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International Journal of Current Microbiology and Applied Sciences (IJCMAS)
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National Academy of Agricultural Sciences (NAAS)
NAAS Score: *5.38 (2020)
[Effective from January 1, 2020]
For more details click here

ICV 2018: 95.39
Index Copernicus ICI Journals Master List 2018 - IJCMAS--ICV 2018: 95.39
For more details click here

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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706
Issues : 12 per year
Publisher : Excellent Publishers
Email : editorijcmas@gmail.com / submit@ijcmas.com
Editor-in-chief: Dr.M.Prakash
Index Copernicus ICV 2018: 95.39
NAAS RATING 2020: 5.38

Int.J.Curr.Microbiol.App.Sci.2018.7(7): 2430-2437
DOI: https://doi.org/10.20546/ijcmas.2018.707.284


Comparison of Nitrogen use Efficiency and its Variation among Rice Cultivars of Manipur, India
Joylata Laishram1*, K.G. Saxena1 and Ng. Piloo2
1School of Environmental Sciences, Jawaharlal Nehru University, New Delhi 110067, India
2College of Horticulture and Forestry, Central Agricultural University, Pasighat, Arunachal Pradesh, India
*Corresponding author
Abstract:

Nitrogen use efficiency is considered as one of the most yield limiting factor for the rice production in all the rice growing regions of the world. This experiment was conducted to investigate the variation in nitrogen use efficiency of rice cultivars, the selection of rice cultivars with high nitrogen use efficiency, and the relationships of nitrogen use efficiency with the growth characteristics under non-limiting conditions of factors like water, fertilizer inputs. Variation in nitrogen use efficiency of rice cultivars was very low in 2010 (33.82 to 37.22) and in 2011 (34.38 to 38.33) but there were a high variation in nitrogen uptake efficiency was (0.55 to 0.79) and (0.56 to 0.68) for both the years and physiological utilization efficiency was (42.64 to 62.70) and (52.44 to 64.82) respectively. On average, nitrogen use efficiency of the 8 rice cultivars was 35.82 and 35.99, nitrogen uptake efficiency was 0.67 and 0.61 and physiological utilization efficiency was 54.29 and 59.45 respectively. For the year 2010, Nitrogen uptake efficiency was positively correlated with plant dry matter (0.846**) and leaf nitrogen content (0.943***) and for the year 2011, Nitrogen uptake efficiency was also positively correlated with plant dry matter (0.617) and leaf nitrogen content (0.820*). Therefore, the dry matter weight of rice plant was more important than leaf nitrogen content for characterizing nitrogen uptake efficiency and the result suggested that yield could be improved by optimizing the plant N uptake through improving the fertilizer N recovery efficiency.


Keywords: Rice/Paddy, Yield, Nitrogen use efficiency (NEU), Physiological utilization efficiency (PUE).
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How to cite this article:

Joylata Laishram, K.G. Saxena and Piloo, Ng. 2018. Comparison of Nitrogen use Efficiency and its Variation among Rice Cultivars of Manipur, India.Int.J.Curr.Microbiol.App.Sci. 7(7): 2430-2437. doi: https://doi.org/10.20546/ijcmas.2018.707.284