摘要
【目的】探明湖南省坡耕地区所在区域综合质量的时空分异格局及变化成因。【方法】利用层次分析法和隶属度函数模型、综合指数模型以及局部自相关模型,以凤凰县第二次全国土地调查和第三次全国国土调查的耕地数据为底图,对凤凰县2010年及2020年的耕地质量进行定量化评价,分析其时空分异的特征及其影响因素。【结果】①凤凰县耕地质量在2010—2020年整体呈上升趋势,全县耕地以中等质量耕地为主。②凤凰县2期耕地质量等级的区间分布情况和空间分布情况具有一定的相似性,区间分布变化主要由耕地的农田管理、养分状况的相关指标变化引起,而空间分布的变化的原因主要是高标准农田、坡耕地治理等工程建设。③凤凰县耕地质量存在空间自相关性,区域间的生产要素流动性增强,区际耕地质量差异缩小是导致高-高型和低-低型分布形态发生变化的原因。④考虑坡耕地区安全生产、平稳经济及保护生态等目标,将凤凰县划分为优先保护区、适宜改良区、质量挖潜区以及综合整治区4个管理分区。【结论】凤凰县2020年耕地综合质量较2010年提高约0.08个等级,在坡耕地区因地制宜地实施坡耕地治理等工程措施对于耕地质量有一定的正向影响,未来可结合质量管理分区结果对坡耕地的质量维护和提升进行现实指导。
【Objective】Soil health is a term increasingly used to quantify soil productivity and sustainability.It is affected by many abiotic and biotic factors and varies spatiotemporally.The purpose of this paper is to investigate the health of soils in slope farmlands in Hunan Province.【Method】The study is based on second and third national land survey data in Fenghuang county,conducted in 2010 and 2020 respectively.Spatiotemporal variation in soil health and its determinants are calculated using the analytic hierarchy process(AHP),membership function model,comprehensive index model and local autocorrelation model.【Result】①Soil health in Fenghuang county had improved from 2010 to 2020,with the quality of most soils in medium range.②Temporal variation in soil health across the county was mainly induced by change in farmland management and nutrient application,while spatial change was mainly caused by construction of high-standard farmlands and sloped farmlands.③The spatial autocorrelation of soil health,enhanced inter-regional mobility of production factors,and reduced inter-regional difference were responsible for the change in the High-High and Low-Low distribution patterns of soil health.④Considering crop production security,sustainable economy and ecology,soil health in the county can be divided into four management zones:priority protection zone,suitable improvement zone,potential zone and comprehensive regulation zone.【Conclusion】The health of farmland soils in Fenghuang county had increased by 0.08 grade from 2010 to 2020.Implementing the slope cultivated-land management and other engineering measures had a positive impact on improving soil health.Soil quality maintenance and sloping land improvement should consider the special conditions in each of the four management zones.
作者
董曼慧
夏卫生
李丽
周浩
DONG Manhui;XIA Weisheng;LI Li;ZHOU Hao(College of Geographic Science,Hunan Normal University,Changsha 410000,China)
出处
《灌溉排水学报》
CAS
CSCD
北大核心
2022年第12期89-96,106,共9页
Journal of Irrigation and Drainage
基金
湖南省自然资源厅项目(2020-05)
农业部长江中游平原农业环境重点实验室开放基金项目(531220-1291)。
关键词
坡耕地区
耕地质量等级
时空变化
凤凰县
slope farmland area
cultivated land quality
spatio-temporal variance
Fenghuang County
