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International Journal of Agricultural Research
  Year: 2022 | Volume: 17 | Issue: 4 | Page No.: 201-209
DOI: 10.3923/ijar.2022.201.209
 
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Performance Evaluation of Newly Developed Tea (Camellia sinensis L.) Cultivars in Response to Different Levels of Nitrogen Fertilizer

R.K.A. Amali, N.H.A.S. Abeyweera, O.G.K.A. Gunaratne, G.P. Gunaratne and J.D. Kottawa-Arachchi

Abstract:
Background and Objective: The necessity of assessing responses of tea cultivars to variable nitrogen (N) application has been emphasized to ensure the selection of suitable cultivars with improved N utilization. This study was conducted in the central highlands of Sri Lanka to determine the effects of N rates (0, 120, 240 and 360 kg N/ha/year) on yield, yield components, leaf N content and Agronomic Nitrogen Use Efficiency (AgNUE) of newly developed tea cultivars (VP 80/05, VP 80/89, VP 80/208 and VP 80/272). Materials and Methods: This experiment was carried out in a split-plot design, where cultivar as the main factor and N rates as the subfactor with three replications. Cultivar variation was significant for all the traits studied and interestingly, VP 80/272 was superior in all traits, followed by VP 80/89. However, shoot dry weight showed no significant increment in varying N applications. Results: There was no significant interaction between cultivars and N rates on the traits studied. The highest performance in AgNUE was recorded in cultivar VP 80/89. Cultivar studied could be categorized into two main clusters, one with VP 80/272 and VP 80/89, which showed better efficiency in N utilization. Importantly, cultivar variation in N response was detected. Conclusion: Therefore, exploiting this type of screening technique in the tea breeding program will enable plant breeders to select cultivars that show a consistent yield and efficient N fertilizer usage.
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How to cite this article:

R.K.A. Amali, N.H.A.S. Abeyweera, O.G.K.A. Gunaratne, G.P. Gunaratne and J.D. Kottawa-Arachchi, 2022. Performance Evaluation of Newly Developed Tea (Camellia sinensis L.) Cultivars in Response to Different Levels of Nitrogen Fertilizer. International Journal of Agricultural Research, 17: 201-209.

DOI: 10.3923/ijar.2022.201.209

URL: https://scialert.net/abstract/?doi=ijar.2022.201.209

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