Miri, K. and Rana , D.S. and Rana, K.S. and Kumar, A. (2012) Productivity, nitrogen-use efficiency and economics of sweet sorghum (Sorghum bicolour) genotypes as influenced by different levels of nitrogen. Indian Journal of Agronomy, 57 (1). pp. 49-54.
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Abstract
A field experiment was conducted at New Delhi, during rainy seasons of 2009 and 2010 to evaluate 3 sweet sorghum {Sorghum bicolour (L.) Monech} genotypes (‘RSSV 9’, ‘SSV 84’ and hybrid ‘CSH 22 SS’) under four nitrogen levels (0, 50, 100 and 150 kg N/ha) for productivity of ethanol, grain and fodder, nitrogen-use efficiency and economics of production. Results pooled over two years indicated that stalk yield (75.3 t/ha) and fodder yield (16.0 t/ha) recorded significant increase only up to 100 kg N/ha, while fermentable sugar (4.34 t/ha), estimated ethanol (2.46 KL/ha) and grain yields (2.6 t/ha) responded up to 150 kg N/ha. Hybrid ‘CSH 22 SS’ recorded 28, 40, 34, 34, 33 and 26% higher stalks (85.6 t/ha), juice (30 KL/ha), fermentable sugar (4.6 t/ha), estimated ethanol (2.6 KL/ha), grain (2.4 t/ha and fodder (16.8 t/ha) yields than genotype ‘RSSV 9’ and 57, 110, 112, 112, 41 and 46% than genotype ‘SSV 84’. Sorghum grain equivalent (11.1 t/ha) based on ethanol, grain and fodder yields recorded with 150 kg N/ha was significantly higher over 100 kg N/ha. Hybrid ‘CSH 22 SS’ recorded significantly higher sorghum grain equivalent yield (11.35 t/ha), when compared to ‘SSV 84’ (6.15 t/ha) and ‘RSSV 9’ (8.53 t/ha). Nitrogen-use efficiencies like partial factor productivity, agronomic nitrogen-use efficiency and crop recovery efficiency decreased with increasing dose of nitrogen. ‘CSH 22 SS’ had the highest agronomic nitrogen-use efficiency (14.5 kg grain/kg N applied) and partial factor productivity (30.7 kg/kg N applied) followed by ‘RSSV 9’. Maximum gross returns (101,410), net returns (55,670) and net B:C ratio (1.17) were recorded with application of 150 kg N/ha. ‘CSH 22 SS’ produced the highest net returns (55,900), which was (105 and 39% higher over ‘SSV 84’ and ‘RSSV 9’, respectively. Application of 150 kg N with ‘CSH 22 SS’ produced the highest values of juice yield (40KL/ha), estimated ethanol yield (3.47 KL/ha) and grain yield (3.3 t/ha).
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | Economics, Ethanol yield, Genotypes, Grain yield, Nitrogen-use efficiency, Sweet sorghum |
| Author Affiliation: | Indian Agricultural Research Institute, New Delhi, 110 012 |
| Subjects: | Plant Production Crop Improvement |
| Divisions: | Pigeonpea Sorghum |
| Depositing User: | Mr B Krishnamurthy |
| Date Deposited: | 17 May 2013 06:23 |
| Last Modified: | 17 May 2013 06:23 |
| Official URL: | http://www.indianjournals.com/ijor.aspx?target=ijo... |
| URI: | http://eprints.icrisat.ac.in/id/eprint/10556 |
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