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Soil –tested based optimal fertilizer N recommended for sustainable sorghum (Sorghum bicolor) yield in semi-arid vertic inceptisols of Tamil Nadu

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Title Soil –tested based optimal fertilizer N recommended for sustainable sorghum (Sorghum bicolor) yield in semi-arid vertic inceptisols of Tamil Nadu
Soil –tested based optimal fertilizer N recommended for sustainable sorghum (Sorghum bicolor) yield in semi-arid vertic inceptisols of Tamil Nadu
 
Creator ICAR_CRIDA
 
Subject To study the effect of organic and inorganic, sorghum
 
Description Not Available
Seven field experiments were conducted during 1999 - 2005 (October - January) to study the effect of organic and inorganic N on soil N and yield attained under 3 blocks of sorghum (Sorghum bicolor L), cowpea (Vigna unguiculata L) and sorghum + cowpea in a semi-arid vertic inceptisol at Kovilpatti. The treatments were control; 40 kg N/ha (urea); 20 kg N/ha (urea); 25 kg N/ha (compost): 15 kg N (compost) + 10 kg N/ha (urea); 15 kg N (compost) + 20 kg N/ha (urea) 15 kg N (green leaf) + 10 kg N/ha (urea) 15 kg N (green leaf) + 20 kg N/ha (Urea); and 15 kg N (compost) + 10 kg N (green leaf). Application of 15 kg N (compost) + 20 kg N (urea)/ha gave a significantly higher mean sorghum equivalent yield of 2 210, 2 198 and 2 721 kg/ha under sorghum, cowpea and sorghum + cowpea blocks with it yield increase of 54.1, 33,8 and 44.7% over the control, respectively. It was also superior with a maximum sustainability yield index of 63.5, 28.0 and 53.5% and mean soil N of 126, 129 and 128 kg/ha over 7 years. Based on a regression model of sorghum yield over years, optimal fertilizer N was derived at varying soil N of 90 to 140 kg/ha, organic N of 0 to 20 kg/ha and crop seasonal rainfall of 100 to 300 unit for attaining maximum and economic yield. The study indicated that at a rainfall of 100 mm and organic N of 10 kg/ha, optimal fertilizer N ranged from 26 to 53 kg/ha for a soil N of 90 to 140 kg/ha. At the same level of organic N and soil N, fertilizer N ranged from 29 to 57 kg/ha at a rainfall of 200 mm and 32 to 61 kg/ha at a rainfall of 300 mm for attaining maximum yield. At the same range of soil N and organic N of 10 kg/ha, fertilizer N ranged from 20 to 52, 23 to 56 and 26 to 60 kg/ha at it rainfall of 100, 200 and 300 mm, respectively for attaining economic sorghum yield in semi-arid vertic Inceptisol.
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Date 2020-02-26T04:39:51Z
2020-02-26T04:39:51Z
2008-01-01
 
Type Technical Report
 
Identifier Not Available
Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/33209
 
Language English
 
Relation Not Available;
 
Publisher Maruthi Sankar, G. R.