Stem cut propagation technology for rubber (Hevea brasiliensis) tree species

Dr. Onofre S. Corpuz

POTENTIALS OF THE KNOWN WHITE GOLD TREE SPECIES

(Hevea brasiliensis) STEMCUT FOR MASS PROPAGATION

DR. ONOFRE S. CORPUZAsso. Prof. CFCST- College of Agriculture

Introduction

• Rubber is a seasonal tree species known to be the white gold tree in Mindanao

• Nurserymen/planters could hardly provide means of producing planting materials off season

• Thus this study try to find alternative methods of producing planting materials

• Results will help rubber planters and nurserymen to cope with the shortage of rubber planting materials during off seasons.


Objective

• To find out the success of stem cut rubber through survival rate, sprouts and rooting potentials as influence by stem cut parts, rate of growth hormones and time of soaking


Conceptual Framework .

Stem Cut Parts

• Brown• Green

Stem Cut Success

• Survival• Sprouting

• Root growth

Rubber (Hevea

brasiliensis) Source

Tree - RRIM

600



RESEARCH METHODS

• Conducted at CFCST from July 17 to October 2, 2011

• 180 stem cut (green and brown stem) at 1foot length

• Stem cut were soak in water with ANAA at different concentrations such as 1tbsp/litH2O and 1tbsp/3litH2O including control treatment (no application).

• After soaking at decided number of hours (0 hours as control, 6hrs and 12 hours) stem cut were planted on poly bag soil filled with sandy clay soil at a ratio of 1:2. The experiment is arranged in a split-split plot design

Results

Table 1. Survival rate of stem cut rubber after 75 days as influenced by stem parts and levels of ANAA

Treatment Percent

Stem PartsGreenBrown

40.67a74.00b

Levels of ANAA

No Application1tbsp/1lit.H2O1tbsp/3lit.H2O

48.30a58.30ab65.80b

Mean with the same letter subscript are not significantly different at 5% level


Survival Rate

Sprouting

Stem Parts

17 Days

45 Days

60 Days

75 Days

GreenBrow

n

6.267a

3.800b

5.800a

8.067b

5.000a

7.467b

4.067a

7.400b


Table 2. Sprouting potentials of stem cut rubber as influenced by stem parts

Table 3. Sprouting potentials of stem cut

rubber as influenced by levels of ANAA

Levels of ANAA

17 Days

45 Days

60 Days

75 Days

No Application

1tbsp/1lit.H2O

1tbsp/3lit.H2O

3.083a

7.000b

5.00ab

6.083a

7.500b

7.500b

5.167a

7.250b

6.33ab

4.83a

5.83ab

6.58b


Sprouting

Length of Sprout

Table 4. Length of sprout (cm) after 75 days as

Factors Treatment Mean

Stem Parts Green

Brown

5.7644a

12.700b

Levels of

ANAA

No

Application

1tbsp/

1lit.H2O

1tbsp/

3lit.H2O

9.733a

9.436a

8.778a


Rooting Growth Potentials

Stem Parts

No.of Roots

Length of Root

(cm)

No. of Secondary Roots

Green

Brown

2.0

2.24

4.65a

6.66b

5.4a

8.95b


Table 5. Rooting potentials of stem cut rubber as affected by stem parts

Table 6. Rooting potentials as influenced by levels of ANAA

Levels of ANAA

No. of Roots

Length of Root (cm)

No. of Secondary

Roots

No

Application

1tbsp/

1lit.H2O

1tbsp/

3lit.H2O

2.22a

2.84a

4.40b

7.389a

7.632a

9.544b

7.286a

8.867a

9.125a


Mean with the same letter subscript are not significant at 5% level

Root Growth Potentials

Conclusion

Older/brown stem parts performed significantly better Lower concentration of ANAA (1tbsp/3lit.H2O) performed betterTime of soaking did not significantly influenced sprouting and rooting potentials Stem cut rubber can be mass propagated as an alternative planting materials


Potential Impact and Recommendations

Stem cut rubber tree can be propagated Brown/older stem parts1tbsp/3lit.H2O ANAATrials with other parameters and treatments such as different watering frequency, varied temperature and shading intensity, soil medium, length of cuttings, varietal source, other growth hormones, time of cutting collections , position of planting and age of mother plant/source treeSuccessful stem cut in the study should be outplanted for field trials


Thank You!!!


Technology

Stem cut propagation technology for rubber (Hevea brasiliensis) tree species