Resumo

RUIZ SILVERA, Carlos; URDANETA, July; BORGES, Jorge  e  VERDE, Omar. Agronomic response of sugarcane varieties with potential forage value under different harvesting intervals in Yaracuy, Venezuela. Zootecnia Trop. [online]. 2009, vol.27, n.2, pp.143-150. ISSN 0798-7269.

A field trial was conducted in Yaracuy, Venezuela, to determine the agronomics response of experimental sugarcane cultivars at different harvesting intervals and identify their potential value as cattle forage. The following growing parameters were evaluated: plant height (AP), stalks number per meter (NT), leaf:stalk ratio (RHT), green biomass per ha (BV) and adjusted per year (BVaj), dry biomass per ha (BS), and adjusted per year (BSaj). Fourteen sugarcane cultivars and four harvesting intervals (3, 4, 6, and 10 months) were tested. The effect of harvesting interval and cultivar was detected on AP, NT, BV, and BS. Also, and effect of harvesting interval was observed on RHT, BVaj, and BSaj. Plant height (AP = 2.90 m), BVaj (113.8 t FM ha-1 year-1), and BSaj (59.8 t DM ha-1 year-1) were higher at 10 month interval. NT (16.32 stalks/m) and RHT (0.97) were higher at four month interval. V 99-6, V 99-8 y V 99-262 showed the best agronomic responses among the experimental sugarcane cultivars evaluated.

Palavras-chave : Saccharum spp; forage; harvesting intervals; agronomic response; biomass.

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