Physiological studies on pearl millet as affected by hybrids, plant density and fertility levels in semi arid environment

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A field experiment was conducted at crop research farm, Chaudhary Charan Singh Haryana Agricultural University, Hisar, during the kharif seasons of 2004 and 2005 to find out suitable spacing for pearl millet hybrids along with N & P levels so as to increase the productivity of pearl millet. The experiment was laid out in split plot design allocating two hybrids and three plant densities in main plots and four fertility levels in sub plots replicated thrice. HHB-67-2 showed significantly higher dry matter accumulation plant-1 (9.65 %) at harvest, leaf area plant-1 (9.34 %) at 55 DAS, leaf area index (8.87 %) and leaf area duration (9.65 %) at 41 to 55 DAS and crop growth rate (8.00) at 56 DAS to harvest over HHB-67 in first year. The fertility level 90 kg N + 45 kg P2O5 ha-1 recorded significantly higher dry matter accumulation plant-1, leaf area plant-1, leaf area duration and crop growth rate over control and 30 kg N + 15 kg P2O5 in both the crop seasons. Hybrid HHB 67-2 recorded significantly higher biological yield over HHB-67 in both the seasons. However 60 kg N + 30kg P2O5 ha-1 caused significant difference in biological yield over control and 30 kg N + 15 kg P2O5 ha-1 +. HHB 67-2 recorded relatively higher value for consumptive water use and water use efficiency. The plant density of 45 × 12 cm produced significantly higher biological yield in both the seasons over 30 × 12 and 60 × 12 cm densities.
日本熱帯生態学会の論文