摘要
利用了扬州市邗江区2014年采集的834个耕地土样以及1984年第二次土壤普查样品(527个)进行比较,基于ArcGIS 10.1、SPSS 19等软件研究了30年土壤pH值时空演变。结果表明:邗江区2014年土壤平均pH 6.23,以Ⅱ级(6.5～7.5)、Ⅲ级(5.5～6.5)为主,占整个耕地面积的92.66%;比1984年下降0.88单位,1984年土壤pH值以Ⅱ级(6.5～7.5)为主,占整个耕地面积的98.96%;30年间耕地土壤pH值呈整体下降趋势,主要影响因素有酸性降雨和施肥。
The spatial-temporal changing of soil pH value over 30 years in the Hanjiang District of Yangzhou City was studied based on ArcGIS 10.1 and SPSS 19 by comparing 834 farmland soil samples collected in 2014 and 527 samples of the Second Soil Survey in 1984.The results showed that the average soil pH value in 2014 was 6.23,which was dominated by Grades Ⅱ(6.5-7.5)and Ⅲ(5.5-6.5),accounting for 92.66%of the entire cultivated area.In 1984,the soil pH value was mainly Grade Ⅱ(6.5-7.5),accounting for 98.96% of the entire cultivated area.The pH value was 0.88 unit lower in 2014 than that in 1984.The pH value of cultivated soil showed an overall downward trend during the 30 years,mainly caused by acidic rainfall and fertilization.
作者
刘燕
毛伟
杨晓东
陈明波
高晖
步学林
Liu Yan;Mao Wei;Yang Xiaodong;Chen Mingbo;Gao Hui;Bu Xuelin(Institute of Hanjiiang Soil and Fertilizer,Yangzhou 225009,Jiangsu,China;Station of Land Protection of Yangzhou City,Yangzhou 225101,Jiangsu,China;Comprehensive Agricultural Service Center of Gongdao Town in Hanjiang District,Yangzhou 225119,Jiangsu,China)
出处
《农学学报》
2019年第1期16-20,共5页
Journal of Agriculture
基金
江苏省农业三新工程"扬州地区补充耕地快速培肥技术集成与推广"(sxgc[2017]158)
耕地质量提升与化肥减量增效项目(苏财农[2017]68号)
关键词
土壤PH值
时空演变
酸雨
施肥
Soil pH Value
Spatiotemporal Changing
Acidic Rainfall
Fertilization
