Evaluating the Effect of Different Duck Number on Yield of Rice Cultivars (Oryza sativa L.) Based Organic Farming

Document Type : Research Paper

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Abstract

In order to evaluate the effect of duck number on paddy yield and yield components of tree rice cultivars, an experiment was conducted at Sari Agricultural Sciences and Natural Resources University, Sari, Iran, during 2011. Experiment was arranged as split plot based randomized complete block design with four replicates. Main plots were duck number at three levels (control, 400 and 800 pieces ha-1) and sub plot were rice cultivars (Tarom as traditional cultivar and Shirodi and Ghaem as improved cultivars). Results of ANOVA showed that there were significant differences between duck, cultivar and duck × cultivar in terms of tiller number, filled and unfilled grain number, grain number per panicle, biological yield, panicle length, days to 50% flowering and paddy yield. Maximum tiller number, fertile tiller number, filled and total grain number, panicle length, biological yield, days to 50% flowering and maturity and paddy yield were belonged to 800 ducks per hectare. The highest tiller number (23 tiller per hill), days to 50% flowering and maturity (104 and 136 days respectively), biological yield (13.7 ton ha-1) and paddy yield (5.3 ton ha-1) were recorded in Shirodi. By contrast, 800 duck per hectare in Tarom produced the highest panicle length (28 cm), filled grains per panicle (125 number), fertile tiller number (19 number) and total grain number (132 number). In conclusion, organic rice-duck farming using 800 ducks per hectare in Tarom and Shirodi cultivars could be recommended for similar regions.

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