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Effects of Nitrogen Application on Sweet Sorghum (Sorghum bicolor (L.) Moench) in the Semi-Arid Tropical Zone of India

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Title Effects of Nitrogen Application on Sweet Sorghum (Sorghum bicolor (L.) Moench) in the Semi-Arid Tropical Zone of India
 
Creator Uchino, Hiroshi
 
Contributor Watanabe, Takeshi
Ramu, Karri
Sahrawat, Kanwar Lal
Marimuthu, Subramanian
Wani, Suhas
Ito, Osamu
 
Subject fertilizer management
spad reading
sugar yield
grain yield
 
Description Sweet sorghum is a multipurpose crop that has great potential as a bioethanol crop. To make an appreciable
profit from cultivating sweet sorghum in the semi-arid tropics (SAT), such agronomic practices
as nutrient management need to be standardized. The objective of this study is to determine optimum
nitrogen (N) rates for maximizing the grain and sugar yields of sweet sorghum during the rainy season
in the Indian SAT. During the 2009 and 2010 seasons, the response of sweet sorghum being grown
in an Alfisol to the application of six N rates (0, 30, 60, 90, 120, and 150 kg N ha-1) was evaluated in
Patancheru, Andhra Pradesh, India. The chlorophyll content (SPAD reading), cane fresh weight, and
grain dry weight increased significantly in line with higher N rates. The volume of juice also increased
significantly, although sugar content (brix reading) did not change in line with higher N rates, consequently
resulting in a significant increase in sugar yield as computed from the volume of juice and sugar
content. There were smaller differences due to N application during the season when soil fertility was
at a medium level under high air temperature. Net income, as estimated from cane fresh weight and
grain dry weight, increased at rates up to 90 kg N ha-1, and higher N rates did not significantly affect
productivity or income, but instead caused severe lodging in 150 kg N ha-1 at the harvest stage. Based
on these results, an input of 90-120 kg N ha-1 could be recommended for maximizing sweet sorghum
productivity and farmers’ income in the SAT region of India.
 
Date 2013-11-30
2017-01-05T19:41:01Z
2017-01-05T19:41:01Z
 
Type Journal Article
 
Identifier https://mel.cgiar.org/reporting/download/hash/98oTIVIv
Hiroshi Uchino, Takeshi Watanabe, Karri Ramu, Kanwar Lal Sahrawat, Subramanian Marimuthu, Suhas Wani, Osamu Ito. (30/11/2013). Effects of Nitrogen Application on Sweet Sorghum (Sorghum bicolor (L. ) Moench) in the Semi-Arid Tropical Zone of India. JARQ, 47(1), pp. 65-73.
https://hdl.handle.net/20.500.11766/5220
Open access
 
Language en
 
Rights CC-BY-NC-4.0
 
Format PDF
 
Publisher J-stage
 
Source JARQ;47,(2013) Pagination 65,73