Even without seeing the culm sheaths it is clear that this is the green form of Bambusa vulgaris, now a pantropical species, very common in SE Asia. The narrow leaves, slight zigzag of the stout culms and colour reveals the identity. It is generally quite rare along the Himalayan foothills and adjacent plains, but it is surprisingly common in your particular area of Bodoland and the adjacent Tsirang district of Bhutan.
The orange colour of the culm internodes develops with age, and is not always seen in managed clumps around villages in rural areas, because the culms are usually cut for use before they get old. It is seen more in clumps cultivated for ornamental purposes, but the yellow striped culms are more usually planted in gardens instead. There are some photos of this colouration on culms of Bambusa vulgaris on the internet, see www.bambooaustralia.com.au/wp-content/uploads/2013/05/Bambusa-vulgaris-Common-bamboo.jpg and www.jardins-interieurs.com/v3/popup_especes.php?id_espece=43