• Title, Summary, Keyword: Infant Rice Seedling

Search Result 27, Processing Time 0.052 seconds

Effects of Plant Growth Regulators on Growth of Rice Seedling for Machine Transplanting (식물생장조절제 처리가 벼기계이앙 어린모 생육에 미치는 영향)

  • 이주열
    • KOREAN JOURNAL OF CROP SCIENCE
    • /
    • v.38 no.4
    • /
    • pp.360-365
    • /
    • 1993
  • The infant seedling of rice(8-to 10-day-old) has often suffered from submergence just after transplanting due to the too short seedling height, 5 to 8cm, This experiment was conducted to elucidate the effect of gibberellic acid($GA_3 : 25% soluble liquid) with the application methods of foliar spray and seed-soaking on the elongation of seedling height of infant rice seedling in machine transplanting, We used a japonica rice variety, Hwaseongbyeo, and the seeding rate was 200g per seed tray(30$\times60$\times3cm). Generally,$GA_3 and Metalaxyl increased the elongation of seedling height of infant seedling while Tetracycle decreased the seedling height, To increase the seedling height of infant seedling, the foliar spary application of $GA_3 was better than seed-soaking treatment. The optimum concentration of $GA_3 for the foliar spray was about l0ppm and the optimum application time of $GA_3 was 3 to 4 days after sowing.

  • PDF

Effect of Expanded Rice Husk Medium on Rice Seedling for Machine Transplanting

  • Ko Jonghan;Kim Doo Yeol;Sa Jong Gu;Lee Byun Woo;Lee Youn Su
    • KOREAN JOURNAL OF CROP SCIENCE
    • /
    • v.50 no.1
    • /
    • pp.55-59
    • /
    • 2005
  • Rice farmers can save labor and expenses by using expanded rice husk (ERH) as a seedling medium since ERH is lighter and cheaper than other commercial seedling media (CSM). This study was carried out to develop a method for rice seedling cultivation using ERH as a seedling medium. It is suggested that a mixture of $60\%$ of ERH and $40\%$ of a CSM could be used as a seedling medium; the planting densities would be 240g per tray for infant seedlings and 200 g for young seedlings; and nitrogen (N) would be applied at a rate of 1g per tray for infant seedlings prior to planting and 2g per tray for young seedlings with division. Great care should be taken to use $CO(NH_2)_2$ as an N-source fertilizer. These results would lay a foundation for the rice seedling cultivation with ERH as a medium.

Raising of Rice Infant Seedling Using of Shelve (다단식 시렁을 이용한 벼 어린모 육묘 기술)

  • 김상수;전병태;박석홍
    • KOREAN JOURNAL OF CROP SCIENCE
    • /
    • v.35 no.6
    • /
    • pp.492-496
    • /
    • 1990
  • To utilize narrow space of vinyl house for rice seedling raising in three dimensions and raise infant seedling in large quantilies at once, shelves were constructed with few stories in inside of vinyl house and seedlings were raised by use of the shelve. Seedling characters, rice growth status on paddy field and rice grain yield were tested and the following results were obtained. Rice seedling raising was practicable to 10 days after sowing in the interval of 20cm height and 12 days, 30cm height on the shelve for seedling raising. Seedling characters, rice growth status on paddy field and rice grain yield were not varied according to the seedling raising height of the shelve. Seedling characters were not different according to irrigation intervals in raising box of rice seedling.

  • PDF

Nitrogen Management for Infant Rice Seedlings with Extended Nursery Duration by Delayed Transplanting (벼 육묘일수가 지연된 어린모 이앙재배시 질소분시 방법이 생육 및 수량에 미치는 영향)

  • Han, Hee-Suk;Yang, Woon-Ho;Park, Jeong-Hwa;Yoon, Young-Hwan;Kim, Je-Kyu;Yang, Won-Ha;Park, Jong-Wook
    • KOREAN JOURNAL OF CROP SCIENCE
    • /
    • v.53 no.3
    • /
    • pp.239-243
    • /
    • 2008
  • This experiment was carried out to elucidate the appropriate split application method of nitrogen fertilizer in infant rice seedlings which show poor seedling growth resulted from extended seedling nursery duration more than 12 days. The 16 day-old infant rice seedling (DOIRS) showed poor seedling growth than 8 day-old seedling. Early growth of transplanted 16 DOIRS was poor, compared with that of transplanted 8 DOIRS. However, the poor plant growth estimated by plant height, tiller number, and the number of newly developed roots was compensated by 70-0-30% (basaltillering-panicle initiation) of nitrogen split application. In 70-0-30% plots among split nitrogen application methods, tiller number, biomass, and leaf area at heading stage of rice showed the highest values. Sixteen DOIRS plots showed lower grain filling and 1000-grain weight, resulted in lower yield of rice than 8 DOIRS plots in the same nitrogen split application. However the lower yield in 16 DOIRS plots was recovered by 70-0-30% of nitrogen split application method to a similar level in 8 DOIRS plots in which nitrogen was split applied by 40-30-30%.

Effect of Nursery Period on Seedling Growth and Yield in Transplant Rice with Infant Seedling (벼 어린모 육묘일수 연장에 따른 모소질, 본답 생육 및 수량성)

  • 김덕수;김정곤;김제규;한희석;강양순
    • KOREAN JOURNAL OF CROP SCIENCE
    • /
    • v.46 no.3
    • /
    • pp.184-188
    • /
    • 2001
  • This study was conducted to find out the basic informations related to the rice cultivation using the infant seedlings. Infant seedlings with different nursery Periods were compared for the growth and grain yield of rice at the National Crop Experiment Station in 1997. The highest sound seedling ratio of 93.9% was observed in 8-day old seedling, followed by 88.9% of 12-day, 82.0% of 16-day, and 80.8% of 20-day, The endosperm remained 52.5% in the 8-day old seedling at transplanting and decreasingly with increasing nursery period. Missing hills at transplanting were more in 16-day and 20-day old seedling than in 8-day and 12-day old seedlings, 5.1-5.2% in 8-day and 12-day growing seedling, 6.7% in 16-day and 7.8% in 20-day old seedling. Rooting ability was observed highest in 8-day, followed by 12-day, 16-day and 20-day old seedling. The milled rice was lower by 5-16% in 12-day, 16-day and 20-day old seedling than in 8-day old seedling of 6.18 t/ha. It was found that the 8-day and 12-day old seedling provided more advantage for sound seedling ratio, endosperm remaining, missing hill during transplanting, rooting ability and grain yields than 16-day and 20-day old seedlings.

  • PDF

Effect of Organic Matter Application on Heavy Metal Uptake of Infant Rice Seedling (어린모의 중금속(重金屬) 흡수(吸收)에 미치는 유기물(有機物) 시용(施用) 효과(效果))

  • Kim, Jeong-Gyu;Lee, Chang-Ho;Lee, Won-Seok;Lim, Soo-Kil
    • Korean Journal of Environmental Agriculture
    • /
    • v.17 no.2
    • /
    • pp.150-155
    • /
    • 1998
  • To investigate effects of organic matter application on heavy metal uptake of infant rice seeding, the various amount of organic matter(peat and $Bio-com^{(R)}$)was applied on Cd or Cu treated nursery bed soil. No growth difference was observed up to 20mg/kg of Cu treatment. Above 20mg/kg of Cu treatment, the seeding height and top dry weight were decreased but the Cu uptake by seeding was increased with increasing Cu treatment level. The mat formation was poor above 20mg/kg of Cu treatment, however, the seeding peat application level. All peat treatment resulted better mat formation than control. The seeding height and top dry increasing Cd treatment level. The mat formation was not effected by either Cd treatment level or organic matter sources. The effect of peat and $Bio-com{(R)}$ application on Cd uptake by infant rice seeding was not observed at all Cd treatments level.

  • PDF