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Crop : Sugarcane

Field : Plant Physiology

Collaborator : Self

Title : Growth Analysis during Juvenile Stages of Sugarcane Growth

Author : R.Narasimhan,R .S.Sachan,G.S.C.Rao, A.T. Yaragattikar and R.G.Menon

Year : 1979

In order to findout the patterns of dry matter production and its partitioning, a time course study was carriedout with two early varieties Co 6415 and Co 997. The experiment was initiated on 30th July 1979 and at every week growth analysis were done for whole plant. After 10th occassion the duration of sampling was extended to two weeks. Results represented in Table 6. Showed variations in total dry matter and partitioning in two genotypes grown under same environment and crop management. Co 6415 observed to produce more dry matter per m-2 land than Co 997. Partitioning of total photosynthate was calculated on organic carbon basis.

TABLE - 6. TOTAL DRY MATTER PRODUCTION OF ITS PARTITIONING DURING JUVENILE PHASE OF SUGARCANE GROWTH.

Varieties : Co 6415, Co 997

Replications : Three

Layout : Flat square with 50 cm x 50 cm spacing.

Date of Planting : 30-6-1979.

Total Dry Matter Kg.m-2
   

Co 997

Age in days after planting

Stem

Shoot

Stem

30

  

-

7.83

-

37

  

-

14.25

-

44

  

-

27.34

-

51

  

-

51.43

-

58

  

-

91.72

-

64

  

8.22

235.61

22.53

70

  

19.32

248.83

29.53

79

  

30.33

306.54

44.57

86

  

59.03

500.82

96.01

93

  

265.38

552.89

175.96

107

   

484.82

933.83

393.46

121

  

1037.59

1412.22

527.12

135

  

1541.47

1729.16

1059.66

149

  

2332.08

1699.02

1209.38

165

  

2890.95

2094.29

1884.40

It can be seed from Table - 7:1, 7:2 that:

  1. Ratio of storage organic carbon dry matter to structural organic carbon dry matter was found to be 0.9 to 1.0 in shoot and 1.5 to 2.0 in stalk.

  2. When stalk dry matter taken as storage, the ratio was around 1.0 till 10th occassion and after that partitioning favoured the storage dry matter.

  3. On whole plant basis the partition of dry matter was exactly 50:50 between storage and structural.

All the above results suggest that the total dry matter produced by cane plant, there is a definite partitioning into storage and structural right from juvenile stages.

Further studies are essential to understand the more complex behaviour of partitioning.

TABLE - 7:1. DATA ON DRY MATTER EXPRESSED AS ORGANIC CARBON M-2 ON SUCCESSIVE OCCASIONS.

 

VARIETY : CO. 6415 ( ALL VALUES PARTAIN TO ORGANIC CARBON).

   
   

Storage organic carbon dry matter

       

Occasion

Age of

structural organic carbon dry matter

Leaf Wt.

St. Leaf

Stem/

Stem/

  

plant in

Shoot

Stem

Stem D.M

Whole

Plant Wt.

Wt./plant

leaf

plant

 

days

taken as

Plant

           
         

storage

              

1

30

0.9192

-

-

0.9192

1.0000

0.5211

-

-

2

37

0.5410

-

-

0.5410

1.0000

0.6489

-

-

3

44

1.0180

-

-

1.0180

1.0000

0.4955

-

-

4

51

1.0525

-

-

1.0525

1.0000

0.4872

-

-

5

58

1.0511

-

-

1.0511

1.0000

0.4875

-

-

6

65

0.9764

1.4897

1.0758

0.9967

0.9521

0.4817

0.0503

0.0489

7

72

0.9392

1.9066

1.0496

0.9746

0.9461

0.4879

0.5070

0.0539

8

79

0.9589

1.1169

1.1054

0.9673

0.9426

0.4812

0.0609

0.0574

9

86

0.8797

1.6079

1.0721

0.9297

0.9071

0.4826

0.1024

0.0929

10

93

0.9195

1.8253

1.6311

1.1017

0.7295

0.3801

0.3708

0.2705

11

107

1.2522

1.8711

2.3249

1.4205

0.6774

0.3008

0.4763

0.3227

12

121

1.2476

2.8490

3.1509

1.7773

0.8416

0.2410

0.8463

0.4584

13

135

1.4253

2.5646

4.1838

1.9207

0.4679

0.1929

1.1373

0.5321

14

149

0.8920

1.7101

3.8232

1.3171

0.3923

0.2073

1.5493

0.6077

15

163

0.8734

1.4782

3.8304

1.2024

0.3870

0.2070

1.5785

0.6122

TABLE - 7:2. DATA ON DRY MATTER EXPRESSED AS ORGANIC CARBON M-2 ON SUCCESSIVE OCCASIONS. VARIETY : CO. 997 ( ALL VALUES PARTAIN TO ORGANIC CARBON).

  
    

Storage organic carbon dry matter

         

Occasion

Age of

structural organic carbon dry matter

Leaf Wt.

St. Leaf

Stem/

Stem/
  

plant in

Shoot

Stem

Stem D.M

Whole

Plant Wt.

Wt./plant

leaf

plant
   

days

taken as

Plant

               
       

storage

                  

1

30

1.012

-

-

1.012

1.0000

0.4971

-

-

2

37

0.758

-

-

0.758

1.0000

0.5689

-

-

3

44

1.139

-

-

1.139

1.0000

0.4675

-

-

4

51

1.073

-

-

1.073

1.0000

0.4823

-

-

5

58

0.876

-

-

0.876

1.0000

0.5332

-

-

6

65

0.868

1.604

1.060

0.9734

0.9344

0.5001

0.1024

0.0960

7

72

1.054

1.796

1.290

1.1115

0.8968

0.4367

0.1150

0.1032

8

79

0.878

1.608

1.141

0.9448

0.8773

0.4672

0.1398

0.1227

9

86

0.814

1.956

1.202

0.9463

0.8239

0.4542

0.2138

0.1762

10

93

1.112

2.023

1.832

1.2872

0.7459

0.3531

0.3407

0.2541

11

107

1.134

2.001

1.310

1.3276

0.7115

0.3335

0.4055

0.2885

12

121

1.141

2.219

1.818

1.3284

0.7597

0.3548

0.3163

0.2403

13

135

1.387

1.939

2.722

1.5596

0.6413

0.2686

0.5593

0.3587

14

149

0.768

1.550

2.111

1.0381

0.5685

0.3214

0.7590

0.4315

15

163

0.836

1.397

2.552

1.0706

0.5172

0.2816

0.9336

0.4828

 

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