Estimate of Critical Period of Weed Competition for Eleocharis Kuroguwai Ohwi in Machine Transplanting Rice Field

This experiment was conducted to find out the effedt of competitve duration and denisity of Eleocharis Kuroguwai Ohwi in machine transplanting rice field. E. Kuroguwai was sprouting until 75 days after transplanting it was about 65.8% sprouting at 45 days after transplanting. Yield reduction of rice...

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Bibliographic Details
Published inKorea Journal of Weed Science Vol. 23; no. 3
Main Authors Ku, Y.C. (National Crop Experiment Station, Suwon, Republic of Korea), Roh, S.W, Seong, K.Y, Park, J.H, Song, D.Y
Format Journal Article
LanguageKorean
Published 01.09.2003
Subjects
MALEZAS
MAUVAISE HERBE
WEEDS
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Summary:This experiment was conducted to find out the effedt of competitve duration and denisity of Eleocharis Kuroguwai Ohwi in machine transplanting rice field. E. Kuroguwai was sprouting until 75 days after transplanting it was about 65.8% sprouting at 45 days after transplanting. Yield reduction of rice due to weed density was increased in higher density and 40 plant per £í2 was decreased about 20~24 percent. When E. Kuroguwai was not controlled during the 20,40,60,80 and 100 days after transplanting rice, yield was reducted by 1, 6, 25, 49 and 59% respectively.
Bibliography:2004006887
N20
ISSN:0253-7468