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A field trial comprising 3 rice varieties NDR-359, Sarju 52, HUBR 2-1 and 4 LCC scores ≤ 2, ≤ 3, ≤ 4, ≤ 5 along with the recommended dose of N was conducted in a split plot design to calibrate the LCC for nitrogen requirement of rice. Maximum grain yields of NDR-359, Sarju 52 at LCC ≤ 5 and HUBR 2-1 at LCC ≤ 4 were found to be 47.10, 40.66 and 36.04 q-ha respectively. The critical LCC score for real time nitrogen requirement for NDR 359 and Sarju 52 was found to be ≤ 5, while for HUBR 2-1 it was ≤ 4. Agronomic and recovery efficiency of nitrogen also followed the same trend. In the functional relationship between SPAD value and LCC score, while it was linear in NDR-359 and Sarju 52, for HUBR 2-1 it was quadratic. Further a positive correlation between SPAD values and LCC score was observed in all the 3 varieties.

KEYWORDS

Leaf Colour Chart LCC, Nitrogen, Rice

Cite this paper

A. Sen, V. Srivastava, M. Singh, R. Singh and S. Kumar -Leaf Colour Chart vis-a-vis Nitrogen Management in Different Rice Genotypes,- American Journal of Plant Sciences, Vol. 2 No. 2, 2011, pp. 223-236. doi: 10.4236-ajps.2011.22024.





Autor: Avijit Sen, Vinod Kumar Srivastava, Manoj Kumar Singh, Ram Kumar Singh, Suneel Kumar

Fuente: http://www.scirp.org/



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