摘要
土地资源质量和数量管控、特色土地资源开发利用、耕地保护规划和生态管护是当前生态文明建设中的一项非常重要的工作。以云南省盐津县兴隆乡、落雁乡和牛寨乡耕地连片分布区为研究区,开展1∶5万土地质量地球化学评价,并对耕地(园地)养分、环境和综合质量进行评价,尝试性地将土地质量地球化学评价成果与绿色食品、无公害农产品产地相关标准和《土壤污染防治行动计划》结合,开展特色土地资源开发利用和耕地保护规划研究。结果显示,研究区土壤和耕地(园地)综合质量均以三等以上(中等、良好和优质)为主,分别占研究区总面积、耕地(园地)总面积的72.88%、69.17%。圈定富硒土地资源191.73 km^2,占研究区总面积的75.53%;圈定富硒耕地(园地)66.84 km^2,占耕地(园地)面积的70.92%。发现符合绿色食品产地的耕地(园地)面积11.60 km^2,符合无公害农产品种植业产地环境条件的耕地(园地)面积11.76 km^2。根据《土壤污染防治行动计划》的规定,将研究区耕地(园地)划分成优先保护区、安全利用区和严格管控区,面积分别为65.57 km^2、21.67 km^2和7.00 km^2,占研究区耕地(园地)面积比依次为69.59%、22.98%和7.43%。该成果可为研究区所在地方政府履行土地资源管理、进行农业结构调整、实施土壤环境保护、支撑脱贫攻坚等管理职能提供科学依据,为提升土地质量地球化学评价成果的利用程度及成果转化提供借鉴,对丰富和完善土地质量地球化学评价体系具有重要意义。
Controlling the quality and quantity of land resources,development and utilization of special land resources,farmland protection and the management of ecological protection are very important in the construction of ecological civilization.A research on the assessment methods of 1∶50,000 land quality geochemical survey at Xinglong,Luoyan and Niuzhai towns of Yanjin county in Yunnan province was carried out.The soil samples were collected at a density of 9.17 samples/km^2.The distribution of nutritive elements and heavy metal elements,and the comprehensive quality of soil in the study area were studied.For delineating special land resources,the national standard of green food-environmental quality for production area and pollution-free agricultural products-environmental quality for production area were tentatively applied in this study.Research on farmland protection planning was carried out,according to the soil pollution controlling action program enacted by State Council of the People’s Republic of China.Results show that 72.88 percent of the study area and 69.17 percent of the cultivated land area are assessed above three-class as shown in the national standard of specification of land quality geochemical assessment.Selenium-enriched land with area of 191.73 km^2,that is accounting for 75.53 percent of the total study area,is discovered.Selenium-enriched farmland and garden plot with area of 66.84 km^2 are discovered,accounting for 70.92 percent of the total cultivated land and garden plot area in the study area.The farmland and garden plot that meet requirements of production area of the green food and pollution-free agricultural products are distinguished,and the area are 11.60 km^2 and 11.76 km^2,respectively.The farmland and garden plot are marked out as priority reserve area,security utilization area and strict control area,with the area of 65.57 km^2,21.67 km^2,7.00 km^2,and accounting for 69.59,22.98 and 7.43 percent of the total farmland and garden plot area in the study area,respectively.These results could be used to the land resource management,agricultural structure adjustment,soil environmental protection and po-verty overcoming for the local government.It also could be used as a reference for improving the utilization degree and achievement transformation of land quality geochemical assessment results.It is of great significance to enrich and perfect the system of land quality geochemical assessment.
作者
杨帆
张舜尧
宋云涛
王惠艳
韩伟
郭志娟
彭敏
王成文
陈子万
白兵
YANG Fan;ZHANG Shunyao;SONG Yuntao;WANG Huiyan;HAN Wei;GUO Zhijuan;PENG Min;WANG Chengwen;CHEN Ziwan;BAI Bing(Research Center of Geochemical Survey and Assessment on Land Quality,China Geological Survey,Langfang,Hebei 065000,China;Key Laboratory of Geochemical Cycling of Carbon and Mercury in the Earth’s Critical Zone,Chinese Academy of Geological Sciences,Langfang,Hebei 065000,China;Institute of Geophysical and Geochemical Exploration,Chinese Academy of Geological Sciences,Langfang,Hebei 065000,China;Yunnan Institute of Geological Survey,Kunming,Yunnan650216,China)
出处
《现代地质》
CAS
CSCD
北大核心
2020年第6期1318-1332,共15页
Geoscience
基金
中国地质调查局项目(DD20190522,DD20190527,DD20189123,DD20160313)。
关键词
土地质量地球化学评价
富硒土地
绿色食品
无公害农产品
耕地
geochemical assessment of land quality
selenium-enriched land
green food
nuisance free agricultural product
cultivated land
