Abstract
The aim of this study was to evaluate the decomposition and release of nutrients and carbon from leaves and pruned stems deposited in the rows and in the spacing between rows of vineyards, throughout the vegetative and productive cycle of the grapevines in a vineyard in Santana do Livramento, Southern Brazil, from May to November 2009. Senescent leaves and new stems that were pruned and enriched with 15N were collected, analyzed chemically and biochemically, and placed in litter bags, which were deposited in the vine rows and in the spacing between them. After 0, 30, 60, 90, 120, 150, 180, and 210 days of the deposition of the litter bags, these residues were collected, dry matter was determined, and the residues were analyzed for total contents of N, 15N, P, K, and C. The rate of decomposition and release of C and nutrients from the leaves and pruned stems deposited on the soil surface was not affected by the place of deposition, row or spacing between rows, of the grapevines. The rate of decomposition and release of C and nutrients from the leaves deposited in the row and in between rows of the vineyard was greater than that of the pruned stems throughout the period evaluated.
Highlights
The vineyards of the Pampa Biome of Rio Grande do Sul (RS), Brazil, near the border with Uruguay, are generally established on flat or slightly wavy land and on soils with sandy surface texture that are acidic and of low natural fertility
In the grapevine plant rows, as opposed to between the rows, modifications are expected in factors such as soil temperature and evaporation and, modifications in water availability to plants, which may reduce microbial activity in the soil (Gama-Rodrigues et al, 2007; Gömöryová et al, 2013; Kakumanu & Williams, 2014)
The quantity of dry matter (DM), C, and K, and the excess of 15N were similar in all the collections made for the leaves and pruned stems deposited in the plant row and between the plant rows of the vines (Table 3)
Summary
The vineyards of the Pampa Biome of Rio Grande do Sul (RS), Brazil, near the border with Uruguay, are generally established on flat or slightly wavy land and on soils with sandy surface texture that are acidic and of low natural fertility. In the grapevine plant rows, as opposed to between the rows, modifications are expected in factors such as soil temperature and evaporation and, modifications in water availability to plants, which may reduce microbial activity in the soil (Gama-Rodrigues et al, 2007; Gömöryová et al, 2013; Kakumanu & Williams, 2014). The combination of these factors may delay decomposition and release of nutrients and carbon (C) from the litter derived from winter pruning and deposited on the soil surface. This litter may remain for a longer time on the soil surface in the plant row, which is desirable, because this may reduce water erosion and slow release of nutrients, increasing synchronism with uptake on the part of the grapevines
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
