Data/hora: 02/06/2024 05:34:43

Biblioteca(s): 	Embrapa Rondônia.	
Data corrente: 	05/10/2020	
Data da última atualização: 	06/10/2020	
Autoria: 	BONGIOLO, E. S.; KAINER, K. A.; CROPPER, W.; STAUDHAMMER, C. L.; WADT, L. H. de O.	
Afiliação: 	Eduardo S. Bongiolo, University of Florida; Karen A. Kainer, University of Florida; Wendell Cropper, University of Florida; Christina L. Staudhammer, University of Alabama; LUCIA HELENA DE OLIVEIRA WADT, CPAF-RO.	
Título: 	Swidden fallow management to increase landscape-level Brazil nut productivity.	
Ano de publicação: 	2020	
Fonte/Imprenta: 	Forest Ecology and Management, v. 464, n. 118019, 2020.	
ISSN: 	0378-1127	
Idioma: 	Inglês	
Conteúdo: 	Brazil nut (Bertholletia excelsa Bonpl.) is considered the cornerstone non-timber species of Amazonian conservation. Nuts (or seeds) of this massive tree are harvested by local people living in and near old growth forests, supporting local livelihoods and regional economies. Secondary forests, however, particularly plots previously used for agriculture (swidden fallows), present better B. excelsa seedling and sapling recruitment than mature forest. This study examines the extent to which forest residents could increase nut productivity by allowing their fallows to grow into Brazil nut rich forests. We conducted B. excelsa inventories in the Brazilian state of Acre in abandoned swidden fallows of different ages. We also conducted interviews to determine landowner perspectives on the fallow potential for increasing nut production. An individual-based model, based on in-situ inventories and primary and secondary datasets from prior fieldwork, simulated growth, survivorship and production from the 250 inventoried trees in 18 fallows of varying sizes (from 0.41 to 4.18 ha) and different regrowth stages (12 to 60 years old). These simulation model predictions showed that after 10 years, 2.4% of existing trees would be productive, with an average of 68.6 ± 21.5 fruits per reproductively mature tree in the four fallows that most quickly yielded productive trees. By the final projected time interval (40 years), predictions suggest all fallows will produce fruits with cumulative production averaging 1475 ± 359 fruits ha?1, suggesting an increase in landowner income of US$55.1 ± 13.4 per hectare of fallow. Our simulation model is the first to explore fruit productivity of Brazil nut in secondary forest. It likely underpredicts B. excelsa growth and nut production, considering that swidden fallows provide better resource availability than the forest-derived datasets we used to construct the model equations. In conclusion, our findings support previous research that suggests that higher B. excelsa recruitment rates observed in abandoned swidden fallows could indeed translate into greater adult densities and thus potentially, higher nut production – a conclusion mirrored by most participant landowners.	
Palavras-Chave: 	Acre; Amazônia Ocidental; Castanha do brasil; Produto florestal não madeireiro (PFNM); Swidden fallow; Western Amazon.	
Thesagro: 	Bertholletia Excelsa; Castanha do Para; Pousio; Pratica Cultural; Rendimento.	
Thesaurus Nal: 	Brazil nuts; Crop yield; Nontimber forest products; Plant cultural practices; Shifting cultivation.	
Categoria do assunto: 	K Ciência Florestal e Produtos de Origem Vegetal	
URL: 	http://ainfo.cnptia.embrapa.br/digital/bitstream/item/216397/1/cpafro-18445.pdf	
Registro original: 	Embrapa Rondônia (CPAF-RO)	
Exemplares: 	CPAF-RO - (18445-1) - UPC - AP - DD -  -  -  - DIS