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2007•ORYZA- An International Journal on RiceRequires access

Effect of nitrogen levels and weed management in hybrid rice

E.K. Srinivasan, S. K. Natarajan, M.M. Ganapathy, K. Arivazhagan

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Abstract

The effect of different levels of nitrogen (0, 100, 150 and 200 kg ha-1) and certain weeding practices on hybrid rice (ADTRH-1) were studied during both dry and wet season of 2003. Response of nitrogen was noticed up to 150 kg ha-1 with the maximum grain yield of 5.80 t ha-1. In respect of weed management practices, highest rice grain yield was obtained with weed free (6.24 t ha-1) followed by butachlor 1.5 kg a.i. ha-1 at 3 days after transplanting (DAT) + hand weeding at 40 DAT (5.78 t ha-1)and the effect was comparable with that of hand weeding at 20 and 40 DAT.

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What this paper is about

The effect of different levels of nitrogen (0, 100, 150 and 200 kg ha-1) and certain weeding practices on hybrid rice (ADTRH-1) were studied during both dry and wet season of 2003. Response of nitrogen was noticed up to 150 kg ha-1 with the maximum grain yield of 5.80 t ha-1. In respect of weed management practices, highest rice grain yield was obtained with weed free (6.24 t ha-1) followed by butachlor 1.5 kg a.i. ha-1 at 3 days after transplanting (DAT) + hand weeding at 40 DAT (5.78 t ha-1)and the effect was comparable with that of hand weeding at 20 and 40 DAT.

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Available abstract

The effect of different levels of nitrogen (0, 100, 150 and 200 kg ha-1) and certain weeding practices on hybrid rice (ADTRH-1) were studied during both dry and wet season of 2003. Response of nitrogen was noticed up to 150 kg ha-1 with the maximum grain yield of 5.80 t ha-1. In respect of weed management practices, highest rice grain yield was obtained with weed free (6.24 t ha-1) followed by butachlor 1.5 kg a.i. ha-1 at 3 days after transplanting (DAT) + hand weeding at 40 DAT (5.78 t ha-1)and the effect was comparable with that of hand weeding at 20 and 40 DAT.

Key concepts: Butachlor, Transplanting, Weed control, Agronomy, Nitrogen, Grain yield, Weed, Yield (engineering)

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