Table 3 Variance analysis of the factorial design of soybean growth/yield and disease index of soybean root rot.

From: Effects of Rhizophagus intraradices on soybean yield and the composition of microbial communities in the rhizosphere soil of continuous cropping soybean

Index

Source

Sum of squares

df

Mean square

F-value

P-value

Significance level

100-seed weight (g)

Y

97.242

1

97.242

3076.471

0.000

**

I

29.705

1

29.705

939.769

0.000

**

Y × I

0.062

1

0.062

1.950

0.200

 

Error

0.253

8

0.032

   

Total

6537.051

12

    

Seed-yield per plant (g)

Y

90.365

1

90.365

95.069

0.000

**

I

21.520

1

21.520

22.641

0.001

**

Y × I

1.577

1

1.577

1.659

0.234

 

Error

7.604

8

0.951

   

Total

5066.553

12

    

Yield per 0.04 hectare (kg)

Y

235.056

1

235.056

317.815

0.000

**

I

49.654

1

49.654

67.136

0.000

**

Y × I

4.826

1

4.826

6.525

0.034

*

Error

5.917

8

0.740

   

Total

12,949.012

12

    

Pods per plant

Y

865.471

1

865.471

274.178

0.000

**

I

277.345

1

277.345

87.862

0.000

**

Y × I

6.264

1

6.264

1.984

0.197

 

Error

25.253

8

3.157

   

Total

47,001.504

12

    

Seed number per plant

Y

4107.000

1

4107.000

130.037

0.000

**

I

1541.333

1

1541.333

48.802

0.000

**

Y × I

3.000

1

3.000

0.095

0.766

 

Error

252.667

8

31.583

   

Total

199,452.000

12

    

Seed number per pod

Y

2.341

1

2.341

6.399

0.035

*

I

1.841

1

1.841

5.032

0.055

 

Y × I

0.141

1

0.141

0.385

0.552

 

Error

2.927

8

0.366

   

Total

75.890

12

    

Node number

Y

8.979

1

8.979

16.820

0.003

**

I

2.306

1

2.306

4.319

0.071

 

Y × I

0.247

1

0.247

0.462

0.516

 

Error

4.271

8

0.534

   

Total

1739.005

12

    

Branch number

Y

11.643

1

11.643

48.939

0.000

**

I

6.337

1

6.337

26.635

0.001

**

Y × I

0.032

1

0.032

0.135

0.723

 

Error

1.903

8

0.238

   

Total

807.883

12

    

Plant height (cm)

Y

124.099

1

124.099

85.049

0.000

**

I

222.655

1

222.655

152.592

0.000

**

Y × I

8.961

1

8.961

6.142

0.038

*

Error

11.673

8

1.459

   

Total

82,149.674

12

    

Root fresh weight (g)

Y

46.217

1

46.217

62.788

0.000

**

I

51.295

1

51.295

69.687

0.000

**

Y × I

4.142

1

4.142

5.627

0.045

*

Error

5.889

8

0.736

   

Total

1807.576

12

    

Shoot fresh weight (g)

Y

926.642

1

926.642

327.580

0.000

**

I

785.863

1

785.863

277.813

0.000

**

Y × I

19.892

1

19.892

7.032

0.029

*

Error

22.630

8

2.829

   

Total

119,456.143

12

    

Root rot disease index

Y

0.307

1

0.307

433.694

0.000

**

I

0.276

1

0.276

389.694

0.000

**

Y × I

0.024

1

0.024

34.306

0.000

**

Error

0.006

8

0.001

   

Total

9.080

12

    
  1. Y represents continuous cropping regimes. I represents inoculated with R. intraradices.
  2. *Factors are significant at P < 0.05 level.
  3. **Factors are significant at P < 0.01 level.
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