Correlation between Air Temperature Factors and Leafing Date of Mulberry Tree

Ho Cheol Kim; Tae-Choon Kim

doi:10.7235/hort.2015.14173

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2015 Vol.33, Issue 6 Next Page

Correlation between Air Temperature Factors and Leafing Date of Mulberry Tree

31 December 2015. pp. 807-811

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Abstract

This study was conducted to identify the air temperature factors that affect leafing date of mulberry (Morus alba) in Buan, Jeonbuk province. Over the period from 2009 to 2014, the leafing date averaged April 24 (114 Julian days). The earliest leafing date was April 12, in 2014, and the latest leafing date was May 2, in 2011. Yearly variations of daily mean temperature (DMT) and daily maximum temperature (DMxT) were high in the last part of March. There were highly negative correlations between leafing date and degree days of accumulated DMT above 0, 5, and 10°C in the period from March 1 to April 10. Linear regression equations for estimating the leafing date were y = 153.8 - 0.1886 x (r² = 0.965**) and y = 126.2 - 0.2246 x (r² = 0.825*) for the degree days of accumulated DMT above 5°C in the period from March 1 to April 10 and the last part of March, respectively. Therefore, leafing date of mulberry, which is important for popcorn disease control, is 96.5% predicted by degree days of accumulated DMT above 5°C in the periods from March 1 to April 10.

Keywords

accumulated temperature degree day

Julian day

liner regression equation

Morus alba

popcorn disease

본 연구는 전북 부안지역에서 재배되고 있는 ‘참뽕’ 뽕나무(Morus alba)를 대상으로 출엽일에 영향을 주는 기온 요인을 선발하기 위해 수행하였다. 2009년에서 2014년까지 6년간 뽕나무 평균 출엽일은 4월 24일(114 줄리안 일수)이었고, 2014년에 4월 12일로 가장 빨랐고 2011년에 5월 2일로 가장 늦었다. 3월 1일부터 4월 10일까지 일평균기온 및 일최고기온 중에서 3월 하순의 기온이 연차 간 차이가 가장 컸다. 뽕나무 출엽일은 3월 1일부터 4월 10일까지 일평균기온 0, 5, 10°C 이상의 날의 적산온도와 매우 높은 부의 상관을 보였다. 5°C 기준 온도에서 3월 1일부터 4월 10일까지 및 3월 하순의 일평균기온 적산온도와 뽕나무 출엽일과 각각 y = 153.8 - 0.1886 x (r² = 0.965**)와 y = 126.2 - 0.2246 x (r²= 0.825*)로 선형회귀식이 도출되었다. 따라서 오디균핵병 적기 방제를 위한 출엽일은 3월 1일부터 4월 10일까지와 3월 하순의 일평균기온 5°C 이상인 날의 적산온도로 각각 96.5%와 82.5% 예측할 수 있다.

키워드

적산온도

줄리안 일수

선형회귀식

뽕나무

오디균핵병

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Information

Publisher :KOREAN SOCIETY FOR HORTICULTURAL SCIENCE
Publisher(Ko) :한국원예학회
Journal Title :Horticultural Science and Technology
Journal Title(Ko) :원예과학기술지
Volume : 33
No :6
Pages :807-811
Received Date : 2014-10-10
Revised Date : 2015-04-16
Accepted Date : 2015-05-22
DOI :https://doi.org/10.7235/hort.2015.14173

Horticultural Science and Technology 원예과학기술지 ISSN:1226-8763(Print) 2465-8588(Online)

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