Energy-Saving Night Temperature Regime for Satsuma Mandarins (Citrus unshiu Marc.) Grown in a Plastic House with Heating. I. Effect of Temperature and Water Condition on Fruit Growth and Quality

Taku YANO; Kimiaki MATSUBARA; Moe SHIMOOKA; Akira TAMANOI; Minoru NARAHARA; Masatoshi KAWANO; Shunichiro ITO; Shuji SETOYAMA; Eriko YASUNAGA; Takuya ARAKI; Masaharu KITANO

doi:10.2525/ecb.52.161

Original Paper

Energy-Saving Night Temperature Regime for Satsuma Mandarins (Citrus unshiu Marc.) Grown in a Plastic House with Heating. I. Effect of Temperature and Water Condition on Fruit Growth and Quality

Taku YANO, Kimiaki MATSUBARA, Moe SHIMOOKA, Akira TAMANOI, Minoru NARAHARA, Masatoshi KAWANO, Shunichiro ITO, Shuji SETOYAMA, Eriko YASUNAGA, Takuya ARAKI, Masaharu KITANO

Author information

Taku YANO
Fruit Tree Group, Oita Prefectural Agriculture, Forestry, and Fisheries Research Center
Faculty of Agriculture, Kyushu University
Kimiaki MATSUBARA
Fruit Tree Group, Oita Prefectural Agriculture, Forestry, and Fisheries Research Center
Moe SHIMOOKA
Fruit Tree Group, Oita Prefectural Agriculture, Forestry, and Fisheries Research Center
Akira TAMANOI
Fruit Tree Group, Oita Prefectural Agriculture, Forestry, and Fisheries Research Center
Minoru NARAHARA
Fruit Tree Group, Oita Prefectural Agriculture, Forestry, and Fisheries Research Center
Masatoshi KAWANO
Fruit Tree Group, Oita Prefectural Agriculture, Forestry, and Fisheries Research Center
Shunichiro ITO
Fruit Tree Group, Oita Prefectural Agriculture, Forestry, and Fisheries Research Center
Shuji SETOYAMA
Faculty of Agriculture, Kyushu University
Eriko YASUNAGA
Institute for Sustainable Agro-ecosystem Services, the University of Tokyo
Takuya ARAKI
Faculty of Agriculture, Ehime University
Masaharu KITANO
Faculty of Agriculture, Kyushu University

Keywords: fruit stage, light condition, xylem water potential

JOURNAL FREE ACCESS

2014 Volume 52 Issue 3 Pages 161-166

DOI https://doi.org/10.2525/ecb.52.161

Details

Abstract

In this study, we discussed how temperature and other environmental factors affect the fruit growth and quality of Satsuma mandarin grown in a plastic house with heating. At 14–23°C, the average nighttime air temperature was positively correlated with the standardized fruit growth rate (GRF_St) in the young stage. In contrast, GRF_St was clearly depressed with a daytime air temperature at around 30°C, and the optimum air temperature for active fruit growth was 25°C. Moreover, in the middle and mature stages, the air temperature did not correlate with the GRF_St. These results indicate that, in the young stage, the air temperature should be controlled at around 25°C during the daytime and 20–23°C during the nighttime for active fruit growth. In the middle and mature stages, fruit growth might not require nighttime air temperatures that are as high as 20–23°C. The air temperatures did not correlate with the fruit soluble sugar content (SSC); in contrast, a close relationship was found between the predawn xylem water potential (Ψ_Xy) and SSC. The day temperature, radiation and Ψ_Xy were linearly correlated with the fruit titratable acidity (TA) in the young stage.

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