Effect of nitrogen fertilizer and planting density on forage production, grain yield and nutrients of Shorgum bicolor (L.) plant for animal feeds in Gialam-Ha Noi
2011
Pham Van Cuong; Nguyen Xuan Tranh; Do thi Thu Huyen
The experiment was conducted to estimate the effect of N fertilizer level (0, 180, 220 and 260 kg/ha) together with different planting density (4.8, 6,7 and 11.1 plant m2) on forage production at 4 cutting times, grain yield and their nutrients of shorgum cultivar S21 for animal feed. the result showed that as increasing N fertilizers, all characters, viz, plant height, number of tillers per plant, leaf area index and forage production were significantly increased, especially at first cutting and grain harvesting times. As increasing N fertilizer from 180 to 260kg N per ha, the average total forage production increased from 119.8 ton per ha to 185.9 ton per ha and the average grain yield significantly increased from 2.32 ton per ha to 3.72 ton per ha. Under all N fertilizer level, both forage production and grain yield were increased as higher planting density. Both the highest total forage production (208.9 ton per ha) and grain yield (4.17 ton per/ha) were obtained when planting with 11.1 plant/m2 and applying 260 kg N per ha. Higher N fertilizer increased leaf and stem nutrient such as protein, lipid and HCN content, whereas decreased ash content. High plating density can reduced HCN content in leaf and stem
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