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Table 4

Water use efficiency (WUE) and total net water (NWT) in three crops, tomatoes, cucumbers, and lettuce, under three production systems: soil (SPS), open (OPS), and closed (CPS)

Production systemWUE (kg m−3)
NWT (m3 ha−1)
TomatoCucumberLettucePolycultureTomatoCucumberLettucePolyculture
SPS 27.10 ± 0.30 a 62.98 ± 5.48 b 32.08 ± 2.64 b 40.72 ± 1.24 b 5,292.00 1,922.10 1,423.28 2,879.13 
OPS 21.81 ± 0.49 b 48.11 ± 1.96 c 35.77 ± 3.90 b 35.23 ± 1.14 c 4,742.63 2,260.25 1,912.5 2,971.79 
CPS 26.74 ± 1.45 a 88.82 ± 3.18 a 49.00 ± 2.91 a 54.85 ± 1.16 a 4,067.78 1,472.83 1,281.53 2,274.05 
Production systemWUE (kg m−3)
NWT (m3 ha−1)
TomatoCucumberLettucePolycultureTomatoCucumberLettucePolyculture
SPS 27.10 ± 0.30 a 62.98 ± 5.48 b 32.08 ± 2.64 b 40.72 ± 1.24 b 5,292.00 1,922.10 1,423.28 2,879.13 
OPS 21.81 ± 0.49 b 48.11 ± 1.96 c 35.77 ± 3.90 b 35.23 ± 1.14 c 4,742.63 2,260.25 1,912.5 2,971.79 
CPS 26.74 ± 1.45 a 88.82 ± 3.18 a 49.00 ± 2.91 a 54.85 ± 1.16 a 4,067.78 1,472.83 1,281.53 2,274.05 

The data represent the mean ± standard error (n = 8). Different letters within a column indicate significant differences (p < 0.05). The polyculture is the mean ± standard error of the tomato, cucumber, and lettuce variables within a production system.

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