Table 2 Summary of measured parameters and associated statistical analysis at different stages of drought.

From: A relook into plant wilting: observational evidence based on unsaturated soil–plant-photosynthesis interaction

Different stages of drought

Parameters

Clay loam columns

Silty sand columns

1

2

3

Mean

% error

1

2

3

Mean

% error

Boundary effect zone

Suction values

Clay loam—11.9 kPa

Silty sand—5.1 kPa

Soil water content

32.9

34.5

32.7

33.4

2.26

44.6

46.8

47.4

46.3

2.37

Stomatal conductance

147.1

134.9

162

148.0

6.30

198

167

177

180.7

6.39

Photosynthetic efficiency

0.0342

0.0326

0.0373

0.0347

5.00

0.0598

0.0521

0.0548

0.055

5.08

Maximum CO2 fixation rate

5.26

5.03

5.76

5.35

5.09

14.13

12.78

14.49

13.80

4.92

Maximum yield

0.734

0.744

0.720

0.733

1.15

0.772

0.789

0.764

0.775

1.20

Effective yield

0.210

0.193

0.219

0.207

4.61

0.475

0.426

0.433

0.445

4.54

Leaf water content

0.79

0.81

0.83

0.81

1.64

0.80

0.83

0.84

0.823

1.88

Transition zone

Suction values

Clay loam—284.3 kPa

Silty sand—8.6 kPa

Soil water content

30.4

31.7

32.4

31.5

2.33

18

18.9

17.8

18.2

2.44

Stomatal conductance

86.8

76.1

89.1

84

6.26

128

136.1

113.7

125.9

6.49

Photosynthetic efficiency

0.038

0.034

0.037

0.036

5.01

0.0582

0.0497

0.0547

0.054

4.92

Maximum CO2 fixation rate

5.73

4.93

5.33

5.33

4.99

12.18

10.93

12.32

11.81

4.96

Maximum yield

0.733

0.747

0.722

0.734

1.08

0.741

0.757

0.764

0.754

1.15

Effective yield

0.287

0.254

0.263

0.268

4.72

0.469

0.412

0.433

0.438

4.71

Leaf water content

0.72

0.73

0.75

0.733

1.52

0.75

0.72

0.74

0.737

1.51

Residual zone

Suction values

Clay loam—1365

kPa

Silty sand—108.2

kPa

Soil water content

20.8

21.6

22.3

21.57

2.37

1.15

1.08

1.13

1.12

2.38

Stomatal conductance

36.5

38.1

32.2

35.60

6.36

37

36.6

31.7

35.1

6.45

Photosynthetic efficiency

0.0102

0.0112

0.0098

0.0104

5.12

0.0251

0.0246

0.0221

0.023

5.10

Maximum CO2 fixation rate

0.72

0.80

0.71

0.74

4.85

3.76

3.46

3.98

3.73

4.88

Maximum yield

0.184

0.186

0.180

0.183

1.21

0.616

0.632

0.612

0.62

1.29

Effective yield

0.036

0.037

0.041

0.038

4.91

0.164

0.152

0.144

0.153

4.64

Leaf water content

0.62

0.59

0.61

0.61

1.83

0.60

0.62

0.63

0.62

1.62

Back to article page