Data/hora: 09/06/2024 09:21:23

Biblioteca(s): 	Embrapa Pecuária Sudeste.	
Data corrente: 	18/11/2021	
Data da última atualização: 	09/01/2024	
Autoria: 	BIELUCZYK, W.; PICCOLO, M. DE C.; PEREIRA, M. G.; LAMBAIS, G. R.; MORAES, M. T. DE; SOLTANGHEISI, A.; BERNARDI, A. C. de C.; PEZZOPANE, J. R. M.; BOSI, C.; CHERUBIN, M. R.	
Afiliação: 	WANDERLEI BIELUCZYK, USP; MARISA DE CÁSSIA PICCOLO, USP; MARCOS GERVASIO PEREIRA, UFRRJ; GEORGE RODRIGUES LAMBAIS, National Institute of Semiarid; MOACIR TUZZIN DE MORAES, Federal University of Technology-Parana; AMIN SOLTANGHEISI, Lancaster Environment Centre; ALBERTO CARLOS DE CAMPOS BERNARDI, CPPSE; JOSE RICARDO MACEDO PEZZOPANE, CPPSE; CRISTIAM BOSI, USP; MAURÍCIO ROBERTO CHERUBIN, USP.	
Título: 	Eucalyptus tree influence on spatial and temporal dynamics of fine root growth in an integrated crop livestock forestry system in southeastern Brazil.	
Ano de publicação: 	2021	
Fonte/Imprenta: 	Rhizosphere, v.1 9, sep., 2021, 100415.	
DOI: 	https://doi.org/10.1016/j.rhisph.2021.100415	
Idioma: 	Inglês	
Conteúdo: 	Integrated farming systems are promising strategies towards land-use efficiency and sustainable agriculture. The integrated crop-livestock-forestry (ICLF) system stablish complex interactions were synergies or competition depend on the arrangements throughout time and space. Fine root (&#8804;2 mm) growth dynamics of crops, pasture and trees remains unclear when these species are integrated. We aimed to assess root growth dynamics after Eucalyptus urograndis introduction into an integrated crop-livestock (ICL) system. Previous ICL area was used as a reference. We assessed ICLF 1.9, 4.3 and 7.5 m distances from tree rows, starting the study when trees had three years of age. Eucalyptus rows were spaced 15 m apart and integrated to annual crops and pasture. We evaluated the root growth under two different successional periods: (i) corn cultivation interspaced with palisade grass (Urochloa brizantha); and (ii) a pasture, when palisade grass was grazed. We tracked fine root length using the minirhizotron technique, capturing 3200 images scanning up to 70 cm soil depth. Data of photosynthetically active radiation (PAR) transmission, soil bulk density, rainfall and air temperature were used as complementary information to support the discussion. Our results showed that Eucalyptus trees impaired root growth of annual crops cultivated in the interrow position, regardless of distance from the row. From 31 to 80 days after corn germination, root length production in ICLF was reduced by 120?179 cm m&#8722;2.d&#8722;1 along the tree interrow space. For the pasture period, total produced root length density reduced 6% at 1.9 m but increased 25% at 4.3 and 7.5 m, when compared to ICL. Shade of Eucalyptus trees at ICLF 1.9 m position, with PAR transmission mainly below 60%, sharply impaired root growth. Eucalyptus roots represented 12% from total root length produced in ICLF system, and 38% of these roots had positive ectomycorrhizal status. In conclusion, under Eucalyptus trees higher than 20 m, pasture of palisade grass is more adaptable than corn when considering the root growth dynamics of our studied ICLF arrangement. Based on our findings, corn intercropped with palisade grass should not be introduced in future management of the ICLF system, unless part of the trees is chopped to reduce light competition. However, implemented pasture of palisade grass showed belowground synergies with Eucalyptus, increasing root growth in intermediary interrow positions and emerging new fungal symbiosis, which could be playing important functions in soil, as soil carbon storage and nutrient cycling.	
Palavras-Chave: 	Eucalyptus interrows; ILPF; Integrated farming systems; Minirhizotron; Root system.	
Thesaurus Nal: 	Alley cropping.	
Categoria do assunto: 	A Sistemas de Cultivo	
Registro original: 	Embrapa Pecuária Sudeste (CPPSE)	
Exemplares: 	CPPSE - (25461-1) - UPC - AP - DD - PROCI-2021.00163 - BIE - 2021.00188 - DIS