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Your search keyword '"Duchini, Paulo Gonçalves"' showing total 15 results
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15 results on '"Duchini, Paulo Gonçalves"'

14. CHANGES IN TILLERING DYNAMICS OF INTERCROPPED BLACK OAT AND ANNUAL RYEGRASS ENSURE A STABLE SWARD.

Author

DUCHINI, PAULO GONÇALVES, GUZATTI, GABRIELA CRISTINA, RIBEIRO-FILHO, HENRIQUE MENDONÇA NUNES, and SBRISSIA, ANDRÉ FISCHER

Abstract

SUMMARY: Mixing species with different tillering peaks may enhance pasture stability, but intercropping may also alter the plants' tillering patterns. This study aimed to evaluate tillering dynamics in black oat (Avena strigosa Schreb.) and annual ryegrass (Lolium multiflorum Lam.) pastures grown as monocultures or intercropped. Three following treatments are established: black oat and annual ryegrass pastures grown as monocultures and an intercrop composed of these two species. Tillering dynamics were measured for black oat and annual ryegrass populations separately. When intercropped, tiller birth rates of black oat decreased (20.0 vs. 28.9 tillers 100 tillers−1) and those of annual ryegrass increased (30.5 vs. 14.3 tillers 100 tillers−1), compared to their monocultures. Tiller death rates for annual ryegrass did not differ between monoculture and intercropping (23.9 tillers 100 tillers−1), but black oat presented higher mortality in monocultures (48.8 vs. 36.4 tillers 100 tillers−1). The black oat monoculture had the lowest population stability index (0.80), whereas annual ryegrass in monoculture and intercropped pastures exhibited greater values (on average, 0.92). Our results indicated that black oat and annual ryegrass present distinct tillering dynamics whether grown as monoculture or intercropped, and suggest that intercropping species with elevated death rates (black oat) with later species (annual ryegrass) could be an important tool for maintaining pasture stability throughout the growing season. [ABSTRACT FROM AUTHOR]

Published
2018
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15. Root mass vertical distribution of perennial cool-season grasses grown in pure or mixed swards.

Author

Méndez Moncada, Valentina Ylluyanka, Fidelis Américo, Luana, Duchini, Paulo Gonçalves, Guzatti, Gabriela Cristina, Schmitt, Daniel, and Sbrissia, André Fischer

Subjects
*GRASS growing, *SOIL depth, *TALL fescue, *ORCHARD grass, *TURFGRASSES, *SOIL conservation, *TOPSOIL
Abstract

In this study we tested whether the root biomass of mixtures composed by grass species is greater than their respective monocultures. The treatments were monocultures of Arrhenatherum elatius, Festuca arundinacea, Dactylis glomerata, and a mixture of them, cultivated in a rich-soil environment. Root biomass was evaluated on a single evaluation per season at three soil depths (0-5, 5-10, and 10-20 cm). Mixed swards presented the greatest root biomass, and this was explained by a greater concentration in the topsoil layer (0-5 cm). These findings reinforce the need for permanent soil conservation practices to not jeopardize the benefits of the more abundant root biomass reported in the mixed swards. [ABSTRACT FROM AUTHOR]

Published
2022
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