왕우렁이를 이용한 벼 친환경재배포장에서 벼와 왕우렁이 생장에 대한 중간낙수 효과
Midsummer Drainage Effects on Rice Growth and Golden Apple Snails in Environment-friendly Rice Cultivation
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Abstract
This study was performed to examine whether it is possible to promote rice growth by midsummer drainage without damage of golden apple snails in environment- friendly rice farming. The effect of drainage on the life of snails was examined in a greenhouse before the filed experiment. Spats (young shells) of snails survived 100% at 12 days after drainage, and 93.3% at 15 days after drainage. The mid- sized shells survived 100% at 9 days, 93.3% at 12 days, and 86.6% at 15 days after drainage. In the field experiment, 10-days drainage did not affect the snail population and there was no significant difference of weeding activity of snails between the midsummer drainage treatment and the continuous submerged treatment. The plant height and the effective tiller number in the midsummer drainage treatment were higher than those of the continuous submerged treatment. The rice yield of midsummer drainage plot was 511kg/10a, which was 66kg/10a higher than 445kg/10a of continuous submerged plot. In conclusion, midsummer drainage could increase rice growth and yield without damage of golden apple snails in the environment-friendly rice farming.
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