Ecological Stoichiometry Characteristics of Tobacco Planting Soil in Miyi, Panzhihua

doi:10.11924/j.issn.1000-6850.casb16030193

Abstract

Abstract: In order to clarify the effect of long- term tobacco cultivation on ecological stoichiometry characteristics of soil and provide scientific basis for ecological resistance measures in tobacco-planting area of Miyi, comparative analysis of soil ecological chemistry characteristics between the Second Soil Survey (1982s) and current situation (2013s) were conducted. The results showed that: (1) long-term cultivation of tobacco resulted in large quantities of organic carbon consumption, compared with the data of the Second Soil Survey, C/N, C/P and C/K decreased by 23.69%, 23.63% and 7.16%, respectively, which was caused by the enrichment of total nitrogen, phosphorus and potassium in different degrees, N/P decreased by 15.98% in comparing with that of the Second Soil Survey, due to the fact that phosphorus could be more easily stabilized in soil and had a relatively bigger increasing range; (2) soil organic carbon content was significantly positive correlated with N/P, N/K and P/K, indicating that soil organic carbon content was the major influence factor of soil ecological stoichiometry in tobacco-planting area in Miyi. The supplement of soil organic carbon should be highlighted.

CLC Number:

S572

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