缓慢”的趋势,2005—2010年是耕地破碎化变化的快速时期;(2)拜泉县耕地破碎化空间上呈现“孔洞耕地为主导,核心耕地分布集中”的特点,2010年后斑块耕地一直处于增加的趋势,耕地破碎化问题日益突出;(3)乡镇级尺度上,2000—2005年西部和东部地区耕地破碎化程度较大,2010—2015年除中部地区外,其余地区斑块耕地比例均稳定增加,核心耕地比例减少,耕地破碎化程度呈上升趋势;(4)村级尺度上,拜泉县各个村的耕地破碎化程度有较大差异;(5)拜泉县耕地破碎化原因主要受自然、利用、设施和管理切割力的影响。综上,自然—人文双重因子作用导致研究区耕地破碎化的时空差异。
- Abstract:
- In order to identify the types of cultivated land fragmentation and evaluate the degree of cultivated land fragmentation in Baiquan County of black soil region, based on the four periods of cultivated land use data in 2000, 2005, 2010 and 2015, this study quantitatively reflected the process of cultivated land fragmentation at pixel level through using moving window technology, revealed the basic features and spatiotemporal pattern of cultivated land fragmentation, and analyzed the change rules and characteristics of cultivated land fragmentation on the county and village scales. The results showed that:(1)the degree of cultivated land fragmentation in Baiquan County presented a ‘slowly sharply slowly' trend in 2000—2015, and this term was the rapid change period of cultivated land fragmentation;(2)in terms of spatial pattern, the cultivated land fragmentation in Baiquan County illustrated the characteristics of ‘hole cultivated land dominated and core cultivated land widely distributed'; since the rapid development of social and economy after 2010, the patch cultivated land had been increasing, and the problem of cultivated land fragmentation had become increasingly prominent;(3)at the township level, the degree of cultivated land fragmentation increased in the east and west regions in the period 2000—2005, and except the central region, the proportion of patch cultivated land increased steadily in the period 2010—2015, while the proportion of core cultivated land decreased and the degree of cultivated land fragmentation intensified;(4)at the village level, the degree of cultivated land fragmentation in each village in Baiquan County had large difference;(5)the causes of farmland fragmentation were mainly affected by the cutting forces of nature, utilization, facilities and management in Baiquan County. All in all, the combined effects of natural and cultural factors lead to the spatial and temporal differences of cultivated land fragmentation in the study area.
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备注/Memo
收稿日期:2021-03-17 修回日期:2021-03-31
资助项目:黑龙江省自然科学基金(LH2019D012); 国家自然科学基金(41461040); 东农学者计划项目(19QC37)
第一作者:盖兆雪(1990—),女,黑龙江双城人,博士,讲师,主要从事土地/耕地资源优化配置研究。E-mail:gaizhaoxue@163.com
通信作者:杜国明(1978—),男,内蒙古宁城县人,博士,教授,主要从事土地资源优化配置与农村发展研究。E-mail:nmgdgm@126.com