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中国油料作物学报 ›› 2019, Vol. 41 ›› Issue (4): 588-.doi: 10.7505/j.issn.1007-9084.2019.04.013

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Analysis of key climate impact factors and model on oil content of Camellia

  

  1. 1. Hunan Climate Center, Changsha 410118, China;
    2. Hunan Institute of Meteorological Sciences, Changsha 410118, China
  • Online:2019-08-28 Published:2019-10-18

Abstract:

To better understand the climate impact on camellia (Camellia oleifera L., oil-tea camellia) seed oil, data of 120 items on fresh fruit oil content of camellia and the adjacent meteorological observation data were collect? ed and analyzed from 2009 to 2017 in Hunan Province. Correlation between climatic factors and fresh fruit oil con? tent in each stage of camellia were obtained by correlation analysis and stepwise regression method. Results showed that the highest correlation coefficient between climatic factors with the oil-content rate at each stage included an? nual extreme maximum temperature, daily maximum temperature above 37°C in the peak period of fruit enlarge? ment, days of daily precipitation above 1 mm in the post-harvest treatment period, the longest continuous no rain
days at fruit ripening period, the extreme maximum temperature during the peak period of fat conversion and accu? mulation stage, and the average minimum relative humidity of the first expansion period of the fruit respectively. Based on 420 climatic factors, the model of camellia fruit oil content had high precision. According to comprehen? sive analysis, the most important phenological period affecting the fruit oil was the peak of oil conversion and accu? mulation. And the key climatic factors were extreme maximum temperature, accumulated temperature of daily aver? age temperature ≥20℃, the longest continuous day without sunshine, and the longest continuous number of days without rain.

Key words: oil content of camellia (Camellia oleifera L.), oil content rate, correlation analysis, stepwise re? gression, phenological period, climatic factors