Light Interception and Radiation Use Efficiency of Cassava under Irrigated and Rainfed Conditions and Seasonal Variations

Supattra Mahakosee, Sanun Jogloy, Nimitr Vorasoot, Piyada Theerakulpisut, Carl Corley Holbrook, Craig K. Kvien and Poramate Banterng
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Supattra Mahakosee: Department of Agronomy, Faculty of Agriculture, Khon Kaen University, Khon Kaen 40002, Thailand
Sanun Jogloy: Department of Agronomy, Faculty of Agriculture, Khon Kaen University, Khon Kaen 40002, Thailand
Nimitr Vorasoot: Department of Agronomy, Faculty of Agriculture, Khon Kaen University, Khon Kaen 40002, Thailand
Piyada Theerakulpisut: Department of Biology, Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand
Carl Corley Holbrook: USDA-ARS, Crop Genetics and Breeding Research Unit, Coastal Plain Experimental Station, Tifton, GA 31793, USA
Craig K. Kvien: Crop & Soil Sciences, The University of Georgia, Tifton, GA 31793, USA
Poramate Banterng: Department of Agronomy, Faculty of Agriculture, Khon Kaen University, Khon Kaen 40002, Thailand

Agriculture, 2022, vol. 12, issue 5, 1-14

Abstract: Determining the effect of irrigated and rainfed conditions on light interception, light extinction coefficient ( k ), radiation use efficiency (RUE), biomass, and storage root accumulation of cassava was the objective of this study. The field experiment was arranged in a randomized complete block design (RCBD) with four replications. The effect of irrigated and rainfed water conditions in cassava were evaluated under two planting dates for two years. Light interception depended on k and LAI which affected solar radiation accumulation and thus biomass production for cassava. The k values ranged from 0.49 to 0.93 a nd 0.46 to 0.86 for irrigated and rainfed crops, respectively. The RUE bi and RUE sr depended on water conditions and crop growth stages and seasons, whereas rainfed crops in the May planting were slightly lower in RUE bi than irrigated crops. RUE bi of the crop planted in November was not significantly different for irrigated and rainfed crops. Irrigation at the late growth stage could maintain higher LAI, light interception, and RUE for the crop planted in May, whereas those in November planting were not significantly different.

Keywords: solar radiation; light interception; leaf area index; extinction coefficient; water stress (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2022
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