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Journal of Agriculture ›› 2019, Vol. 9 ›› Issue (1): 16-20.doi: 10.11923/j.issn.2095-4050.cjas18030013

Special Issue: 耕地保护

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Temporal and Spatial Changing of Farmland pH Value in Hanjiang District, Yangzhou

  

  • Received:2018-03-15 Revised:2018-05-22 Accepted:2018-06-06 Online:2019-01-18 Published:2019-01-18

Abstract: 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.