• Title/Summary/Keyword: 담수직파

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Morphological Characteristics of Growth of Rice and Barnyardgrass under Various Cropping Patterns - IV. Difference in Morphological and Anatomical Response to Butachlor (재배양식(栽培樣式)에 따른 벼와 피의 생장(生長) 및 해부형태학적(解剖形態學的) 차이(差異) - IV. 재배양식(栽培樣式)에 따른 제초제(除草劑) Butachlor에 대(對)한 벼와 피간(間)의 해부형태학적(解剖形態學的) 반응(反應) 차이(差異))

  • Chon, S.U.;Guh, J.O.;Kim, Y.J.
    • Korean Journal of Weed Science
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    • v.14 no.3
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    • pp.199-211
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    • 1994

  • Butachlor applied pre-emergence at 3.6kg ai/ha inhibited the growth and developments of shoot of barnyardgrass under dry condition, whereas rice was unaffected. Growth of rice and barnyardgrass under water condition was severely inhibited by treatment of butachlor but that of transplanted rice was not affected. The inhibition rate was higher under water condition, in broadcast rice and direct seeded rice than under dry condition, drilled rice and transplanted rice, respectively. The major anatomical response of stem of barnyardgrass seedling to butachlor under dry condition were partial reduction in thickness and collapse of leaf sheath, while not in rice. Broadcast rice on soil under water condition appeared reduction and constriction of leaf primordia thickness, and barnyardgrass formed tubular-like leaves and showed inhibited elongation of apical meristem. On the other hand, transplanted rice did not show these responses.

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Seedling Emergence of Direct Seeded Paddy Rice at Different Soil Moisture Regimes (벼 건답직파재배에서 토양수분이 출아에 미치는 영향)

  • 이석순;백준호;김태주;홍승범
    • KOREAN JOURNAL OF CROP SCIENCE
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    • v.38 no.3
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    • pp.228-234
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    • 1993

  • Seedling emergence of 15 rice varieties (Gayabyeo, Chilseongbyeo, Samgangbyeo, Yeongsanbyeo, Yeongdeugbyeo, Hwajinbyeo, Palgongbyeo, Seomjinbyeo, Tamjinbyeo, Milyang 95, M 101, M 202, Newbonnet, Tebonnet, and Lemont) were tested at different soil moisture regimes and seeding depths. Submergence for four days immediately after seeding did not reduce emergence rate in all varieties. Under the flooded condition, the percentage of emergence of all varieties at 1.5cm seeding depth ranged 0～40%, it is much lower compared to uncovered control, and percentage of seedling survival ranged 0～24% due to death of some emerged seedlings. Under the field condition, one time flooding up to 10cm above the soil surface after seeding did not reduce the percent emergence of seedlings. The pF value of soil was 0 for few days after flooding or raining and Eh of soil ranged 443-453m V.

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