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2014 Vol.23, Issue 1 Preview Page
Comparison of Cardinal Temperatures of Lettuce Using Bilinear, Parabolic, and Beta Distribution Functions

선형, 쌍곡선과 Beta 함수를 이용한 상추의 주요 온도 비교

Mi-Kyung Cha1
,
Chun-Sik Kim2
,
Jirapa Austin2
,
Young-Yeol Cho23*
차 미경1
,
김 춘식2
,
Jirapa Austin2
,
조 영열23*
1Major in Plant Resources and Environment, Jeju National University, Jeju 690-756, Korea
2Major in Horticultural Science, Jeju National University, Jeju 696-756, Korea
3Research Institute for Subtropical Agriculture and Animal Biotechnology, Jeju National University, Jeju 696-756, Korea
1제주대학교 식물자원환경전공
2제주대학교 원예환경전공
3제주대학교 아열대농업생명과학연구소
*Corresponding Author : yycho@jejunu.ac.kr
31 January 2014. pp. 39-42
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Abstract

The objective of this study was to estimate cardinal temperatures for germination of lettuce (Lactuca sativar L.) using bilinear, parabolic, and beta distribution functions. Seeds of lettuce were germinated in a growth chamber at 7 constant temperatures: 10, 14, 16, 20, 24, 28, and 32°C. Four replicates of 100 seeds were placed on two layers of filter paper in a 9 cm petri-dish. Radicle emergence of 1 mm was scored as germination. The time course of germination was modeled using a logistic function. These minimum, optimum, and maximum temperatures were estimated by regression of the inverse of time to 50% germination rate against the temperature gradient. In bili near function, minimum, optimum, and maximum temperatures were 7.9°C, 23.3°C, and 28.0°C, respectively. In parabolic function, minimum, optimum, and maximum temperatures were 9.7°C, 19.5°C, and 29.4°C, respectively. In beta distribution function, minimum, optimum, and maximum temperatures were 3.7°C, 20.7°C and 32.0°C, respectively. Minimum, optimum, and maximum ranges of temperatures were 3.7~9.7°C, 19.5~23.3°C, and 28.0~32.0°C, respectively.

Keywords
germination
germination rate
growing degree-days
maximum temperature
minimum temperature
optimum temperature

본 연구의 목적은 선형, 쌍곡선, 베타 함수를 이용하여 상추의 주요 온도를 예측하기 위함이다. 상추 종자를 항 온 생육상에서 발아시켰다. 온도처리는 10°C, 14°C, 16°C, 20°C, 24°C, 28°C와 32°C였다. 100개의 종자를 9cm 페 트리디쉬에 필터페이퍼 2장을 깔고 4반복 실시하였다. 유근이 1mm 나왔을 때를 발아로 하였다. 시간에 따른 발아율은 로지스틱 함수로 계산하였다. 최저, 최적, 최고 온도는 50% 발아한 시점의 역수를 온도에 따른 함수로 표기하여 나타내었다. 선형 함수의 경우, 최저, 최적, 최 고 온도는 각각 7.9°C, 23.3°C, 28.0°C였으며, 쌍곡선 함 수의 경우, 최저, 최적, 최고 온도는 각각 9.7°C, 19.5°C, 29.4°C였으며, 베타 함수인 경우, 최저, 최적, 최고 온도 는 각각 3.7°C, 20.7°C, 32.0°C였다. 최저, 최적, 최고 온 도 범위는 각각 3.7~7.9°C, 19.5~23.3°C, 28.0~32.0°C이 었다.

키워드
발아
발아율
유효적산온도
최고 온도
최저 온도
최적 온도
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Information
  • Publisher :The Korean Society for Bio-Environment Control
  • Publisher(Ko) :(사)한국생물환경조절학회
  • Journal Title :Protected Horticulture and Plant Factory
  • Journal Title(Ko) :시설원예ㆍ식물공장
  • Volume : 23
  • No :1
  • Pages :39-42
  • Received Date : 2014-02-14
  • Revised Date : 2014-03-07
  • Accepted Date : 2014-03-10
  • DOI :https://doi.org/10.12791/KSBEC.2014.23.1.039
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