Data/hora: 28/05/2024 09:21:46

Biblioteca(s): 	Embrapa Agrobiologia; Embrapa Pantanal.	
Data corrente: 	27/06/1995	
Data da última atualização: 	02/08/1995	
Autoria: 	NYBORG, M.; HOYT, P. B.	
Título: 	Effects of soil acidity and liming on mineralization of soil nitrogen.	
Ano de publicação: 	1978	
Fonte/Imprenta: 	Canadian Journal of Soil Science, v.58, n.3, p.331-338, Aug. 1978.	
Idioma: 	Inglês
Português	
Conteúdo: 	Forty acid surface soils of pH 4.0-5.6 were incubated with and without lime, and the amounts of N that were mineralized or nitrified were statisticaly compared with several soil acidity characteristics. In addition, three field experiments were used to find the effect of liming on N mineralization. There was no relation between the amounts of mineral N released per unit or organic N in 120 days of incubation and soil pH, base saturation or soluble Fe, Al or Mn. Despite this, limiting the soils to about pH 6.7 approximately doubled the amounts of N mineralized during incubation. In the field experiments, lime increased uptake of soil N by 15-42 kg/ha in the 1 st yr but only 7-10 kg/ha in the 3rd yr. Thus these laboratory and field experiments indicated that soil acidity does not restrict mineralization of organic N and although limiting increase mineralization of N, it is generally a temporary effect. Nitrification in the 40 incubated soils occurred much m,ore rapidly in culktivated soils than in virgin soils. For both the virgin and cultivated soils, nitrification decreased with decreasing soil pH. However, nitrification was not statistically related to base saturation or soluble Fe, Al or Mn. Liming established good nitrification in most of the soils and this effect did not diminish with time.	
Thesagro: 	Mineralização; Nitrificação; Nitrogênio; Química do Solo; Solo.	
Thesaurus Nal: 	mineralization; nitrogen; soil.	
Categoria do assunto: 	--	
Registro original: 	Embrapa Pantanal (CPAP)	
Exemplares: 	CNPAB - (5210-1) - ADC - SP - -- -  -  - 03680 - DIS
CPAP - (28931-1) - ADD - SP - -- - SP0628 -  - 0628 - DIS