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Revista veterinaria
On-line version ISSN 1669-6840
Abstract
PORTA, M.; HACK, C.M.; CASTELAN, M.E. and GOLLUSCIO, R.A.. Incorporación de Vicia sativa L. y fertilización fosfatada en un pastizal del nordeste argentino. Rev. vet. [online]. 2017, vol.28, n.1, pp.56-61. ISSN 1669-6840.
Megathermic grasslands constitute the main forage resource for livestock in the great chaco region. In the northeast Argentina, the main constraints for animal feeding are the low quantity and quality of forage, mainly in late winter-early spring. In addition, there are broad regions with low phosphorus content in the soil and in the forage. The aim of this study was to assess the potential of incorporating a leguminous plant and adding phosphate as fertilizer to increase legume biomass and leaf phosphorus content in a grassland poor in phosphorus from northeast Argentina (Margarita Belén, Chaco province). Vicia sativa (20 kg/ha) and calcium triple superphosphate (150 kg/ha) were incorporated in a completely randomized split-plot block design (n=3). Randomization was carried out by assigning two levels of phosphate fertilization to the main plots (with and without addition of P). Two levels of addition of V. sativa (with and without addition of V. sativa) were assigned to the secondary plots. Fertilization increased the cover and frequency of both the native and the planted legumes. The incorporation of V. sativa and the addition of P resulted in significant increases in biomass of the legumes but not in grasses. The addition of P and the addition of V. sativa had a favorable influence on the leaf phosphorus contents of legumes and grasses. These results suggest that the incorporation of V. sativa and the addition of phosphate as fertilizer haswould allow to deal with the main factors limiting the livestock activity in the region. Indeed, this practice allowed increasing the amount of available forage in late winter-early spring as well as increasing the quality of the diet, due to the increase in P, and protein content
Keywords : livestock; forage; leguminous; phosphorus; biomass production.