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Agro-Science
Journal of Tropical Agriculture, Food, Environment and Extension
 

ISSN 1119-7455
   
 
         
 
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Article No 13 of Volume 7.3 (2008)
 
    
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GROWTH AND YIELD PERFORMANCES OF SOME UPLAND RICE (Oryza sativa L.) CULTIVARS AS INFLUENCED BY VARIED RATES OF NPK (15:15:15) FERTILIZER ON AN ULTISOL.

Ndaeyo N.U.1*, Iboko1 K.U., Harry1 G. I. and  Edem2 S. O.

1Department of Crop Science,

2Department of Soil Science, University of Uyo, Uyo, Nigeria.

*Corresponding author Email: dr_nundaeyo@yahoo.com

 

 

ABSTRACT

Field studies were conductedin 2005 and 2006  to assess the effects of different NPK (15:15:15) fertilizer rates on the growth and yield of upland rice varieties.  The experiment were conducted in a high rain forest ecology of Uyo, Akwa Ibom State, Nigeria. The treatments consisted of factorial combination of five rice varieties (WAB340-8-8-2HI, WAB881-10-37-18-8-2-HI, WAB99-1-1, WAB224-8-HB, WAB189-B-B-B-8-HB) and four rates of NPK (15:15:15) fertilizer (0, 200, 400 and 600kg/ha) laid out in a randomized complete block design and replicated three times. The results showed that 600kg/ha NPK (15:15:15) fertilizer rate significantly (P < 0.05) increased plant height, number of leaves and tillers per plant in both years. The 400kg/ha rate increased the number of panicles per plant, length of central panicle per plant and the overall grain yields over other rates by 4-32% and 2-21% in 2005 and 2006, respectively. Among the varieties, WAB224-8-HB produced the highest grain yield (4.73 and 4.40 t/ha) followed by WAB189-B-B-B-8-HB (4.37 and 4.20 t/ha) for both years. The interaction effects between rice variety and fertilizer rates were generally significant. The mean grain yield for both years showed that WAB224-8-HB variety performed better than other varieties by 6-24% while the grain yield in the 400kg/ha plot superceded other rates by 3-26% and hence have potentials to support upland rice production in Uyo agro-ecology.

 

Key words: Upland rice, NPK fertilizer, ultisol, Oryza sativa.

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Date:17/07/2018
 
     
 
 
 
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