Pertumbuhan Dan Hasil Beberapa Varietas Jagung Pada Berbagai Jarak Tanam

This study was aimed to determine the effect of varieties and spaces of planting on growth and yield of maize, using a split plot design with three replications. Main plots were V1 (Local), V2 (Bisma), V3 (Bisi 10) and V4 (P 21), and subplots were planting spacing, i.e. K1 (30 cm x 40 cm), K2 (40 cm x 40 cm), K3 (50 cm x 40 cm), K4 (60 cm x 40 cm), K5 (70 cm x 40 cm). Variety significantly affected on plant height at the age of 2-8 weeks after planting, whereas the total leaf area was significantly affected on the age of 2, 4 and 6 weeks after planting. Dry weight of plants was significantly affected at the age of 4 and 8 weeks after planting. Net assimilation rate was significantly affected at the age of 2-4 weeks after planting. Spacing treatments significantly affected on plant height at the age of 4, 6 and 8 weeks after planting. Grain yield increased from 1,081 kg to 5,249 kg/ha with an increase of plant spacing from 30 cm x 40 cm to 70 cm x 40 cm. Hybrid variety produced yield higher than that of open pollinated ones. The highest productivity as much as 7,994 kg/ha was obtained by hybrid P 21 with the plant spacing of 50 x 40 cm, followed by hybrid Bisi 10 (7,508 kg/ha), local variety (5,803 kg/ha), Bisma (5,345 kg/ha) with the same plant spacing of 50 cm x 40 cm