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Crop : Sugarcane

Field : Agronomy

Collaborator : Self

Title : Studies on response of Co 85246 to various agronomic practices.

Author : R. B. Khandgave and P.G. Satpute.

Year : 1996-97

This experiment was carried out to ascertain suitable seed rate and nitrogen levels for Co 85246. The experiment was laid out on 21st September 1995 in Randomized  Block Design with three replications. In this trial, three levels of seed rate viz., S0 = 56,250 (25% less than the recommended), S1 = 75,000 (recommended) and S2 = 1,12,500 (50% more than the recommended) eye buds per ha and also three levels of nitrogen viz., N0 = 187.5 (25% less than the recommended) N1 = 250 (recommended) and N2 = 375 Kg N/ha (50% more than the recommended) were applied. The results obtained for various parameters are elucidated below.

OBSERVATIONS

a) Yield and yield attributes.

The observations on germination percentage, cane formed shoots (lakh/ha), plant height (cm), number of internodes, number of millable canes ('ooo/ha), cane yield (MT/ha) C.C.S yield (MT/ha) etc. are given in Table 3.

b) Quality parameters.

Juice quality parameters viz., Brix, Pol and Reducing Sugars percentage showed non-significant results due to various levels of seed rate and nitrogen. Similar trend was also recorded with respect to fibre and moisture content. Interaction effect of all parameters showed non-significant results.

RESULTS

The observations (Table 4) revealed that the cane formed shoots and NMC were found to be higher with higher seed rate i.e1,12,500 per ha. However the positive effect of these parameters failed to produce higher cane yield and CCS yields. Significantly higher cane yields and CCS yields were obtained due to usage of 75,000 eye buds per ha. Hence this seed rate is found optimum for getting higher cane as well as CCS yields in Co 85246. Higher dose of nitrogen produced higher cane yield i.e 375 Kg N/ha. But the results were non-significant. Therefore the optimum dose of nitrogen for Co 95246 is 250 Kg N/ha. This level of nitrogen produced higher CCS yield also. From the juice quality point of view, none of the parameters were influenced due to varied seed rate. However higher nitrogen level reduced Pol percentage though non-significant, but it definitely influenced in reducing the CCS yields. Therefore further increase of nitrogen beyond 250 Kg N/ha will have detrimental effect on pol percentage in the variety Co 85246.

Table 3. EFFECT OF SEED RATES AND NITROGEN LEVELS ON SUGARCANE YIELD AND YIELD ATTRIBUTES (Cv. CoC 85246) (1996-97)

Treatment

Germination

Cane formed shoots

Plant hieght

No. of internodes

N.M.C

Cane yield

C.C.S. yield
    

(%)

(Lakh/ha)

(Cm)

           

( ' 000/ha)

(Mt/ha)

(Mt/ha)

Seed rate

                                                                           

S0

80.76

     

1.12

     

192.78

     

19.04

     

77.09

     

85.63

     

10.27

     

S1

80.59

      

1.49

      

182.78

      

20.39

      

82.48

      

98.04

      

11.83

      

S2

79.18

      

1.71

      

177.21

      

20.49

      

85.98

      

91.23

      

10.94

      

N-Levels

                                                               

NO

79.15

    

1.42

    

178.14

    

19.56

    

79.44

    

87.45

    

10.61

    

N1

80.58

     

1.51

     

188.49

     

20.6

     

81.37

     

93.32

     

11.38

     

N2

50.81

    

1.52

    

191.13

    

19.74

    

82.73

    

95.64

    

11.26

    
    

SEm+

CD (5%)

SEm+

CD (5%)

SEm+

CD (5%)

SEm+

CD (5%)

SEm+

CD (5%)

SEm+

CD (5%)

SEm+

CD (5%)

S

0.776

NS

0.061

0.183

5.615

NS

0.499

NS

1.652

4.791

1.762

5.268

0.068

0.203

N

0.775

NS

0.061

NS

5.615

NS

0.499

NS

1.652

NS

1.762

5.268

0.068

0.203

NXS

1.344

NS

0.106

NS

9.725

NS

0.865

NS

2.862

NS

2.783

NS

0.117

NS

Table 4. EFFECT OF SEED RATES AND NITROGEN LEVELS ON SUGARCANE QUALITY PARAMETERS Co85246 (1996-97)

Treatment

Brix

Pol

Reducing sugars

Fibre

Moisture
    

(%)

(%)

(%)

(%)

(%)

Seed rate

                                                        

S0

18.45

     

16.09

     

0.772

     

14.21

     

70.00

     

S1

18.00

      

16.01

      

0.832

      

14.17

      

70.11

      

S2

18.26

      

15.98

      

0.832

      

14.04

      

70.33

      

N-Levels

                                                 

NO

18.48

    

16.17

    

0.667

    

14.03

    

69.89

    

N1

18.09

     

16.25

     

0.708

     

14.21

     

69.78

     

N2

18.14

     

16.66

    

0.853

    

14.18

    

70.78

    
    

SEm+

CD (5%)

SEm+

CD (5%)

SEm+

CD (5%)

SEm+

CD (5%)

SEm+

CD (5%)

S

0.34

NS

0.284

NS

0.092

NS

0.087

NS

0.429

NS

N

0.34

NS

0.284

NS

0.092

NS

0.087

NS

0.429

NS

NXS

0.589

NS

0.492

NS

0.16

NS

0.150

NS

0.740

NS

 

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