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Effect of seed rate and application of N fertilizer on grain yield and N uptake of rice under intermediate deepwater conditions (15–50 cm)

Published online by Cambridge University Press:  27 March 2009

M. D. Reddy ,
B. C. Ghosh  and
M. M. Panda
M. D. Reddy
Affiliation:
Laboratory of Deepwater Rice, Agronomy Division, Central Rice Research Institute, Cuttack, India
B. C. Ghosh
Affiliation:
Laboratory of Deepwater Rice, Agronomy Division, Central Rice Research Institute, Cuttack, India
M. M. Panda
Affiliation:
Laboratory of Deepwater Rice, Agronomy Division, Central Rice Research Institute, Cuttack, India
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Summary

In an intermediate deepwater (15–50 cm) situation, the number of tillers increased with increase of nitrogen fertilizer from 0 to 40 and 80 kg/ha and of seed rate from 100 to 200, 300 and 400 seeds/m2. The tiller mortality due to higher water depth was higher under no-N treatment and under higher seed rates. The number of panicles and grain yield increased significantly with increase in N. Similarly, an increase in the seed rate increased the number of panicles and decreased the number of grains per panicle and panicle weight. The grain yields of the different seed rates were similar. The interaction between N levels and seed rates was not significant.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 107 , Issue 1 , August 1986 , pp. 61 - 66
Copyright
Copyright © Cambridge University Press 1986

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