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4611576 
Book/Book Chapter 
The Distribution Characteristics of Soil pH Values of Tobacco-growing Areas in Dali City and Its Correlation with Soil Nutrients 
Yang, C; Zhao, Yu; Wang, X; Yang, C; Yang, Z; Hu, Y; Sun, J; Wang, D 
2015 
Hunan Academy of Agricultural Sciences 
16 
5 (May 2015) 
951. 
The aim was to study the distribution characteristics of soil pH values and its correlation with soil nutrients in tobacco-growing areas. Soil nutrients of 43 samples from tobacco-growing areas in Dali City were analyzed. The results showed that average pH value of tobacco-planting soil in Dali City was 6.52, soil samples which suited for flue-cured tobacco cultivation accounted for 72.09% of total soil samples. In four soil types of tobacco-growing areas, the pH values in a descending order were as follows: alluvial soil > paddy soil > purple soil > red soil. At the altitude range of 1,780-2,200 m, soil pH values showed a gradual decreasing trend. The average contents of soil organic matters were relatively abundant and generally suited for high-quality tobacco cultivation; the average contents of soil alkali-hydrolyzable nitrogen, available phosphorus, exchangeable calcium and exchangeable magnesium were generally at medium and abundant level, however, their rations under the medium level in some tobacco-growing areas were 6.98%, 11.63%, 2.33% and 4.65%, respectively. 
Soil types; Calcium; Organic matter; Soil pH; Phosphorus; Soils (organic); Soil nutrients; Altitude; Rice fields; Tobacco; Magnesium; pH effects; Nitrogen