Abstract
The behavior of variables related to defoliation dynamics was evaluated, and their respective oscillations in two intercropping of tropical climate grasses managed under two grazing intensities. We used pastures formed with two intercropping (BRS Zuri, Xaraés and Basilisk; BRS Quênia, Marandu and BRS Paiaguás), managed in two grazing intensities: 40 and 60% of the pre-grazing height. In the consortium between BRS Zuri, Xaraés and Basilisk, the first canonical variable explained 72.1 and 79.2% of the total variation of the defoliation pattern for the grazing intensity levels of 40 and 60%. In the consortium between BRS Quênia, Marandu and BRS Paiaguás, the first canonical variable explained 84.3 and 89.0% of the total variation of the defoliation pattern for the grazing intensity levels of 40 and 60%. The choice of forage species of tropical climate to form the consortium may be decisive in order to perpetuate plant diversity. From the population density of tillers, it is possible to observe that grasses belonging to functional groups A and B (Zuri, Xaraés, BRS Quênia and Marandu) have a higher probability of coexisting in the same area. The choice of forage species for the establishment of intercropped pastures is important to ensure the coexistence between them and the persistence of the consortium. The analysis of canonical variables assists in explaining the dynamics of defoliation of intercropping through the estimates of severity and frequency of defoliation of extended tiller and pseudostem.
Highlights
The behavior of variables related to defoliation dynamics was evaluated, and their respective oscillations in two intercropping of tropical climate grasses managed under two grazing intensities
Grazing management can be determinant in defoliation dynamics in higher grazing intensities, because they are usually related to higher stocking rates, which can reduce defoliation depth and increase the frequency of defoliation in the same tiller (Mazzanti et al, 1994)
The behavior of the variables related to defoliation dynamics was evaluated, and their respective oscillations in two intercropping of tropical climate grasses were managed under two grazing intensities
Summary
Xaraés (Euclides et al, 2008); functional group C, grasses with high survival rate of tillers, represented by Brachiaria decumbens cv. Grazing management can be determinant in defoliation dynamics in higher grazing intensities, because they are usually related to higher stocking rates, which can reduce defoliation depth and increase the frequency of defoliation in the same tiller (Mazzanti et al, 1994). It can generate balance in the process of search and seizure of forage in a heterogeneous pasture. The behavior of the variables related to defoliation dynamics was evaluated, and their respective oscillations in two intercropping of tropical climate grasses were managed under two grazing intensities
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