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Botanical Composition, Light Interception, and Carbohydrate Reserve Status of Grazed `Florakirk' Bermudagrass

Carlos G.S. Pedreiraa, Lynn E. Sollenbergerb and Paul Mislevyc

a Depto. de Producao Animal, Escola Superior de Agricultura "Luiz de Queiroz," Univ. de São Paulo (ESALQ-USP), Caixa Postal 9, Piracicaba, SP 13418-900, São Paulo, Brazil
b Agronomy Dep., P.O. Box 110300, Univ. of Florida, Gainesville, FL 32611-0300 USA
c Range Cattle Res. & Educ. Ctr., Univ. of Florida, Ona, FL, 33865 USA



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  		Fig. 1 Postgraze canopy light interception (%) in Florakirk bermudagrass pastures in 1993 and 1994 as affected by stubble height (SH). In 1993, postgraze light interception = 48 - 1.85 (SH) + 0.12 (SH)2; R2 = 0.80. In 1994, postgraze light interception = -23.6 + 8.12 (SH) - 0.16 (SH)2; R2 = 0.90

 


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  		Fig. 2 Pregraze canopy light interception (%) in Florakirk bermudagrass pastures in 1993 and 1994 as affected by length of rest period (RP) and postgraze stubble height (SH). In 1993, pregraze light interception = 22 + 2.48 (RP) + 2.09 (SH) - 0.03 (RP)2 - 0.04 (RP x SH); R2 = 0.84. In 1994, pregraze light interception = 12.3 + 1.74 (RP) + 4.09 (SH) - 0.05 (SH)2 - 0.06 (RP x SH); R2 = 0.96

 




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