Study on the relationship between the characteristics of stem flow and meteorological factors during oil conversion period of Camellia oleifera

doi:10.14088/j.cnki.issn0439-8114.2022.20.013

Abstract

Abstract: Taking Camellia oleifera Gan 71 clone as an example, in order to master the change law of trunk and stem flow rate of improved Camellia oleifera during the oil and fat conversion period, the correlation between stem flow rate and meteorological factors was analyzed. Needle stem flow meter was used to continuously monitor the stem flow rate of Camellia oleifera and analyze the influence of meteorological factors on the stem flow rate of Camellia oleifera under different weather conditions. Multiple linear regression was used to input regression of stem flow rate and meteorological factors in Camellia oleifera, and the multiple linear regression model of stem flow rate and meteorological factors was established. The results showed that the stem flow rate of Camellia oleifera had an obvious diurnal variation pattern, showing an inverted “U”shape single-peak curve, and the peak value gradually decreased from August to October. The influencing factors of stem flow rate of Camellia oleifera from large to small were in the order of solar radiation, VPD, average temperature, relative humidity, wind speed and precipitation. After regression coefficient and correlation coefficient test, the multiple linear regression equation reached the extremely significant level. During the oil transformation period, the stem flow rate in August was the highest, and the order of stem flow rate in typical weather was sunny day > cloudy day > rainy day > overcast day.

Key words: Camellia oleifera, oil conversion, stem flow rate, meteorological factors, correlation analysis

CLC Number:

S162.5

CAI Zhe, GUO Rui-ge, ZUO Ji-lin, LIU Wen-ying. Study on the relationship between the characteristics of stem flow and meteorological factors during oil conversion period of Camellia oleifera[J]. HUBEI AGRICULTURAL SCIENCES, 2022, 61(20): 69-73.

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