Posts Tagged Dendrocalamus Stocksii

Iron Bamboo Nurseries- Guroo Farms

Due to a proposed restriction on export of Shisham, we have, over the last 2 years, established an experimental Bambusetum, of about 8 bamboo species, including 2 of the rare Iron Bamboo varieties, namely, Dendrocalamus Stocksii and Thyrostachys Oliverii at Guroo Farms in the Terai Belt of Uttarakhand and Uttar Pradesh, India. Besides the afore-mentioned Iron Bamboos, we also have planted Nutaans and Balcooa, both being loosely clumped, thick walled and with straight growing habits.

Further, I would like to thank our Prime Minister, Mr. Modi to have taken the initiative of having Bamboo de-listed as a forest-produce, thereby facilitating ease of trade, and thus giving an impetus to bamboo agro forestry systems. We, as a Sovereign Nation have been sleeping over the error of classification which has resulted in bamboo not having been exploited to its optimum potential. Thus, China is way ahead of us, despite the fact that we, as a country, have a considerable bamboo stand in our forests, and also have agro-climatic zones that support bamboo agro-forestry systems. Botanically, bamboo is a grass and not a tree- an anomaly that should have been sorted out, way back.

I am trying to locate a reliable source of Guadua Bamboo, which is said to be an excellent species for Terai. It is one of the toughest TIMBER BAMBOO, ideal for construction.

My aim is to get about 10 to 15 acres under bamboo cultivation over the next 2 to 3 years.

Another issue that plagues my mind is the choice of the under-story crop for the first 2 years, till the bamboo stand establishes fully.

Does Turmeric fit the bill??

 

References

http://www.downtoearth.org.in/news/india-opposes-cites-move-to-regulate-trade-in-all-species-of-dalbergia-56884

https://en.wikipedia.org/wiki/Dalbergia_sissoo

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Bamboo Trails- Dendrocalamus Stocksii

I learnt about this near solid, iron-bamboo (Dendrocalamus Stocksii) from an article published by Institute of Wood Science and Technology. The interesting feature was its loose-clumping growth habit, along with a near absence of inter-nodal cavity, thereby making it a suitable candidate for consideration of use to replace wood in certain applications in the handicraft industry. Also alluded to, as an iron-bamboo due to its iron like strength, this species is practically non-existent in N. India. Scientists at FRI and various agricultural institutes need to study the viability of introducing Dendrocalamus Stocksii in the TARAI, which is pretty humid and moist, much like the costal area, where this bamboo is naturally found.

Classification

Dendrocalamus stocksii (Munro), synonym Oxytenanthera stocksii / Pseudoxytenanthera stocksiiaabsence (Munro), synonym Oxytenanthera stocksii / Pseudoxytenanthera stocksii

As per the alluded article, Dendrocalamus stocksii is naturally distributed in Central Western Ghats. Locally called - Chivari’, Mes, Konda, Oor-shema, Marihal, Manga etc. D. stocksii has medium sized, stout solid and strong culms. Though the natural distribution of this species is in humid tropics, this species has a wide adaptability and comes up well in tropical humid, sub humid and semi-arid conditions.

MORPHOLOGY

Culms are said to be about 8 to 9m, basal dia 25-58mm and internode of 15-30cm, light green in colour, loosely spaced and without thorns. They are solid at the base upto about half the culm height.

Anatomical and Mechanical Properties of Dendrocalamus stocksii

Specific gravity- 0.691

Fibre Diameter (μm)- 16.6

Fibre Lumen Diameter (μm)- 5.7

Fibre length (mm)-3.4

Fibre Wall Thickness (μm)- 10.9

Modulus of Rupture (MOR) (kg/cm2)- 620

Maximum crushing stress (kg/cm2)- 386

Vascular bundles per cm2- 281

(Source: Rao et al., 2004)

Species Specific gravity MOR (kg/cm2) Max. crushing stress (kg/cm2)
Dendrocalamus stocksii 0.691 620 386
Bambusa nutans 0.603 529 456
Bambusa bambos 0.584 836 572
Dendrocalamus strictus 0.631 734 359
Tectona grandis 0.604 959 532
comparison
kN/cm²   spruce   bamboo   steel St37
elastic modulus   1100   2000   21000
compressive compressive   4.3   6.2-9.3   14
tension strength   8.9   14.8-38.4   16
bending strength   6.8   7.6-27.6   14
shearing strength   0.7   2.0   9.2

Source- http://bambus.rwth-aachen.de/eng/reports/mechanical_properties/referat2.html

The compressive strength of bamboo is roughly situated between 40 and 80 N/mm2 which is twice to four times the value of most timber species. Bamboo with low moisture content has a higher compressive strength than one with higher moisture.

The shear strength of bamboo is often twice the value of popular timber species.

The bending strength of most bamboo species varies between 50 and 150 N/mm2 and is on average twice as strong as most conventional structural timbers

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