Effect of seed proportion and nitrogen application on forage yield and nutritive value of barley-pea mixture harvested at different times
2008
Ayub, M. (University of Agriculture, Faisalabad (Pakistan). Dept. of Agronomy) | Tanveer, A. (University of Agriculture, Faisalabad (Pakistan). Dept. of Agronomy) | Nadeem, M.A. (University of Agriculture, Faisalabad (Pakistan). Dept. of Agronomy) | Tahir, M. | Ibrahim, M.
Response of barley-pea mixtures when sown at seed proportion of 100:0, 75:25 and 50:50 to nitrogen levels viz., 0 and 50 kg per ha and harvesting times of 57, 75 and 92 days after sowing was studied at the University College Farm, Aber, gwynedd, UK. Dry matter percentage, dry matter yield and protein yield were consistently increased up to the final harvest. Whereas, a significant decrease in fresh and digestible dry matter yield was observed at the third harvest. Digestible dry matter percentage was decreased significantly with delaying the harvest. The effect of harvesting time on crude protein and modified acid detergent fibre was not significant. The barley-pea seed proportion of 50:50 produced significantly higher forage, dry matter, protein and digestible dry matter yields over seed ratio of 100:0 and 75:25. Dry matter and modified acid detergent fibre percentages were decreased, whereas, crude protein and digestible dry matter percentage were increased with the addition of pea in the mixture. The application of 50 kg N per ha increased the yields and dry matter percentage. The quality parameters like crude protein, modified acid detergent fibre and digestible dry matter percentage were not affected significantly by nitrogen application. The data indicate that crude protein concentration and yield, digestible dry matter yield and digestible dry matter percentage can be increased by growing barley with pea at seed proportion of 50:50 and applying nitrogen at the rate of 50 kg per ha. The best time for harvest keeping in view both quality and yield was 75 days after sowing.
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