THE EFFECT OF NITROGEN LEVELS AND SOURCES ON YIELD, YIELD COMPONENTS AND OTHER AGRONOMIC CHARACTERS OF TWO SORGHUM (Sorghum bicolor (L) Moench) VARIETIES.
THE EFFECT OF NITROGEN LEVELS AND SOURCES ON YIELD, YIELD COMPONENTS AND OTHER AGRONOMIC CHARACTERS OF TWO SORGHUM (Sorghum bicolor (L) Moench) VARIETIES.
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Date
1995-01
Authors
IBRAHIM, AHMED
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Abstract
A field experiment was conducted in 1992 wet season, on the
farm of Institute for Agricultural Research Samaru(ll° 11' N 07°
38' E),to evalute the effect of level and sources of nitrogen on
yield, yield components and other agronomic characters of two
sorghum varieties.
The result of the trial, indicated a significant response to
different level of nitrogen but not to the sources of nitrogen
applied. Irrespective of the nitrogen source, the rate of 60kg N/ha
appeared to be the optimum rate for the two sorghum varieties
evaluated. Variety SAMSORG 17 (SK 5912) was found to out-yielded
SAMSORG 16 by 14.8%, even though this difference was not
significant. There was no significant effect of nitrogen source on
either the yield or yield components and other agronomic characters
of the two sorghum varieties.
A correlation studies showed that leaf area per plant, leaf
area index, stem and leaf dry weight, plant height all at 10 WAS
panicle weight, stover weight and 1000 grain weight were all
possitively correlated with the grain yield of the sorghum
varieties. Grain crude protein percentage was however, found to be
negatively associated with the grain yield of sorghum. A
regression analysis was carried out to see the effect of different
levels of nitrogen applied to grain yield of the sorghum varieties.
The result of the analysis is fitted to a quadratic response which
is represented by an equation y = 298.4 + 9.31x - 0.03 9x2. The curve
of the regression analysis indicated a maximum level of nitrogen
for highest grain yield to be 119.35 Kg N/ha
Description
A thesis submitted to the Postgraduate School, Ahmadu Bello
University, in partial fulfilment of the requirements for the
Degree of Master of Science in Agronomy.
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DEPARTMENT OF AGRONOMY
FACULTY OF AGRICULTURE
AHMADU BELLO UNIVERSITY
ZARIA, NIGERIA.
JANUARY 1995
Keywords
NITROGEN LEVELS,, SOURCES,, COMPONENTS,, AGRONOMIC CHARACTERS,, TWO SORGHUM,, (Sorghum bicolor (L) Moench),, VARIETIES.