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Crop : Sugarcane.

Field : Agronomy.

Collaborator : Self

Title : Optimisation of Space Requirement for High Tillering Variety.

Author : R.Narasimhan and G.S.C. Rao.

Year : 1981

Under this programme spacing trial was conducted with Co 997 with 5 inter row spacing (30, 45, 60, 75 and 90 cms) in randomised block design. The height at 8 months flowering and juice quality at 12 months age were collected and presented in Table 8:1. The yield and millable cane data observed at final harvest are appended in Table 8:2, 8:3. Although the yield differences were not statistically significant among the spacings, millalble cane number per hactare was significantly higher in 45, 60 cm spacings as compared to 30 cm spacing. The millable cane number were significantly lower in 75 and 90 cm spacing as compared 45, 60 cm spacing due to decrease in number of plants per hactare. The results suggested high tillering genotypes like Co 997 require inter plant spacings if 45 and 60 cms.

SPACING TRIAL OF CO. 997

TABLE - 8:1. Data Showing Effect of Plant Spacing on Height Flowering and Juice Quality.

1. Treatment : 5

5. Design : Randomised block design

2. Replication : 2

6. Date of Planting : 21st July 1980

3. Plot Size : 145.8 Sqm.

7. Date of Harvesting : 24-12-1981.

4. Variety : Co 997

           

Treatments

Height in

% Flower-

Juice quality 12 months

  
 

meters at

ing.

Brix

Pol %

Purity

   
 

(Mean of

          
  

60 canes)

          

30 cms.

2.11

53.1

18.12

15.41

84.98

  

45 cms.

2.06

50.9

17.18

14.67

85.40

  

60 cms.

1.91

50.0

17.49

15.02

85.90

  

75 cms.

1.85

49.2

18.62

15.96

85.68

  

90 cms.

1.77

47.6

17.81

15.21

85.32

  

SPACING TRIAL OF CO. 997

TABLE - 8:2. Data Showing Yield Qtls/ha.

1. Treatment : 5

5. Design : Randomised block design

2. Replication : 2

6. Date of Planting : 21st July 1980

3. Plot Size : 145.8 Sqm.

7. Date of Harvesting : 24-12-1981.

4. Variety : Co 997

        

8:2-1. Yield Qtls/ha.

Sl.No.

Treatments

R-I

R-II

Total

Mean

  

1

30 cms.

15.88

15.16

31.04

15.52

  

2

45 cms.

18.66

18.84

37.50

18.52

  

3

60 cms.

19.03

17.20

36.23

18.11

  

4

75 cms.

16.73

19.52

36.25

18.12

  

5

90 cms.

15.79

17.46

33.25

16.62

  
 

Total

86.09

88.18

174.27

87.12

  
 

Mean

17.21

17.63

34.85

17.42

  

8:2-2. Analysis of variance.

Source of

Degrees of

Sum of

Mean sum

'F' calcula

'F' Table value

variation

freedom

squares

of squares

ted values

5%

1%

Rep.

1

0.43

0.43

0.0993

7.71

21.20

Treatments

4

13.93

3.495

0.8071

6.39

15.98

Error

4

17.34

4.33

      

Total

9

          

'F' Test indicates non significants.

      

8:2-3. Summary of Results.

Sl.No.

Treatments

Mean yield tonnes/ha

      

1

30 cms.

106.51

        

2

45 cms.

128.66

        

3

60 cms.

124.30

        

4

75 cms.

124.38

        

5

90 cms.

114.09

        

SPACING TRIAL OF CO. 997

TABLE - 8:3. Data Showing Millable Canes ha-1.

1. Treatment : 5

  

5. Design : Randomised block design

2. Replication : 2

  

6. Date of Planting : 21st July 1980

  

3. Plot Size : 145.8 Sqm.

7. Date of Harvesting : 24-12-1981.

  

4. Variety : Co 997

          

8:3-1. Millable Canes ha-1.

Sl.No.

Treatments

R-I

R-II

Total

Mean

  

1

30 cms.

1.24

1.39

2.63

1.32

  

2

45 cms.

1.43

1.48

2.91

1.45

  

3

60 cms.

1.44

1.44

2.88

1.44

  

4

75 cms.

1.37

1.40

2.77

1.39

  

5

90 cms.

1.18

1.19

2.37

1.19

  
 

Total

6.66

6.90

13.56

6.79

  
 

Mean

1.33

1.38

2.71

1.35

  

8:3-2. Analysis of variance.

Source of

Degrees of

Sum of

Mean sum

'F' calcula

'F' Table value

variation

freedom

squares

of squares

ted values

5%

1%

Rep.

1

0.0057

0.0057

4.07

    

Treatments

4

0.0972

0.0243

17.3571**

5.19

11.39

Error

5

0.0073

0.0014

17.35

    

Total

10

          

'F' Significant at 1% level.

      

8:3-3. Summary of Results.

Spacing

  

30 cms

45 cms

60 cms

75 cms

90 cms

Millable canes per

          

hacter.

  

13200

14500

14400

13900

11900
 

C.D. for treatments = 0.1542.

       

R.C.P. 06. Co 62175 Mill Test.

Big mill trial of Co 62175 was conducted on 2nd December 1981 to evaluate the commercial performance of this variety during main season. Mill trial results were compared to that day's commercial cane quality characteristics. Despite pol% bagasse being high, the expected recovery of Co 62175 was 11.04 as compared to 10.55 which was higher than that day's recovery (Tables 9:1 and 9:2). Fibre % cane was 1.56 units lower than that of the control. The mill trial results suggested that Co 62175 in addition to high yielding, is superior in quality at 12 months.

MILL TEST OF CO. 62175

TABLE - 9:1. Big Mill Trial of Co.62175.

Date : 2-12-1981.

  

Age of Crop : 12 Months.

  

1. Quantity of cane crushed

  

: 101.934 MT

  

2. Quantity of MJ : Gross

  

: 98.200 MT

  

3. Quantity of MJ : Net

    

: 97.955 MT

  

4. Quantity of Imbibition water

  

: 25.200 MT

  

5. Quantity of Bagasse

    

: 28.934 MT

  

6. M.J. % Cane Gross

    

: 96.34

    

7. M.J. % Cane Net

    

: 96.10

    

8. Added water % cane

    

: 24.72

    

9. Bagasse % cane

    

: 28.39

    

10. Mill Extraction

    

: 93.18

    

11. Java Ratio

    

: 84.64

    

12. Pol % cane

    

: 13.34

    

13. Recovery % cane

    

: 11.04

    

14. Undiluted Juice lost % Fibre

  

: 44.69

    

15. R.M.E.

        

: 93.62

    

16. Absolute Juice % cane

  

: 86.76

    

17. Added water % fibre

    

: 186.70

    

18. Fibre % cane

     

: 13.24

      

19. Added water extracted in MJ% cane

: 15.18

    

20. E.R.Q.V. MJ

    

: 96.11

    

PJ

        

21. E.R.Q.V. LMJ

    

: 82.41

    

PJ

        

22. Primary Extraction

    

: 64.77

    
               

A. Juice Average Analysis.

   

Brix

Pol %

Purity

Mill

            

1st Mill

      

18.96

15.76

83.56

2nd Mill

      

13.06

10.43

79.86

3rd Mill

      

6.68

5.09

76.19

4th Mill

      

3.83

2.83

73.89

M.J.

      

15.88

12.93

81.42

B. Bagasse Analysis.

     

Pol %

Moisture%

     

1st Mill

      

7.78

60.5

  

2nd Mill

      

5.53

58.5

  

3rd Mill

      

3.36

55.2

  

4th Mill

      

3.22

49.0

  

C. Prepared Cane.

    

Pol %

Moisture%

Fibre
       

13.20

70.5

13.00
 

(Done in Rapipol Extractor).

      

Observations.

           

1. As the feeding was not uniform. So pol% bagasse is at higher side as compared to usual crushing rate.

MILL TEST REPORT OF CONTROL

TABLE - 9:2. Big Mill Trial of Control.

Date : 2-12-1981.

               

1. Quantity of cane crushed

  

: 2180.000 MT

  

2. Quantity of MJ : Gross

  

: 2040.000 MT

  

3. Quantity of MJ : Net

    

: 2034.335 MT

  

4. Quantity of Imbibition water

   

: 548.100 MT

  

5. Quantity of Bagasse

     

: 687.644 MT

  

6. M.J. % Cane Gross

     

: 93.60

    

7. M.J. % Cane Net

    

: 93.32

    

8. Added water % cane

    

: 25.14

    

9. Bagasse % cane

    

: 31.54

    

10. Mill Extraction

    

: 92.95

    

11. Java Ratio

    

: 82.73

    

12. Pol % cane

     

: 12.79

    

13. Recovery % cane

    

: 10.55

    

14. Undiluted Juice lost % Fibre

  

: 40.59

    

15. R.M.E.

      

: 94.20

    

16. Absolute Juice % cane

  

: -

    

17. Added water % fibre

    

: 169.88

    

18. Fibre % cane

    

: 14.80

    

19. Added water extracted in MJ% cane

: -

    

20. E.R.Q.V. MJ

    

: 95.37

    

PJ

          

21. E.R.Q.V. LMJ

    

: 82.87

    

PJ

          

22. Primary Extraction

    

: -

    

A. Juice Average Analysis.

   

Brix

Pol %

Purity

Mill

              

1st Mill

      

18.35

15.46

83.56

2nd Mill

      

-

-

-

3rd Mill

      

-

-

-

4th Mill

      

4.39

3.28

74.71

M.J.

      

15.6

12.74

81.67

B. Bagasse Analysis.

    

Pol %

Moisture%

   

1st Mill

      

-

-

  

2nd Mill

      

-

-

  

3rd Mill

      

-

-

  

4th Mill

          

2.86

49.3

  

C. Prepared Cane.

      

Pol %

Moisture%

Fibre
          

-

-

-

 

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