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Growth and yield response of two hybrid rice cultivars to ATONIK plant growth regulator in a Tropical environment

Ben Kwaku Banful 1  ,  
Daniel Attivor 2
 
1
Kwame Nkrumah University of Science and Technology, University Post Office, Private mailbag, Kumasi, Ghana
2
Calli Ghana Company Limited, P.O.Box TT 503 Tema, Ghana
Environ. Earth Ecol. 2017;1(1):33-45
DOI: https://doi.org/10.24051/eee/69223
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References (30)
 
KEYWORDS
plant growth regulator, rice, vegetative growth, yield
TOPICS
Agronomy, Plant production
ABSTRACT
A study was conducted at the Department of Horticulture, KNUST, Kumasi from June to November, 2015 with the objectives to (i) determine the rate of ATONIK plant growth regulator (PGR) suitable for high yield of two varieties of hybrid rice (ii) determine the combined effects of PGR rates and varieties on the growth and yield performance of hybrid rice. A 2 x 5 factorial arrangement in randomized complete block design with three replications was used. The factors were varieties at two levels: Agra Rice and Jasmine 85 and PGR at five levels: ATONIK at 450 ml/ha, ATONIK at 500 ml/ha, ATONIK at 550 ml/ha, ATONIK at 0 ml/ha and GA3 at 60 ml/ha. Comparing the ATONIK rates with the GA3, ATONIK at 450 ml/ha resulted in a 14.3 % increase in the number of rice panicles. Application of ATONIK at 450 ml/ha, 500 ml/ha and 550 ml/ha resulted in 14.4%, 10.7% and 4.4% higher percentage of productive tillers, respectively, than that produced by GA3 at 60 ml/ha. ATONIK at 450 ml/ha application led to a 17.8 % increase in grain yield. For the harvest index, application of ATONIK at 450 ml/ha resulted in the highest harvest index of 45 %, significantly greater than the other PGR treatments. In conclusion, the study clearly demonstrated that ATONIK PGR was superior to GA3 in the vegetative and productive performance of rice. The most suitable rate of ATONIK for increased rice productivity was 450 ml/ha.
Corresponding author
Ben Kwaku Banful   
Kwame Nkrumah University of Science and Technology, University Post Office, Private mailbag, Kumasi, Ghana
 
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