Leaf Colour Chart vis-a-vis Nitrogen Management in Different Rice Genotypes


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.

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Sen, A. , Srivastava, V. , Singh, M. , Singh, R. and Kumar, S. (2011) Leaf Colour Chart vis-a-vis Nitrogen Management in Different Rice Genotypes. American Journal of Plant Sciences, 2, 223-236. doi: 10.4236/ajps.2011.22024.

Conflicts of Interest

The authors declare no conflicts of interest.


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