Abstract
ABSTRACT The objective of work was to study the productive profile of perennial peanut in a rotational stocking environment under different criteria. The treatments corresponded to pre-grazing height of 14 and 18cm or 95% of light interception (LI) distributed in a completely randomized design. The studied variables were forage mass, percentage of structural components, forage mass and the structural components in the lower and upper canopy strata. The entrance criterion of 18cm in height, despite having higher forage mass, presented lower percentage of leaves and higher percentage of stems and forage losses. The criteria of 14cm and 95% light interception presented similar production between them and the highest rate of forage accumulation. In all criteria, in the upper strata of pasture a higher percentage of leaves were found. The criteria of 95% LI and 14cm in height presented the best productive performances. The entry criterion of 18cm presented a higher mass of pre-grazing forage with lower percentage of dead material, but with higher forage losses, resulting from senescent leaves. Due to changes in the structural components, as grazing cycles increase, the interception of 95% of the incident light by the perennial peanut occurs at lower heights.
Highlights
Summer pastures, despite their fast growth and high forage production, normally have lower quality grass than winter pastures, so that animal performance falls below its potential
In the treatment with 95% LI entry there was a reduction in the pre-grazing height with the addition of grazing cycles, so that in the third cycle 95% light interception occurred at 10.9cm
When analyzing the interception of solar radiation and leaf area index in pre-grazing, no significant differences (P> 0.05) were found between treatments (Figure 1), agreeing with the results of Carvalho (2014) and Alonzo et al (2017), who observed interception of 95% of incident light and optimal LAI reached when the perennial peanut reached a height of 14cm
Summary
Despite their fast growth and high forage production, normally have lower quality grass than winter pastures, so that animal performance falls below its potential. The perennial peanuts (Arachis pintoi Krapov & W.C. Greg) stand out for the quality of forage and improvement of the pasture ecosystem by the biological fixation of nitrogen. Greg) stand out for the quality of forage and improvement of the pasture ecosystem by the biological fixation of nitrogen These peanuts can be used in the production of forage in isolated or consortium crops with grasses, and they provide high amount of protein for ruminants, with the potential to intensify animal production systems based on grass in a sustainable manner. In a rotational stocking environment, adequate pre- and post-grazing heights are fundamental to obtain a good yield of high-quality biomass and, efficient animal production. Amarillo) in a rotational stocking environment under different criteria for grazing by sheep
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