Soil quality indicators in a rhodic kandiudult under different uses in northern Parana, Brazil

Revista Brasileira de Ciência do Solo

Biana Harumi Kuwano²  Adriana Knob¹  Dáfila Santos Lima Fagotti²  Nagib Jorge Melém Júnior²  Leandro Godoy¹  Raquel Cátia Diehl²  Cristina Célia Krawulski²  Galdino Andrade Filho¹  Waldemar Zangaro Filho¹  João Tavares-filho¹  Marco Antonio Nogueira¹ 

[1] ,Universidade Estadual de Londrina Centro de Ciências Agrárias Londrina PR ,Brazil

关键词: bioindicators;    land use;    metabolic coefficient;    microbial biomass;    soil enzymes;    soil quality;    bioindicadores;    biomassa microbiana;    coeficiente metabólico;    enzimas do solo;    qualidade do solo;    uso do solo;   

DOI  :  10.1590/S0100-06832014000100005

来源: SciELO

【 摘 要 】

Sustainable use of soil, maintaining or improving its quality, is one of the goals of diversification in farmlands. From this point of view, bioindicators associated with C, N and P cycling can be used in assessments of land-use effects on soil quality. The aim of this study was to investigate chemical, microbiological and biochemical properties of soil associated with C, N and P under different land uses in a farm property with diversified activity in northern Parana, Brazil. Seven areas under different land uses were assessed: fragment of native Atlantic Forest; growing of peach-palm (Bactrys gasipaes); sugarcane ratoon (Saccharum officinarum) recently harvested, under renewal; growing of coffee (Coffea arabica) intercropped with tree species; recent reforestation (1 year) with native tree species, previously under annual crops; annual crops under no-tillage, rye (Cecale cereale); secondary forest, regenerated after abandonment (for 20 years) of an avocado (Persea americana) orchard. The soil under coffee, recent reforestation and secondary forest showed higher concentrations of organic carbon, but microbial biomass and enzyme activities were higher in soils under native forest and secondary forest, which also showed the lowest metabolic coefficient, followed by the peach-palm area. The lowest content of water-dispersible clay was found in the soil under native forest, differing from soils under sugarcane and secondary forest. Soil cover and soil use affected total organic C contents and soil enzyme and microbial activities, such that more intensive agricultural uses had deeper impacts on the indicators assessed. Calculation of the mean soil quality index showed that the secondary forest was closest to the fragment of native forest, followed by the peach-palm area, coffee-growing area, annual crop area, the area of recent reforestation and the sugarcane ratoon area.

【 授权许可】

CC BY   
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