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Yield response of sorghum cultivars to inorganic nitrogen fertilizer

Published online by Cambridge University Press:  27 March 2009

U. R. Pal ,
K. Murari  and
H. S. Malik
U. R. Pal
Affiliation:
G. B. Pant University of Agriculture and Technology, Pantnagar — 263145, India
K. Murari
Affiliation:
G. B. Pant University of Agriculture and Technology, Pantnagar — 263145, India
H. S. Malik
Affiliation:
G. B. Pant University of Agriculture and Technology, Pantnagar — 263145, India
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Summary

Field experiments were conducted during the rainy seasons (June–October) of 1978 and 1979 in order to determine the effect of fertilizer N rates (0, 40, 80 and 120 kg N/ha) on yield and yield attributes of some new sorghum cultivars in northern India. Sorghum hybrid varieties yielded more than pure line varieties, hybrid CSH 5 outyielding all other cultivars including other hybrid varieties because of its greatest number of grains per panicle. Nitrogen application at 80 or 120 kg N/ha brought about significant improvement in number of grains per panicle and yield per ha.

Cultivar Χ N rate interactions were significant, in affecting the yield per ha and number of grains per panicle in 1978, whereas such differential response of sorghum cultivars to N rates did not occur in 1979. Sorghum hybrid varieties, even at lower N rates, produced identical yields to the pure line varieties supplied with higher N rates.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 102 , Issue 1 , February 1984 , pp. 7 - 10
Copyright
Copyright © Cambridge University Press 1984

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References

All India Coordinated Sorghum Improvement Project (1978). Annual Report. New Delhi: Indian Council of Agricultural Research.Google Scholar
All India Coordinated Sorghum Improvement Project (1979). Annual Report. New Delhi: Indian Council of Agricultural Research.Google Scholar
Pal, U. R., Singh, V. P., Singh, R. & Verma, S. S. (1983). Growth rate, yield and nitrogen uptake response of grain sorghum (Sorghum bicolor (L.) Moench) to nitrogen rates in humid sub-tropics. Fertilizer Research 4, 3–12.CrossRefGoogle Scholar
Pal, U. R., Upadhyay, U. C., Singh, S. P. & Umrani, N. K. (1982). Mineral nutrition and fertilizer response of grain sorghum in India – a review over the last 25 years. Fertilizer Research 3, 141–159.CrossRefGoogle Scholar