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Nutrient uptake and use efficiency of wheat and triticale genotypes under low and optimum input conditions

KrishiKosh

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Title Nutrient uptake and use efficiency of wheat and triticale genotypes under low and optimum input conditions
 
Creator Vats, Akshay Kumar
 
Contributor Dhanda, S.S.
 
Subject Genotypes, Wheats, Grain, Yields, Planting, Developmental stages, Biological phenomena, Nitrogen, Genetics, Fertilizers
 
Description The objectives of present investigation were to study the genotypes of wheat (T.aestivum, T.durum, synthetics and
triticale) for various characters under low and optimum input conditions, to determine the genotypic and phenotypic variability
and indices of yield and its components for nutrient uptake and use efficiency. Results revealed that the mean squares due to
genotypes were significant for all the characters except for spikelets per spike. Genotype × fertilizer (G × F) interaction was
significant for majority of the characters in T.aestivum, T. durum, triticale and synthetics. Correlation coefficients revealed that
the genotypes having high grain yield also had more tillers per plant, high 100–grain weight, lower plant height and high harvest
index under both optimum and low input conditions. But the correlations of grain yield with grains per spike and biological
yield was not similar under both conditions, the grains per spike was important component of grain yield under optimum input
conditions, while biological yield under low input conditions. This may be due to the fact that some genotypes adaptable to low
input conditions might have more responded fertilizer dose by increasing the vegetative phase and decreasing the productive
phase under optimum input conditions leading to non-significant correlations with biological yield. The grains per spike and
tillers per plant were contributed more towards grain yield under optimum input conditions, while biological yield was more
important under low input conditions. The mean performance of genotypes for N content in grains in various groups from low to
optimum input conditions was the highest in T.aestivum group followed by T.durum group, triticale group and synthetic wheat
group. The mean performance of the genotypes for P content in grains from low to optimum input conditions in various groups
was the highest in T.aestivum group followed by synthetic wheat group, T.durum group and triticale group. The genotypes Lok1
in T.aestivum group, P 7531 in T.durum group, TL 2968 in triticale group and Syn 24 in synthetic wheat group were highly
responsive for Zn content in grains. With regard to their comparative response for nitrogen use efficiency from low to optimum
input conditions, T.durum had the highest mean response followed by triticale then synthetic wheat and T. aestivum. With regard
to phosphorous use efficiency, percentage of response from low input to optimum input conditions. T. aestivum had the highest
response followed by synthetic wheat, triticale and T. durum. With regard to response of zinc from low to optimum input
conditions, T. aestivum had the highest response followed by synthetic wheat, triticale and durum. The T.aestivum group in
general had better response followed by synthetics, triticale and durum groups for Nitrogen, phosphorous and Zinc use
efficiencies, which may probably be due to high selection pressure on T.aestivum and T.durum for fertilizer responsiveness.
 
Date 2016-11-10T08:35:05Z
2016-11-10T08:35:05Z
2011
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/84782
 
Language en
 
Format application/pdf
 
Publisher CCSHAU