Data/hora: 22/09/2024 21:43:16

Biblioteca(s): 	Embrapa Meio Norte / UEP-Parnaíba.	
Data corrente: 	21/12/1995	
Data da última atualização: 	21/12/1995	
Autoria: 	CARLYLE, J. C.; LOWTHER, J. R.; SMETHURST, P. J.; NAMBIAR, E. K. S.	
Afiliação: 	CSIRO.	
Título: 	Influence of chemical properties on nitrogen mineralization and nitrification in podzolized sands. Implications for forest management.	
Ano de publicação: 	1990	
Fonte/Imprenta: 	Australian Journal of Soil Research, v.28, p.981-1000, 1990.	
Idioma: 	Inglês	
Conteúdo: 	The relationship between selected chemical properties and nitrogen mineralization and nitrification was examined in soils collected from 39 sites of varying history. All sites were on podzolized sands; such soils represent more than 95% of the P. radiata growing area in south-east of South Australia/western Victoria. Given their uniformity in texture and similarity in pedogenesis, the organic matter concentrations of the sampled soils were highly variable (loss-on-ignition 0.8-10.2%). Total nitrogen was highly correlated with loss-on-ignition (r2 = 0.95, P menor igual 0.001). Nitrogen mineralization was correlated neither with total nitrogen nor loss-on-ignitition (i.e. P maior igual 0.05), but was correlated with organic phosphorus (r2 = 0.70, P menor igual0.001), suggesting a maior effect of phosphorus on nitrogen mineralization in these soils. On the basis of nitrate production during a 56-day aerobic incubation of disturbed soil, 18 soils were classed as strongly nitrifying (having a high potential to nitrify) and 18 as weakly nitrifying (having a low potential to nitrify). This separation reflected differences in other soils properties, with discriminant analysis giving a 91.7% correct classification into the two groups using only pH and Bray (II) extractable phosphorus for discrimination. Strongly and weakly nitrifying groups could also be discriminated on the basis of their value/chroma rating (after ignition), with a 94.4% probability of correct classification. Within each classification, nitrogen... 	
Palavras-Chave: 	Areias podzolicas; Forest; Podzolized sands.	
Thesagro: 	Floresta; Mineralização; Nitrificação; Nitrogênio.	
Thesaurus Nal: 	mineralization; nitrification; nitrogen.	
Categoria do assunto: 	--	
Registro original: 	Embrapa Meio Norte / UEP-Parnaíba (CPAMN-UEPP)	
Exemplares: 	CPAMN-UEPP - (4552-1) - ADP - SP - -- -  -  - 1995.00244 - DIS