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In situ dry matter and crude protein disappearance dynamics in stockpiled limpograss
Corresponding Author
Marcelo O. Wallau
Agronomy Dep., Univ. of Florida, Gainesville, FL, 32611-0500 USA
Correspondence
Marcelo O. Wallau, Agronomy Dep., Univ. of Florida, Gainesville, FL 32611-0500, USA.
Email: [email protected]
Search for more papers by this authorJoão M.B. Vendramini
Range Cattle Research and Education Center, Univ. of Florida, 3401 Experiment Station, Ona, FL, 33865 USA
Search for more papers by this authorLynn E. Sollenberger
Agronomy Dep., Univ. of Florida, Gainesville, FL, 32611-0500 USA
Search for more papers by this authorEdzard van Santen
Agronomy Dep., Univ. of Florida, Gainesville, FL, 32611-0500 USA
Search for more papers by this authorAndre D. Aguiar
Range Cattle Research and Education Center, Univ. of Florida, 3401 Experiment Station, Ona, FL, 33865 USA
Search for more papers by this authorOdislei F. R. Cunha
Range Cattle Research and Education Center, Univ. of Florida, 3401 Experiment Station, Ona, FL, 33865 USA
Search for more papers by this authorCorresponding Author
Marcelo O. Wallau
Agronomy Dep., Univ. of Florida, Gainesville, FL, 32611-0500 USA
Correspondence
Marcelo O. Wallau, Agronomy Dep., Univ. of Florida, Gainesville, FL 32611-0500, USA.
Email: [email protected]
Search for more papers by this authorJoão M.B. Vendramini
Range Cattle Research and Education Center, Univ. of Florida, 3401 Experiment Station, Ona, FL, 33865 USA
Search for more papers by this authorLynn E. Sollenberger
Agronomy Dep., Univ. of Florida, Gainesville, FL, 32611-0500 USA
Search for more papers by this authorEdzard van Santen
Agronomy Dep., Univ. of Florida, Gainesville, FL, 32611-0500 USA
Search for more papers by this authorAndre D. Aguiar
Range Cattle Research and Education Center, Univ. of Florida, 3401 Experiment Station, Ona, FL, 33865 USA
Search for more papers by this authorOdislei F. R. Cunha
Range Cattle Research and Education Center, Univ. of Florida, 3401 Experiment Station, Ona, FL, 33865 USA
Search for more papers by this authorAssigned to Associate Editor Miguel Castillo.
Abstract
Stockpiling warm-season perennial grasses for winter grazing is an important management practice for beef cattle production systems in tropical and subtropical regions. Limpograss [Hemarthria altissima (Poir.) Stapf et C.E. Hubb.] has greater digestibility at late maturity than other commonly used warm-season perennial grasses; however, decreased crude protein (CP) concentration may limit livestock performance. The objective of this study was to evaluate the in situ dry matter (DM) and CP ruminal disappearance kinetics of stockpiled limpograss herbage. Forage for the in situ study derived from a 2-yr field experiment in which treatments were the factorial combinations of three cultivars (‘Kenhy’, ‘Gibtuck’, or ‘Floralta’) and three stockpiling periods (8, 12, or 16 wk) distributed in three replicates of a randomized complete block design. Effective degradability of DM was greater for Kenhy and Gibtuck compared with Floralta (614 and 611 vs. 575 g kg−1), and it declined linearly as stockpiling period increased from 8 to 16 wk (623 vs. 586 g kg−1). Herbage CP concentration (48–32 g kg−1 DM) also declined linearly from 8 to 16 wk, but rumen-unavailable CP increased during stockpiling (257–438 g kg−1 CP), causing effective CP degradability to decrease (637–489 g kg−1 CP). Limpograss is a good option for stockpiled forage, and both new releases outperformed Floralta; however, concentration and availability of CP must be considered when defining a supplementation strategy.
CONFLICT OF INTEREST
The authors declare no conflict of interest.
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