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Gradients in N-cycling attributes along forestry and agricultural land-use systems are indicative of soil capacity for N supply. Repositório Alice
FAGOTTI, D. S. L.; MIYAUCHI, M. Y. H.; OLIVEIRA, A. G.; SANTINONI, I. A.; EBERHARDT, D . N.; NIMTZ, A.; RIBEIRO, R. A.; PAULA, A. M.; QUEIROZ, C. A. S.; ANDRADE, G.; ZANGARO, W.; NOGUEIRA, M. A..
Indicators of soil quality associated with N-cycling were assessed under different land-use systems (native forest ? NAT, reforestation with Araucaria angustifolia or Pinus taeda and agricultural use ? AGR) to appraise the effects on the soil potential for N supply. The soil total N ranged from 2 to 4g⁄ kg (AGR and NAT, respectively), and the microbial biomass N ranged from 80 to 250 mg⁄ kg, being higher in NAT and A. angustifolia, and lower in P. taeda and AGR sites. Activities of asparaginase (ca. 50?200 mg NH 4 + -N ⁄ kg per h), glutaminase (ca. 200?800 mg NH -N ⁄ kg per h) and urease (ca. 80?200 mg NH -N ⁄ kg ⁄ h) were also more intense in the NAT and A. angustifoliareforested soils,...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Solo; Qualidade; Nitrificação; Amonificação; Soil quality; Nitrification; Ammonification.
Ano: 2012 URL: http://www.alice.cnptia.embrapa.br/handle/doc/940939
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Soil health: looking for suitable indicators. What should be considered to assess the effects of use and management on soil health? Repositório Alice
CARDOSO, E. J. B. N.; VASCONCELLOS, R. L. F.; BINI, D.; MIYAUCHI, M. Y. H.; SANTOS, C. A. dos; ALVES, P. R. L.; PAULA, A. M. de; NAKATANI, A. S.; PEREIRA, J. de M.; NOGUEIRA, M. A..
Soil Health refers to the ecological equilibrium and the functionality of a soil and its capacity to maintain a well balanced ecosystem with high biodiversity above and below surface, and productivity. To understand and use soil health as a tool for sustainability, physical, chemical, and biological properties must be employed to verify which respond to the soil use and management within a desired timescale. Attributes with a rapid response to natural or anthropogenic actions are considered good indicators of soil health. Among the physical indicators, soil texture, aggregation, moisture, porosity, and bulk density have been used, while among chemical indicators total C and N, mineral nutrients, organic matter, cation exchange capacity, among others are...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Saúde do solo.
Ano: 2013 URL: http://www.alice.cnptia.embrapa.br/handle/doc/970661
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