Abstract
In no-tillage systems, oats are one of the species most used as a cover crop in the subtropical region of Brazil. This study aims is to determine a set of chemical and physical properties of five Oxisols after surface liming, and to determine whether these properties are related to the shoot dry mass production of white oat (Avena sativa L.) variety IPR Aphrodite, in order to establish a model to predict its yield.. For this purpose, a field experiment was conducted during 2015 and 2016 in Londrina County in the State of Paraná with samples of B horizon collected from five Oxisols with clay content ranging from 15-80 dag kg-1 arranged in microplots since 2004. Soil pH in CaCl2, calcium, magnesium, potassium, potential cation exchange capacity (CEC), base saturation, microporosity, total porosity, field capacity, permanent wilting point, clay and sand of the Oxisols were the parameters that most influenced the dry mass production of white oats. Oxisol extrinsic factors such as values pH and base saturation, as well as the calcium and magnesium contents, positively altered with surface liming, boosting the production of oat dry mass production.
Highlights
Oat is one of the species most used as a cover crop within the southern region of Brazil, and this use is related to this plant’s carbon and nitrogen ratio, high root volume and deep rooting in the soil profile (Muzilli, 2002)
This study aims to identify a set of chemical and physical soil attributes and to correlate them with the shoot dry mass of white oat variety IPR Afrodite to analyse the result of surface liming on the cultivation of this grass in five Oxisols
Three winter crops were grown on microplots; in the present study, only white oat cultivar IPR Afrodite was cultivated, with three replicates with additional treatment fallow plots in each soil class to study the effects of conservation practices of crop succession and liming in different soil classes on crop yield according to procedures described by Bertoni & Lombardi Neto (2010)
Summary
Oat is one of the species most used as a cover crop within the southern region of Brazil , and this use is related to this plant’s carbon and nitrogen ratio, high root volume and deep rooting in the soil profile (Muzilli, 2002). The white oat variety IPR Afrodite represents an efficient economical contribution to the production chain with probably high gians for growers (Riede et al, 2015) These authors point out that the food industry is furnished with high-quality grains for process several derivatives of this cereal, whereas shoppers have access to merchandise with higher quality , uniformity and flavour. The white oat variety IPR Afrodite showed important role for nematode management which was found to be highly resistant to species of the genus Meloidogyne but moderately susceptible to the nematode Pratylenchus brachyurus (Riede et al, 2015)
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