• Title/Summary/Keyword: direct seeding

Search Result 420, Processing Time 0.029 seconds

Rice Plant Growth Characteristics According to Different Seed Germination Length and Damage (볍씨 최아 및 최아 손상정도에 따른 초기생육변화 분석)

  • Choi, Myoung-Goo;Jeong, Jae-Hyeok;Lee, Hyen-Seok;Yang, Seo-Yeong;Lee, Chung-gun;Hwang, Woon-Ha
    • KOREAN JOURNAL OF CROP SCIENCE
    • /
    • v.66 no.3
    • /
    • pp.183-189
    • /
    • 2021

  • We checked the emergence rate and early growth characteristics of young rice plants according to the germination length and seed damage ratio in direct seeding. The emergence rate was reduced according to the longer germination length and higher seed damage ratio. The emergence rate was further reduced under high-temperature conditions. The leaf number did not show a significant difference according to germination length and seed damage ratio. However, shoot and root dry weights were reduced according to the germination length and seed damage ratio. The root dry weight was highly correlated with the shoot dry weight. Based on these results, we concluded that a longer germination length and seed damage could induce the loss of nutrients and affect poor root growth, consequently inducing poor emergence and growth in the early growth stage of rice seeds. Therefore, in rice direct seeding, seed conditions of less than 1 mm of germination length should be checked for a sufficiently high standing rate and adequate growth characteristics after seeding.

  • https://doi.org/10.7740/kjcs.2021.66.3.183 인용 PDF KSCI

Effect of Nitrogen Split Application Methods under Different Soil Textures on Growth and Yield of Rice in Direct Seeding on Dry Paddy (벼 건답직파재배에서 토성별 질소분시방법이 생육에 수량에 미치는 영향)

  • Kim, Chung-Kon;Yun, Yong-Dae;Yang, Won-Ha;Oh, Yun-Jin
    • KOREAN JOURNAL OF CROP SCIENCE
    • /
    • v.40 no.6
    • /
    • pp.731-737
    • /
    • 1995

  • This experiment was carried out at National Crop Experiment Station in 1994 to obtain basic information of growth characters and yield of rice under various nitrogen split application methods on different soil textures in direct seeding on dry paddy. Hwaseongbyeo sown on April 27 by flat drill seeding, and irrigation was done at 3 leaf stage after seedling establishment. Number of seedling stand was 159~177 seedlings per $m^2$ regardless of soil texture and nitrogen application method. Number of panicle per unit area in loam was higher than in sandy loam, and it also was higher in top dressing plots, which were 3 times application at rate of 40-30-30% (3rd leaf stage -7th leaf stage -panicle initiation stage) and 4 times application 10-30-30-30%(basal-3rd leaf stage -7th leaf stage -panicle initiation stage), than in conventional method. Leaf colour, leaf area index and dry matter production at heading stage were highest at top dressing plots among the nitrogen application methods in both sandy loam and loam. Lodging index in top dressing plots increased by low breaking weight with long culm. There were field lodging of degree 3 in top dressing plots. Rice yield in sandy loam, loam increased by 7~9%, 6~9% in top dressing of nitrogen, respectively.

  • PDF