EVALUATION OF YIELD AND YIELD PARAMETERS IN DIFFERENT RICE FARMING SYSTEMS AND WEED MANAGEMENT PRACTICES

Abstract

An experiment was undertaken in a farmer's field in Chidambaram Sathamangalam, Cuddalore district of Tamil Nadu, during Navarai 2021 to the evaluation of yield and yield parameters in different rice farming systems and weed management practices. The experiment was conducted in split plot design with four replications, two main treatments with different rice farming systems viz, M₁-Monocropping and M₂-Annamalai rice + fish + poultry farming system and three sub treatments with weed management practices viz., S₁ – unweeded control, S₂ – twice hand weeding on 20 and 40 DAT, S₃ – pre emergence (PE) application through tank mix of butachlor (50 % EC) @ 1.25   kg a.i. ha^-1+ 2,4-DEE (38 % EC) @ 0.6 kg a.i. ha^-1. The results indicated that, in farming systems the Annamalai rice + fish + poultry farming system (M₂) show significant performance on the various yield parameters than rice monocropping (M₁). In weed management practices, twice hand weeding in on 20 and 40 DAT (S₂) recorded the highest yield parameters. It was followed by PE application through tank mix of butachlor (50 % EC) @ 1.25 kg a.i. ha^-1 + 2,4-DEE (38 % EC) @ 0.6 kg a.i. ha^-1 (S₃). The lowest yield parameters were registered in unweeded control (S₁).

Among interactions, Annamalai rice + fish + poultry farming system along with two hand weedings on 20 and 40 DAT (M₂S₂) recorded significantly the highest yield parameters during Samba 2020. This was followed by Annamalai rice + fish + poultry farming system along with PE application through tank mix of butachlor (50 % EC) @ 1.25 kg a.i. ha^-1 + 2,4-DEE (38 % EC) @ 0.6 kg a.i. ha^-1 (M₂S₃) in Navarai 2021 cropping season. The season's lowest yield characteristics were observed in monocultures of rice grown without weed management (M₁S₁). By recording the maximum yield parameters during Navarai 2021, the Annamalai rice + fish + poultry farming system performs much better than rice monocropping.