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2017 Vol.62, Issue 3 Preview Page

Original Research Article

Effects of Growing Degree Days on Growth and Yield of Maize Depending on the Sowing Date

파종시기별 유효적산온도(GDD)가 옥수수의 생육 및 수량변화에 미치는 영향

Mi Jung Kim1
,
Gun Ho Jung2†
,
Sung Kook Kim2
,
Jae Eun Lee2
,
Weon Tai Jeon2
,
Kang Bo Shim2
,
Min Tai Kim2
,
Koan Sik Woo2
,
Yong Up Kwon2
,
Sunggi Heu2
김 미정1
,
정 건호2†
,
김 성국2
,
이 재은2
,
전 원태2
,
심 강보2
,
김 민태2
,
우 관식2
,
권 영업2
,
허 성기2
1R&D Coordination Division, Crop Sci., National Institute of Crop Science, 300 Nongsaengmyeong-ro, Wanju-gun, Jeonju-si 54875, Korea
2National Institute of Crop Science, RDA., Department of Central Area, Crop Sci., National Institute of Crop Science, 54 Seoho-ro, Gwonseongu, Suwon, Gyeonggido 16429, Korea
1농촌진흥청
2국립식량과학원 중부작물부
*Corresponding author: Gun Ho Jung; +82-31-695-0642; (ideaway@korea.kr)
30 September 2017. pp. 214-223
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Abstract

A total of 15 different corn hybrids, Kwangpyeongok, Gangdaok, Yanganok, Singwangok, Jangdaok, Cheonganok, Cheongdaok, Andaok, Dapyeongok, Pyeongkangok, Pyeonganok, Daanok, Sunwon 184, Gangilok, and P3394 was used to investigate the growth and yield depending on the sowing date. The sowing dates were April 5, June 25, and July 5 and each experiments was performed in triplicste. The growth of Gangdaok was the highest. However, although the growth of Kwangpyeongok, was lower thanthar of Gangdaok, its stem height to ear height ratio was lower than that of Gangdaok, thus , Kwangpyeongok may be more suitable for stable cultivation. Both growth and yield of Daanok were low, regardless of planting date, but yield and ear shape of Pyeongkangok and Dapyeongok were for fresh corn. Growth and yield of the 15 different corn hybrids varied depending on the planting date, However, the growth degree days (GDD) was the most important factor governing the maturity of corn. More than 1500°C of GDD was sufficient to harvest mature corn hybrids in the central region of Korea. Besides yield and growth, other characteristics, such as sweetness and taste of the hybrids, should be investigated further the selection of the best corn hybrid.

Keywords
growth yield
GDD
maize
planting date
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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 : 62
  • No :3
  • Pages :214-223
  • Received Date : 2017-04-12
  • Revised Date : 2017-07-08
  • Accepted Date : 2017-07-13
  • DOI :https://doi.org/10.7740/kjcs.2017.62.3.214
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