Rubber Wood
In our Rubber Plantations we maintain 107 permanent sample plots (PSPs) which are located randomly. Growth measurements are taken annually and volumes are worked out.
Mean Annual Increment (MAI) 10.72m3 /ha / annum
Total Effective Rubber Extent 4036 ha
Rotation Age 30 year
Annual Allowable Cut (AAC) 43148 m3
Timber (Mix)
Mean Annual Increment (MAI) 13m3 / ha / annum
Total Effective Timber Extent 109.57 ha
Rotation Age 20 year
Annual Allowable Cut (AAC) 1424 m3
NTFP Rubber Latex
Lalan Rubbers Limited has a total of 5373.78 ha of Rubber Latex of which 3003 ha in revenue. Out of this an annual replanting extent of 4.5% of the total extent is being undertaken.
The replanting cycle of Rubber is 30 years. Rubber tapping is a commercial operation on sustainable yield basis and a set standard of exploitation is in force. A normal life span including the period and intensity of exploitation is given in the FMP in detail.
The company use clones recommended by RRISL (www.rrisl.lk ), CRI (www.cri.lk ), and TRI
Species Selection
When considering burning quality, fast growth and maximum yield per ha. In the shortest possible time, the following species have been selected for establishment of fuel wood / timber plantations on our estates.
| Eucalyptus grandis |
- Elevations over 1000 m. |
| E. tereticornis |
- Elevations of 300 - 1000 m. |
| Acacia mangium |
|
| Acacia auriculiformis |
|
| E. camaldulensis |
- Elevations below 300 m. |
| Casuarina equisitifolia |
|
| Tectona grandis |
|
| Swetenia mcrophylla |
|
| Alstonia macrophylla |
|
| Gliricedea sephium |
|
| PROVISIONAL GROWTH ANALYSIS |
AGE |
E grandis |
|
E camaldulensis |
Albezia |
|
Gravellea |
|
| |
E toreliana |
E robusta |
|
|
|
|
|
| |
E cirtidora |
|
|
|
|
|
|
|
| |
E microcoris |
|
|
|
|
|
|
|
DBH (cm) |
HT (m) |
DBH (cm) |
HT (m) |
DBH (cm) |
HT (m) |
DBH (cm) |
HT (m) |
4 |
4.71 |
4.42 |
6.13 |
4.97 |
18.27 |
11.83 |
3.23 |
3.4 |
6 |
13.32 |
8.85 |
9.1 |
7.1 |
21.2 |
15.46 |
9.66 |
7.36 |
8 |
19.43 |
11.99 |
12.07 |
9.22 |
24.12 |
18.04 |
14.22 |
10.17 |
10 |
24.16 |
14.42 |
15.04 |
11.35 |
27.05 |
20.04 |
17.77 |
12.35 |
12 |
28.03 |
16.41 |
18.01 |
13.47 |
27.97 |
21.63 |
20.66 |
14.13 |
14 |
31.31 |
18.09 |
20.98 |
15.6 |
32.9 |
23.05 |
23.11 |
15.64 |
16 |
34.14 |
19.55 |
23.95 |
17.72 |
35.82 |
24.24 |
25.22 |
16.95 |
18 |
36.64 |
20.82 |
26.92 |
19.85 |
38.75 |
25.3 |
27.09 |
18.1 |
20 |
38.88 |
21.98 |
29.89 |
21.7 |
41.68 |
20.24 |
28.77 |
19.13 |
22 |
40.9 |
23.02 |
32.86 |
27.1 |
44.6 |
27.9 |
30.28 |
20.06 |
24 |
42.75 |
23.97 |
35.83 |
26.23 |
47.53 |
27.87 |
31.66 |
20.91 |
26 |
44.45 |
24.85 |
38.8 |
28.35 |
50.45 |
28.59 |
32.93 |
21.69 |
28 |
46.02 |
25.65 |
41.77 |
30.48 |
53.38 |
29.25 |
34.1 |
22.42 |
30 |
47.49 |
26.41 |
44.74 |
32.6 |
56.3 |
29.87 |
35.2 |
23.09 |
32 |
48.86 |
27.11 |
47.71 |
34.73 |
59.23 |
30.45 |
36.22 |
23.72 |
34 |
50.14 |
27.77 |
50.68 |
36.85 |
62.15 |
30.9 |
37.19 |
24.31 |
36 |
51.36 |
28.4 |
53.65 |
38.98 |
65.08 |
31.5 |
38.09 |
24.87 |
38 |
52.51 |
28.99 |
56.62 |
41.1 |
68 |
31.99 |
38.95 |
25.4 |
40 |
53.59 |
29.55 |
59.59 |
41.23 |
70.93 |
32.45 |
39.76 |
25.9 |
42 |
54.63 |
30.08 |
62.56 |
45.35 |
73.85 |
32.88 |
40.54 |
26.38 |
44 |
55.62 |
30.59 |
65.53 |
47.4 |
70.78 |
33.3 |
41.28 |
26.83 |
By analyzing the 44 years data it is obvious that growth of Eucalyptus camaldulensis & Eucalyptus robusta are significantly higher than that of E grandis, E torellian, E citriodora & E microcorys.
Further E camaldulensis tolerates the climatic factors and soil factors of estates in Lalan Rubbers (Pvt) Ltd.
| Five Year Plan For The Company |
| |
Total Forest Ha. |
Total for Harvesting |
Total for Replanting |
Total
for New
planting |
| |
|
|
|
|
| 2009/10 |
|
|
|
|
| Latex Timber |
4036.00 |
8.66 |
0.00 |
135.74 |
| Timber/ Fuel wood |
109.57 |
0.00 |
0.00 |
0.00 |
| Conservation |
367.72 |
0.00 |
0.00 |
0.00 |
| Coconut |
393.33 |
0.00 |
0.00 |
0.00 |
| Tea |
44.85 |
0.00 |
0.00 |
0.00 |
| |
|
|
|
|
| 2009/10 |
|
|
|
|
| Latex Timber |
4163.08 |
50.98 |
0.00 |
168.26 |
| Timber/ Fuel wood |
109.57 |
0.00 |
0.00 |
0.00 |
| Conservation |
367.72 |
0.00 |
0.00 |
0.00 |
| Coconut |
393.33 |
0.00 |
0.00 |
0.00 |
| Tea |
44.85 |
0.00 |
0.00 |
0.00 |
| |
|
|
|
|
| 2010/11 |
|
|
|
|
| Latex Timber |
4280.36 |
110.30 |
8.66 |
102.46 |
| Timber/ Fuel wood |
109.57 |
0.00 |
0.00 |
0.00 |
| Conservation |
367.72 |
0.00 |
0.00 |
0.00 |
| Coconut |
393.33 |
0.00 |
0.00 |
0.00 |
| Tea |
44.85 |
0.00 |
0.00 |
0.00 |
| |
|
|
|
|
| 2011/12 |
|
|
|
|
| Latex Timber |
4281.18 |
93.20 |
50.98 |
42.12 |
| Timber/ Fuel wood |
109.57 |
0.00 |
0.00 |
0.00 |
| Conservation |
367.72 |
0.00 |
0.00 |
0.00 |
| Coconut |
393.33 |
0.00 |
0.00 |
0.00 |
| Tea |
44.85 |
0.00 |
0.00 |
0.00 |
| |
|
|
|
|
| 2012/13 |
|
|
|
|
| Latex Timber |
4281.08 |
167.58 |
110.30 |
27.93 |
| Timber/ Fuel wood |
109.57 |
0.00 |
0.00 |
0.00 |
| Conservation |
367.72 |
0.00 |
0.00 |
0.00 |
| Coconut |
393.33 |
0.00 |
0.00 |
0.00 |
| Tea |
44.85 |
0.00 |
0.00 |
0.00 |
| FIVE YEAR TOTAL |
5196.55 |
430.72 |
169.94 |
476.51 |
|
