Physiological response of rice (Oryza sativa L.) genotypes to elevated nitrogen applied under field conditions

Plant Signaling & Behavior
Hukum SinghAlok Shukla

Abstract

Field experiment was conducted at G.B.P.U.A.T. Pantnagar, Uttarakhand, India in rainy season of 2008 and 2009 to study the impacts of increased nitrogen doses on growth dynamics, biomass partitioning, chaffy grain and nitrogen use efficiency in 4 rice genotypes viz., Vasumati, Tulsi, Kasturi and Krishna Hamsa. Four doses (N(0), N(50), N(100) and N(200) kg N ha(-1)) of nitrogen in the form of urea were applied in 3 split. Increased trend in growth dynamics during active tillering and flowering stage, and biomass partitioning at the time of active tillering and flowering stage was observed with respect to nitrogen doses. Chaffy grain number and chaffy grain weight per 5 panicles was significantly increased with enhancing nitrogen doses and was highest for Vasumati. Nitrogen use efficiency (NUE) was increased up to N(100) kg N ha(-1) and it was declined with rising nitrogen doses (N(200) kg N ha(-1)). The highest values for NUE was achieved by rice genotype Krishna Hamsa whereas lowest by Vasumati. In addition to this, a significant correlation between nitrogen doses and growth dynamics, biomass partitioning and chaffy grain was observed. These findings suggest that growth dynamics, biomass partitioning, chaffy grain could be enha...Continue Reading

References

Jun 25, 2005·Science·Motoyuki AshikariMakoto Matsuoka
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Mar 31, 2010·Ecological Applications : a Publication of the Ecological Society of America·T D AhrensP A Matson
Oct 12, 2010·Journal of Experimental Botany·Surya KantSteven J Rothstein

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Citations

Jun 15, 2018·International Journal of Molecular Sciences·Jauhar AliZhikang Li
Nov 6, 2015·Frontiers in Plant Science·Mettu M Reddy, Kandasamy Ulaganathan
Apr 10, 2021·Frontiers in Plant Science·Umme Aminun NaherMd Shahjahan Kabir

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