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The effects of irrigation intervals and methods of N application on some quantitative & qualitative characteristics of forage sorghum
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Abstract: (3420 Views) |
| An experiment was conducted in 1994 in Karaj, Seed and Plant improvement Institute to study the effects of irrigation intervals and methods of N application on the yield and some qualitative and quantitative characteristics of forage sorghum (Sorghum bicolor (L) Moench var. speed feed). A split plot in time & site design with four replications was used the irrigation intervals (every 7, 12, 17 and 22 days) were the main plots. Each main plot was sub-divided into three sub-plots for assigning the methods of N application. i. e. M1 = 1/2 of N applied when the plants had 5 to 7 leaves and the other half after the first harvest. M2 = 1/3 of N at 5 to 7 leaves stage, 1/3 of N when the plants had 30 - 40 cm height and the last 1/3 of N after the first harvest. M3 = 1/3 of N at 5 to 7 leaves stage, 1/3 of N after the first harvest and 1/3 of N when the height of regrown was about
30-40 cm. Results showed that 7 and 12 days intervals for imigation and M2, M3 methods of N application provided better conditions for crop development and growth, because the crop used environmental factors better than the other treatments. The most characteristics in M2 and M3 distribution of N were better than M1. It was concluded that, if the crop is sown in time, the 10 - 12 days of irrigation intervals and splitting nitrogen applications at two growth stages (M2 or M3) of sorghum is recommended for Karaj region. |
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| Keywords: Forage sorghum (Sorghum bicolor (L) Moench), irrigation intervals, N application, Dry matter yield. |
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Full-Text [PDF 210 kb]
(992 Downloads)
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Type of Study: Scientific & Research |
Subject:
Special
Received: 2015/03/2 | Accepted: 2015/03/2 | Published: 2015/03/2
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