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Influence of corn (Zea mays L.) cultivar development on residue production

Abstract::: The amount and composition of crop residues added to soil in agroecosystems can influence decomposition processes and soil organic matter levels. This study aimed to evaluate residues (quantity and quality) of different corn cultivars commonly used in Brazilian cropping systems. The experiment was conducted for two seasons (2005/2006 and 2006/2007) in Rolândia, Paraná State, Brazil. Ten corn cultivars that represent five degrees of breeding development (i.e., landrace, commercial variety, double cross, triple cross, and single cross hybrids) were evaluated. At harvest, carbon (C) and nitrogen (N) of non-yield residue and grain were determined. Except for grain C, other measures (grain N concentration, residue C and N concentration, and C:N ratio) varied among cultivars. In general, the hybrids had higher residue C and lower residue N concentrations than the landraces and commercial varieties. Findings suggest that breeding selection may have altered residue production and composition, which may influence soil C dynamics.
Author(s):: Santos, Nicolas Z. dos , Prior, Stephen A. , Gabardo, Juarez , Valaski, Julio C. , Motta, Antonio C.V. , Ferreira Neto, Antonio
Subject(s):: Zea mays , carbon , carbon nitrogen ratio , corn , crop residues , cropping systems , crossing , cultivars , hybrids , landraces , nitrogen , nitrogen content , plant breeding , soil nutrient dynamics , soil organic carbon , Brazil
Description:: Includes references
Source:: Journal of plant nutrition 2012, v. 35, no. 5
Language:: English
Year:: 2012
Collection:: Journal Articles, USDA Authors, Peer-Reviewed
File:: Download [PDF]
Rights:: Works produced by employees of the U.S. Government as part of their official duties are not copyrighted within the U.S. The content of this document is not copyrighted.