Data/hora: 21/06/2024 03:59:04

Biblioteca(s): 	Embrapa Amazônia Ocidental.	
Data corrente: 	17/02/2017	
Data da última atualização: 	17/02/2017	
Autoria: 	McCAFFERY, K. A.	
Afiliação: 	Karen Anne McCaffery.	
Título: 	Carbon and nutrients in land management strategies for the Brazilian Amazon.	
Ano de publicação: 	2003	
Fonte/Imprenta: 	2003.	
Páginas: 	204 f.	
Idioma: 	Inglês	
Notas: 	Tese (Ph.D.) - Cornell University, 2003.	
Conteúdo: 	This dissertation evaluates three areas of land management for restoring the productivity of deforested, degraded land in the Brazilian Amazon: Agroforestry, improved fallows and the influence of fertilizer on decomposition dynamics. Chapter One is a literature review on deforestation and current land managemeht in the Amazon. Chapter Two reports a field study on biomass, carbon and nutrient stocks in three agroforestry systems nine years after establishment on abandoned pastures, compared to secondary forest. Estimates were derived by conducting a destructive harvest and using allometry. Carbon stocks were 53.8,41.7,34.3 and 16 Mg ha-¹ corresponding to accumulation rates of 5.9, 4.6, 3.8 and 1.8 Mg ha-¹ yr-¹ in the secondary forest, palm, fruit and pasture systems, respectively. The vaiue of agroforestry in sustainable agriculture is discussed. Chapter Three reports an improved fallows experiment in which legume trees were grown with modest chemical inputs of P, lime and gypsum. One year after planting, soil chemical properties, above ground and root biomass and rooting depth were evaluated via soil coring and a destructive harvest. Soil Ca levels were increased to 35 em depth where gypsum was added with lime. The gypsum led to loss of Ca below the rooting zone. Plants grown with P and lime alone produced more root biomass and were deeper rooted than plots treated with gyspum. Senna reticulata produced 16.6 Mg ha-¹ above ground biomass in the PLG ­treatment compared to 1.5 Mg ha-¹ in the CTRL. Inga edulis produced the most above ground biomass (5.5 Mg ha-¹) in plots treated with P and lime.	
Palavras-Chave: 	Agrofloresta; Área degradada.	
Categoria do assunto: 	--	
Registro original: 	Embrapa Amazônia Ocidental (CPAA)	
Exemplares: 	CPAA - (36078-1) - ADD - TS - PP - T0037/2003 -  - 2017.00003 - DIS