Effects of hybrid and row spacing on maize forage yield and quality
Iptas, S.,Gaziosmanpasa Univ., Tokat (Turkey). Faculty of Agriculture | Acar, A.A.,Aegean Agricultural Research Inst., Menemen-Izmir (Turkey)
This study was conducted to determine the effect of row spacing (40, 60 and 80 cm) on forage dry matter (DM) yield and quality of four maize hybrids grown in the years 2001 and 2002. The highest DM yield was obtained from the Arifiye (24.1 and 22.4 t/ha) while the lowest DM yield was obtained from Pioneer 3163 (19.9 and 19.8 t/ha) in the years 2001 and 2002, respectively. As row spacing increased, DM yield as an average of two years decreased from 27.2 to 16.6 t/ha. No differences were found among row spacing for DM content, harvest index and ear content. As row spacing increased, whole-plant acid detergent fiber (ADF) and neutral detergent fiber (NDF) concentrations increased from 214 to 227 g/kg and from 420 to 451 g/kg during the year 2001, respectively. However, ADF concentration decreased from 281 to 267 g/kg and NDF concentration decreased from 530 to 515 g/kg with increasing row spacing during the year 2002. In this study, hybrids showed distinct differences for crude protein, ADF and NDF concentrations in both years. Forage quality including the ADF and NDF concentrations was higher in the hybrids Pioneer 3163, TTM 8119 and Karadeniz Yildizi than in Arifiye.
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