土壤风蚀对边际耕地质量影响评价——以河北省丰宁坝上高原为例  

Evaluation of effects of soil wind erosion on marginal cultivated land quality——A case study in Fengning Bashang plateau of Hebei Province

作　　者：袁静[1] 赵烨[1] 高丽[1] 李天杰[1] 梁雪石[2] 郑福云[2] 

机构地区：[1]北京师范大学环境模拟与污染控制国家重点联合实验室,北京100875 [2]黑龙江省科学院自然与生态研究所湿地与生态保育国家地方联合工程实验室,哈尔滨150040

出　　处：《国土与自然资源研究》2015年第5期22-25,共4页Territory & Natural Resources Study

基　　金：国土资源部土地整治中心资助研究项目;黑龙江省财政自拟项目:"黑龙江省生态资源价值核算技术及生态补偿策略研究(ZRS201301)"

摘　　要：文章在综合分析河北省丰宁坝上区域自然环境条件与土地利用特征的基础上,在暗栗钙土区域布设6个旱耕地样区,并在每个样区用梅花布点法布设12个观测样点,采集土壤样品并进行化验分析,依据《农用地质量分等规程》和综合比较研究法,综合评价了土壤风蚀对耕地质量等级的影响。结果表明,丰宁坝上区气候条件是边际耕地形成的主因;冬春季松散、干燥、裸露的耕地表土遭受风蚀,致使耕作层有机质、黏粒、粉粒含量分别减少了约46%、31%和26%;研究区耕地土壤风蚀平均速率为3.67mm/a,可使耕地质量等级每年降低0.75%,且随时间耕地质量等级将呈现加速下降趋势;现有的土壤质地划分方法难以刻画风蚀对表土层土壤质地的影响,亟待研发更为详细的土壤质地划分方案。According to the natural environmental conditions and land use characteristics of Bashang plateau and Regulation for gradation on agriculture land quality（GBT28407-2012） , the study evaluate the effects of soil erosion to marginal cultivated land quality. This study set 6 sampling areas of drought cultivated land and in each sample area layout 12 observation points. The result shows that the climate conditions is the main reason of the formation of marginal cultivated land. The content of organic matter, clay and silt in plough layer has reduced about 46%, 31%and 26% respectively due to soil erosion in Winter and Spring.The average soil erosion speed is 3.67 mm/a and it can make the cultivated land quality grade lower 0.75% per year. Over time, the cultivated land grade will fall more sharply. The existing soil texture classification method is difficult to describe the effects of soil erosion to marginal cultivated land and it is necessary to develop more detailed soil texture classification scheme.

关 键 词：边际耕地 风蚀 耕地质量影响评价 河北丰宁坝上 

分 类 号：S158.1[农业科学—土壤学]