Nghiên cứu bổ sung cơ sở khoa học về kỹ thuật trồng rừng phòng hộ trên các dạng lập địa chính vùng cát ven biển các tỉnh Hà Tĩnh, Quảng Bình và Quảng Trị - 25


> m1= rma(yi, vi, data = md)

> summary(m1)

Random-Effects Model (k = 9; tau^2 estimator: REML)


logLik

deviance

AIC

BIC

AICc

-16.3360

32.6720

36.6720

36.8309

39.0720

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Nghiên cứu bổ sung cơ sở khoa học về kỹ thuật trồng rừng phòng hộ trên các dạng lập địa chính vùng cát ven biển các tỉnh Hà Tĩnh, Quảng Bình và Quảng Trị - 25


tau^2 (estimated amount of total heterogeneity): 0.1611 (SE = 0.2193) tau (square root of estimated tau^2 value): 0.4014

I^2 (total heterogeneity / total variability): 41.26% H^2 (total variability / sampling variability): 1.70


Test for Heterogeneity:

Q(df = 8) = 20.4526, p-val = 0.0088


Model Results:


estimate

se

zval

pval

ci.lb

ci.ub


2.2336

0.2426

9.2051

<.0001

1.7580

2.7092

***


---

Signif. codes: 0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1


> forest(m1, slab = paste(md$Models, as.character(md$Year), sep = ", ")

,order=order(CG$Dairung), ilab.xpos=-0.5,xlab="Standarized Mean Differe nce (95% CI)", mlab="RE Model for All Studies",text(-100, 15, "Study", pos=4))

> md=escalc(n1i = N,n2i = N,m1i=E,m2i = E1,sd1i=se,sd2i=se1,data=CG,mea sure = "SMD",append=TRUE)


> summary(md)

Models Year Dairung N Vt st Vs ss

1

Que; Bach dan

2008

Bach dan

2

3.10

0.10

2.70

0.10

-0.13

0.01

2

Que; Keo chiu han

2008

Keo chiu han

2

3.35

0.21

2.90

0.14

-0.14

0.01

3

Thuyet & Hung; Keo chiu han

2005

Keo chiu han

3

5.50

0.10

1.27

0.21

-0.77

0.04

4

LA; Keo la liem

2018

Keo la liem

6

2.62

0.53

1.24

0.77

-0.53

0.27

5

Lieu; Keo la liem

2017

Keo la liem

9

7.16

0.11

5.53

0.81

-0.23

0.11

6

Que; Keo la tram

2008

Keo la tram

6

3.40

0.17

2.65

0.20

-0.22

0.04

7

Thuyet; Keo la tram

2004

Keo la tram

14

2.19

1.53

0.78

0.22

-0.49

0.28

8

Que; Klt+Kll

2008

Klt + Kll

2

3.70

0.10

2.50

0.10

-0.32

0.02

9

Que; Keo tai tuong

2008

Keo tai tuong

2

3.00

0.10

2.20

0.10

-0.27

0.03

10

Que; Phi lao

2008

Phi lao

4

3.40

0.29

2.35

0.29

-0.31

0.03

11

Thuyet; Phi lao

2004

Phi lao

41

4.84

1.28

2.18

0.91

-0.54

0.17

12

Thuyet & Hung; Phi lao

2005

Phi lao

2

5.50

0.10

1.60

0.10

-0.71

0.02

13

Que; Xoan AD

2008

Xoan AD

2

3.40

0.14

2.75

0.07

-0.19

0.01



E1

se1

K

sk

K1

sk1

yi

vi

sei

zi

pval

ci.lb

1

0

0

1.10

0.03

0

0

-10.3725

14.4486

3.8011

-2.7288

0.0064

-17.8226

2

0

0

1.15

0.07

0

0

-11.1704

16.5972

4.0740

-2.7419

0.0061

-19.1552

3

0

0

4.43

0.67

0

0

-21.7213

39.9846

6.3233

-3.4351

0.0006

-34.1148

4

0

0

4.00

4.96

0

0

-2.5616

0.6067

0.7789

-3.2886

0.0010

-4.0883

5

0

0

1.31

0.19

0

0

-2.8158

0.4425

0.6652

-4.2331

<.0001

-4.1195

6

0

0

1.28

0.04

0

0

-7.1773

2.4797

1.5747

-4.5578

<.0001

-10.2637

7

0

0

3.02

2.55

0

0

-2.4027

0.2459

0.4959

-4.8448

<.0001

-3.3747

8

0

0

1.50

0.04

0

0

-12.7662

21.3718

4.6230

-2.7615

0.0058

-21.8270

9

0

0

1.40

0.03

0

0

-7.1810

7.4458

2.7287

-2.6316

0.0085

-12.5291

10

0

0

1.48

0.05

0

0

-12.6937

10.5706

3.2513

-3.9043

<.0001

-19.0660

11

0

0

2.51

1.03

0

0

-4.4499

0.1695

0.4117

-10.8078

<.0001

-5.2569

12

0

0

3.40

0.50

0

0

-28.3249

101.2875

10.0642

-2.8144

0.0049

-48.0503

13

0

0

1.25

0.07

0

0

-15.1598

29.7275

5.4523

-2.7804

0.0054

-25.8461


> m1= rma(yi, vi, data = md)

> summary(m1)

Random-Effects Model (k = 13; tau^2 estimator: REML)


logLik

deviance

AIC

BIC

AICc

-39.2304

78.4607

82.4607

83.4306

83.7941


tau^2 (estimated amount of total heterogeneity): 18.8626 (SE = 10.9385) tau (square root of estimated tau^2 value): 4.3431


I^2 (total heterogeneity / total variability):

94.40%

H^2 (total variability / sampling variability):

17.86

Test for Heterogeneity:

Q(df = 12) = 57.0245, p-val < .0001


Model Results:



estimate

se

zval pval

ci.lb

ci.ub

-7.7614

1.4811

-5.2402 <.0001

-10.6643

-4.8585 ***


---

Signif. codes: 0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1

> summary(md)

Models Year Dairung N Vt st Vs ss E


1

Que; Bach dan

2008

Bach dan

2

3.10

0.10

2.70

0.10

-0.13

0.01

0

0

2

Que; Keo chiu han

2008

Keo chiu han

2

3.35

0.21

2.90

0.14

-0.14

0.01

0

0

3

Thuyet & Hung; Keo chiu han

2005

Keo chiu han

3

5.50

0.10

1.27

0.21

-0.77

0.04

0

0

4

LA; Keo la liem

2018

Keo la liem

6

2.62

0.53

1.24

0.77

-0.53

0.27

0

0

5

Lieu; Keo la liem

2017

Keo la liem

9

7.16

0.11

5.53

0.81

-0.23

0.11

0

0

6

Que; Keo la tram

2008

Keo la tram

6

3.40

0.17

2.65

0.20

-0.22

0.04

0

0

7

Thuyet; Keo la tram

2004

Keo la tram

14

2.19

1.53

0.78

0.22

-0.49

0.28

0

0

8

Que; Klt+Kll

2008

Klt + Kll

2

3.70

0.10

2.50

0.10

-0.32

0.02

0

0

9

Que; Keo tai tuong

2008

Keo tai tuong

2

3.00

0.10

2.20

0.10

-0.27

0.03

0

0

10

Que; Phi lao

2008

Phi lao

4

3.40

0.29

2.35

0.29

-0.31

0.03

0

0

11

Thuyet; Phi lao

2004

Phi lao

41

4.84

1.28

2.18

0.91

-0.54

0.17

0

0

12

Thuyet & Hung; Phi lao

2005

Phi lao

2

5.50

0.10

1.60

0.10

-0.71

0.02

0

0

13

Que; Xoan AD

2008

Xoan AD

2

3.40

0.14

2.75

0.07

-0.19

0.01

0

0


K

sk

K1

sk1

yi

vi

sei

zi

pval

ci.lb

ci.ub

1

1.10

0.03

0

0

29.2558

107.9875

10.3917

2.8153

0.0049

8.8884

49.6231

2

1.15

0.07

0

0

13.1081

22.4778

4.7411

2.7648

0.0057

3.8158

22.4004

3

4.43

0.67

0

0

7.4608

5.3053

2.3033

3.2391

0.0012

2.9464

11.9752

4

4.00

4.96

0

0

1.0524

0.3795

0.6160

1.7084

0.0876

-0.1550

2.2598

5

1.31

0.19

0

0

9.2851

2.6170

1.6177

5.7396

<.0001

6.1144

12.4557

6

1.28

0.04

0

0

41.7587

72.9912

8.5435

4.8878

<.0001

25.0138

58.5036

7

3.02

2.55

0

0

1.6260

0.1901

0.4360

3.7296

0.0002

0.7715

2.4805

8

1.50

0.04

0

0

29.9207

112.9058

10.6257

2.8159

0.0049

9.0947

50.7467

9

1.40

0.03

0

0

37.2346

174.3020

13.2024

2.8203

0.0048

11.3585

63.1107

10

1.48

0.05

0

0

36.3613

83.1342

9.1178

3.9880

<.0001

18.4908

54.2319

11

2.51

1.03

0

0

3.4139

0.1198

0.3462

9.8614

<.0001

2.7353

4.0924

12

3.40

0.50

0

0

5.4256

4.6797

2.1633

2.5081

0.0121

1.1857

9.6655

13

1.25

0.07

0

0

14.2479

26.3755

5.1357

2.7743

0.0055

4.1821

24.3137

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