Título:	Redistribution of phosphorus in soil through cover crop roots.
Autoria:	FRANCHINI, J. C. PAVAN, M. A. MIYAZAWA, M.
Afiliação:	JULIO CEZAR FRANCHINI DOS SANTOS, CNPSO.
Ano de publicação:	2004
Referência:	Brazilian Archives of Biology and Technology, v. 47, n. 3, p. 381-386, July 2004.
Conteúdo:	The objective of this study was to evaluate if cover crops can absorb P from the upper layers and transport it in their roots to subsoil layers. Samples of an Oxisol were placed in PVC columns. Super phosphate fertilizer was applied to the 0-10 cm soil surface layers. The cover crops tested were: Avena strigosa, Avena sativa, Secale cereale, Pisum sativum subsp arvense, Pisum sativum, Vicia villosa, Vicia sativa, Lupinus angustifoliu, Lupinus albus, and Triticum aestivum. After a growth period of 80 days the cover crop shoots were cut off and the soil was divided into 10cm layers and the roots of each layer were washed out. The roots and shoots were analyzed separated for total P contribution to the soil. Considerable amount of P was present in the roots of cover crops. Vicia sativa contained more than 60% of total plant P in the roots. The contribution of Vicia sativa to soil P bellow the fertilized zone was about 7 kg ha-1. It thus appeared that there existed a possibility of P redistribution into the soil under no tillage by using cover crops in rotation with cash crops. Vicia sativa was the most efficient cover crop species as P carrier into the roots from superficial layer to lower layers.
Thesagro:	Adubação Verde Fósforo Plantio Direto Solo
NAL Thesaurus:	Roots Phosphorus
Digital Object Identifier:	10.1590/S1516-89132004000300007
Tipo do material:	Artigo de periódico
Acesso:	openAccess
Aparece nas coleções:	Artigo em periódico indexado (CNPSO)