Evapotranspiration and water balance in a hot pepper (Capsicum frutescens L.) field during a dry season in the tropics

1st International Conference on Food Security and Sustainable Agriculture in The Tropics

农业科学;经济学

Laban, S.^1 ; Oue, H.^2 ; Rampisela, D.A.^1

Departement of Soil Science, Faculty of Agriculture, Hasanuddin University, Jl. Perintis Kemerdekaan KM 10, Makassar

90245, Indonesia^1

Graduate School of Agriculture Sciences, Ehime University, 3-5-7 Tarumi, Ehime, Matsuyama

790-8566, Japan^2

关键词: Actual evapotranspiration;    Irrigation waters;    Leaf Area Index;    Logarithmic functions;    Potential evaporation;    Soil water content;    T-test analysis;    Water shortages;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/157/1/012010/pdf
DOI  :  10.1088/1755-1315/157/1/012010

学科分类：农业科学（综合）

来源: IOP

【 摘 要 】

Evapotranspiration and water balance in a hot pepper (Capsicum frutescens L.) field during the 2nddry season were analyzed in this study. Actual evapotranspiration (ET) was estimated by Bowen Ratio Energy Budget (BREB) method, potential evaporation (EP) was calculated by Penman method, and irrigation volume of water was measured manually. Meteorological instruments were installed in the experimental field during hot pepper cultivation. Leaf area index increased during the growing stages where the highest LAI of 1.65 in the generative stage. The daily average of ET was 1.94 and EP was 6.71 mm resulting in low Kc. The Kc values were significantly different between stage to stage under T-test analysis (α = 0.05). Moreover, Kc in every stage could be related to soil water content (SWC) in logarithmic function. Totally, ET during hot pepper cultivation was 179.19 mm, while rainfall was 180.0 mm and irrigation water was 27.42 mm. However, there was a water shortages during vegetative and generative stages. This study suggested that consumptive water of hot pepper was complimented by soil and groundwater under the condition of water shortages in the vegetative and generative stages during the 2nddry season.