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2015 Vol.60, Issue 3

Original Research Article

호남평야지 밀-벼 이모작에서 중만생종 벼 품종의 폿트묘 적정 재식밀도 구명

Study on the Optimum Planting Density of Pot Seedling for Mid-Late Maturing Rice Variety in Wheat-Rice Double Cropping System in Honam Plain Area

Shin-Gu Kang
,
Young-Doo Kim1*
,
Bon-Il Ku1
,
Wan-Gyu Sang1
,
Min-Hee Lee1
,
Hong-Kyu Park1
,
Ji-Young Shon1
,
Woon-Ho Yang1
,
Jeom-Ho Lee1
강 신구
,
김 영두1*
,
구 본일1
,
상 완규1
,
이 민희1
,
박 홍규1
,
손 지영1
,
양 운호1
,
이 점호1
1National Institute of Crop Science, RDA, Suwon 16429, Republic of Korea
1농촌진흥청 국립식량과학원
*Corresponding Author
30 September 2015. pp. 257-265
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Abstract

This experiment was carried out to determine the optimum planting density for rice pot seedling cultivation in wheat-rice double cropping system in Honam plain area. A mid-late maturing rice variety ‘Chinnong’ was raised in pot seedling tray and conventional tray for 30 days, and then transplanted on June 25 in 2012 and 2013. Four different planting densities (15.2, 18.9, 21.6, and 25.3 hills per m2 ) in pot seedlings were applied as treatment. Conventional tray seedling was implicated as control at a single planting density of 27.8 hills per m2 . In this experiment, the number of effective tillers was increased as planting density increasing, but stem diameter was decreased. Pot seedling showed higher stem diameter and effective tillers than the control. Heading dates of pot seedling plots were not significantly different between the planting densities but 2 days faster than the control. Culm length, number of panicles, panicle length, and ripening grain ratio were higher in pot seedling compared to the control, but 1000-grain weight showed no significant difference. Milled rice yields in pot seedlings ranged from 5.19 to 5.43 t ha-1 , and the highest yield was observed in 21.6 hills per m2 . Head rice ratios in pot seedlings and the controls were not significantly different. Above results on planting density of rice pot seedling cultivation would be applicable to wheat-rice double cropping and also to late transplanting cultivation of rice single cropping

Keywords
rice
pot seedling
double cropping
planting density
References

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Information
  • Publisher :The Korean Society of Crop Science
  • Publisher(Ko) :한국작물학회
  • Journal Title :The Korean Journal of Crop Science
  • Journal Title(Ko) :한국작물학회지
  • Volume : 60
  • No :3
  • Pages :257-265
  • Received Date : 2015-02-16
  • Revised Date : 2015-08-06
  • Accepted Date : 2015-08-17
  • DOI :https://doi.org/10.7740/kjcs.2015.60.3.257
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