Data/hora: 19/06/2024 12:27:17

Biblioteca(s): | Embrapa Soja.
Data corrente: | 06/01/1993
Data da última atualização: | 31/08/2017
Autoria: | DICK, R. P.
Afiliação: | 202 Strand Agricultural Hall, Department of Crop and Soil Science, Oregon State University, Corvallis, OR 97331, USA.
Título: | A review: long-term effect of agricultural systems on soil biochemical and microbial parameters.
Ano de publicação: | 1992
Fonte/Imprenta: | Agriculture, Ecosystems & Environment, v.40, p.25-36, 1992.
Idioma: | Inglês
Conteúdo: | This paper provides a review of recent developments on assessing the effect of agricultural systems on long-term productivity of soils. Cultivation of soils, besides affecting soil chemistry and structure, reduces biological activity due to the reduction of macoraggregates which provides and important microhabitat for microbial activity. Indirect evidence suggests that soil amendments such as animal and green manures, and plant diversity than consevation tillage in monocultural systems. The is increasing evidence that crop rotation promotes crop productivity by suppressing deleterious microorganisms that flourish under monoculture. Additions of inorganic fertilizers can increase soil biological activity because of an increased plant biomass production which upon incorporation stimulates soil biological activity. Conversely, limited evidence suggests that repeated applications of inorganic fertilizer nutritents can suppress production of certain soil enzymes that are are involved in cycling of a given nutrient. The observed transitory decrease in crop productivity during conversion from chemical intensive input to alternative systems (greater reliance on biological resources) may be due to the initial diminished biological potentials of conventionally managed soils to efficiently cycle and mineralize organic nutrient sources. This review reaffirms the continuing need for the maintenance of existing long-term experimental sites and establishment of new studies in major agrocecosystems throughout the world.
Palavras-Chave: | Cultura; Long-term productivity; Longo prazo; Rotacao; Soil tillage.
Thesagro: | Bioquímica; Manejo; Microbiologia; Produtividade; Solo.
Thesaurus Nal: | crop rotation; microbiology; soil biochemistry.
Categoria do assunto: | --
Registro original: | Embrapa Soja (CNPSO)
Exemplares: | CNPSO - (13623-1) - ADD - SP - -- - 9932 -  - 9932 - DIS