Skip to main content

Giant bamboo (Dendrocalamus asper)

Petung or betung or dragon bamboo or giant bamboo (Dendrocalamus asper) is a plant species in Poaceae, has a large and strong, has a high adaptability, is used for building materials and structural wood for construction and shoots are cooked for vegetables.

D. asper grows in clumps, purplish black buds, covered by blackish brown velvet. Height of 20 m with curved ends, section length of 40-50 cm, diameter 12-20 cm and thickness of 1-4 cm. The color green or dark green or purplish green or whitish green or laced with white spots.

Dlium Giant bamboo (Dendrocalamus asper)

The boundaries of the segment are surrounded by hanging roots, 50x25 cm reed midribs, covered by blackish brown velvet, rounded ears and sometimes curled up to the base of the reed fronds, 7 mm high with velvety blades up to 5 mm. Irregular jagged ligula, height 7-10 mm with short velvets up to 3 mm.

The leaf fronds are triangular with the base narrowed and hugged upside down. Leaves on a branch with a hollow or pale stem, without ears, ligula 2 mm, strands 15-45x1-8.5 cm, the lower side is slightly veiled and short leaf stalks.

Flowers in panicles on non-leafy branches with spikelet clusters on each segment. Ellipsoid shaped spikelet, 6-9x4-5 mm, flat to the side, has 1-2 gluma and 4-5 florets.

Giant bamboo grows best at an altitude of 400-500 m, rainfall an average of 2,400 mm/year, temperature of 25F, likes a lot of sunlight on alluvial, moist and fertile soils, but they are also able to grow to a height of 1,910 m and dry places in the highlands and lowlands.

Petung grows by spreading roots and rhizomes underground. The speed of spread is determined by the type of soil and local climate. Rizoma in the soil can be cut, but rhizomes separated from the main family will usually die.



The stem is very thick, strong and durable where the water content of 8% has a wood density of 0.7-0.8 g/cm3, the moisture content of 15% has a fracture firmness of 103 N/mm2, compressive firmness parallel to the direction of the fiber is 31 N/mm2 and firmness the shear is 7.3 N/mm2.

Betung bamboo is used as building material and structural wood for the construction of various buildings including house poles, boats, tobacco warehouse frames, bridges, waterways, musical instruments, furniture, household appliances and crafts, laminate boards, pulp, chopsticks, toothpicks and etc.

Big and sweet shoots are popular for pickles and various dishes. The quality of these shoots is considered the best compared to other bamboo species as food ingredients, including if canned.

Kingdom: Plantae
Clade: Angiosperms
Clade: Monocots
Clade: Commelinids
Order: Poales
Family: Poaceae
Genus: Dendrocalamus
Species: D. asper

Comments

Popular

Salak (Salacca zalacca)

Salak or snake fruit (Salacca zalacca) is a species of palm plant in Arecaceae, dioesis, shrubs and not trunked, has many thorns, many shoots, grows into dense and strong clumps, spreads below or above the ground, often branching and 10-15 cm diameter.

S. zalacca has compound leaves, pinnate and 3-7 m long. Petiole, midrib and sapling have many long thorns, thin spines and a blackish-gray color. Minor leaves have a lanceolate shape, a pointed tip, 8x85 cm and a white underside by a waxy coating.


The flowers in the cob are compound, appear in the armpit of the leaf, stem, initially covered by a sheath then dry and break down like fibers. Male flowers 50-100 cm long, 4-12 cylindrical items, 7-15 cm long, reddish in the armpits of tightly arranged scales. Female flowers 20-30 cm long, stemmed long and 1-3 items.

The fruit has scaly skin, is eaten and is known as a table fruit, triangular shaped rather rounded or inverted ovoid, pointed at the base and rounded at the tip, 2.5-10 cm long, w…

God is tools

God and spirit are controversial discussions in science and even mythology will have no place among naturalists and for Darwinians. Apparently this has been final that mythology is a delusional, mystical and superstitious concept that cannot be empirically proven in the world of science.

Most scientists and science activists have agreed that god is nonsense, delusional and cannot be accommodated in the theory of evolution. This opinion can be understood methodologically and I agree with the sentences. But so many behaviors are very real and occur in the field.


I am a fieldman who goes to the wild every day, along rice fields and forests to watch insects to plants, talk to people especially in villages, visit Hindu-Buddhist temples built in the 8th century, witnessing busyness in mosques, temples and churches.

I feel something is missing in the view of naturalists and Darwinians. There are short moments that are missed in analyzes in the timeline of human evolution. These little moment…

Coffee (Coffea arabica)

Kopi gunung or mountain coffee or arabica coffee (Coffea arabica) is a plant species in Rubacea, up to 9 meters high, growing at an altitude above 700 meters above sea level, one of the most economically valuable plantation commodities among other plants.

C. arabica generally blooms after 2 years of age. Adult flowers pollinate with the opening of the petals and crown that will develop into fruit. Green skin will turn yellow and dark red with maturation. The entire process to harvest takes 6-8 months.


Flowers bloom at the beginning of the dry season and the fruit is ready to be picked at the end of the dry season. Primary branches will elongate and form new leaves at the beginning of the rainy season and prepare to produce flowers at the beginning of the upcoming dry season. The main stem has segments where a pair of opposite leaves grow.

Leaves have a line in the middle and lines to the side following the bone, wavy, thick green, muscular and tapered at the tip. The leaves grow and ar…

Chayote (Sechium edule)

Labu siam or jipang or mirliton squash or chayote (Sechium edule) is a plant species in Cucurbitaceae, growing vines and generally upwards, widely planted as food and a source of vitamin C where fresh fruit for salads or lightly cooked to remove sap.

S. edule grows on the ground or climbs large trees up to 12 m high, stems are green, not woody and are usually cultivated anywhere as long as they have support. The ends of the stems are threaded to reach support or link themselves.


The leaves are oval, 10-25 cm wide, have many angles as the bones depend on variety and the surface has hair. Male flowers in groups and solitary female flowers, yellowish green, four or five petals and pistils in the middle.

The fruit hangs on the stem, is irregular in egg shape, slightly flattened and has rough wrinkles, 10-20 cm long, green or yellow, has a thin skin, white insides with a single hole, large and flat. Some varieties have thorny skin.

The fruit is boiled briefly to remove sap and eaten for a v…

Crab-eating macaque (Macaca fascicularis)

Crab-eating macaque or long-tailed macaque (Macaca fascicularis) is a primate species in Cercopithecidae, brown with a lighter color abdomen and whitish hair on the face, polygamy, genome size 2946.84 Mb, 21 pairs of chromosomes, highly adaptive and wild animals that are able to follow human civilization.

M. fascicularis has at least 10 recorded subspecies: Dark-crowned long-tailed macaque (Macaca fascicularis ssp. atriceps), Burmese long-talied macaque (Macaca fascicularis ssp. aureus), Con Song long-tailed macaque (Macaca fascicularis ssp. condorensisis).



Common long-tailed macaque (Macaca fascicularis ssp. fascicularis), Simeulue long-tailed macaque (Macaca fascicularis ssp. fuscus), Kemujan long-tailed macaque (Macaca fascicularis ssp. karimondjawae), Lasia long-tailed macaque (Macaca fascicularis ssp. lasiae)

Philippine long-tailed macaque (Macaca fascicularis ssp. philippensis), Maratua long-tailed macaque (Macaca fascicularis ssp. tua), Nicobar crabeating macaque (Macaca fascic…