Effects of Aigamo Ducks(Crossbred of Wild and Domestic Ducks) Herding on Growth and Production of Rice Plant in Paddy Fields.

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This study was conducted to elucidate the effects of Aigamo ducks on growth and production of rice plant in paddy rice farming. Three paddy fields were used: (1) control plot, no ducks and no agrochemicals; (2) agrochemicals plot, agrochemicals were used according to the standard established by Kagoshima prefecture and (3) Aigamo plot, no agrochemicals but keeping ducks. Thirty five Aigamo ducks in four weeks of age were introduced to the plot (10a) initially and the number was adjusted to seventeen later. Aigamo ducks were kept in the plot for two months, at which the head of rice plants have formed.The following result was obtained.1. The height of rice plant in the agrochemicals plot was significantly (P<0.01) higher than those of other two plots during the first half period, but their differences in height disappeared during the latter half period.2. The number of culms of rice plant increased in the order of Aigamo, control and agrochemicals plots.3. Total leaf area of rice plant in the agrochemicals plot was significantly (P<0.01) higher than those of other two plots. Where the height of rice plant was 60-70cm, the relative illuminance did not differ among three plots, but where the height of rice plant was 50cm or below, agrochemicals plot tended to have lower relative illuminance than those of other two plots.4. The number of rice plants badly damaged by Aigamo ducks was 446, which is equivalent to 4.5%.5. The number of heads, ripening grains and yield crops per stump of rice plant increased in the order of Aigamo, control and agrochemicals plot. But the yield crops of rice plant per 10a did not differ between Aigamo and agrochemicals plots.
日本家禽学会の論文

Effects of Aigamo Ducks(Crossbred of Wild and Domestic Ducks) Herding on Growth and Production of Rice Plant in Paddy Fields.

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日本家禽学会 | 論文

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