Optimization of the Regulated Deficit Irrigation Strategy for Greenhouse Tomato Based on the Fuzzy Borda Model

Xufeng Li, Juanjuan Ma, Lijian Zheng, Jinping Chen, Xihuan Sun and Xianghong Guo
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Xufeng Li: Shangqiu Station of National Field Agro-Ecosystem Experimental Network, Shangqiu 476000, China
Juanjuan Ma: College of Water Resource Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China
Lijian Zheng: Shangqiu Station of National Field Agro-Ecosystem Experimental Network, Shangqiu 476000, China
Jinping Chen: Shangqiu Station of National Field Agro-Ecosystem Experimental Network, Shangqiu 476000, China
Xihuan Sun: College of Water Resource Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China
Xianghong Guo: College of Water Resource Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China

Agriculture, 2022, vol. 12, issue 3, 1-16

Abstract: It is of great significance to explore the strategy of regulated deficit irrigation (RDI) under mulched drip irrigation to stabilize tomato yield and improve quality and efficiency. This experimental study was conducted on a drip-irrigated greenhouse in two consecutive years (2020 and 2021). Three deficit levels were set for the flowering and fruit development stage (Stage I), and three were set for the fruit-ripening stage (Stage II). As a combination evaluation method, the fuzzy Borda model was used to optimize the RDI strategy of greenhouse tomato. The results showed that the net photosynthetic rate, stomatal conductance, transpiration rate, and total shoot biomass of tomato decreased with an increase in the water deficit, while the intercellular CO 2 concentration had an opposite trend. The mild and moderate water deficit at Stage I reduced tomato yield by 16–24% and 30–40% compared to full irrigation. The water deficit at Stage II was able to improve various quality parameters and the water-use efficiency of tomato; the irrigation water-use efficiency (32.8–33.9 kg/m 3 ) and leaf water-use efficiency (3.2–3.6 μmol/mmol) were the highest when the soil water content was 70–90% θ f (field capacity) at Stage I and 40–60% θ f at Stage II (T3). Based on the fuzzy Borda combination evaluation model, T3 was determined as the treatment with stable yield, high quality, and efficient irrigation under the experimental conditions. The irrigation regime was as follows: irrigating 20–25 mm in the transplanting stage, no irrigation in the seedling stage, irrigating 193.2–220.8 mm at Stage I, and then irrigating 27.6 mm at Stage II.

Keywords: greenhouse tomato; regulated deficit irrigation; yield; quality; water-use efficiency; fuzzy Borda model (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
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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