A 3 x 3 factorial study was conducted in the southern foothills of Bhutan to compare 3 cultivars of Napier hybrid grass
(Pennisetum purpureum x P. glaucum: Pakchong-1, CO-3 and Giant Napier), at 3 cutting intervals (40, 60 and 80
days), in terms of forage growth, dry matter (DM) yield and crude protein (CP) concentration. The effects of cultivar x
cutting interval were significant only on tiller number per plant and leaf:stem ratio (LSR). CO-3 consistently produced
the highest tiller number per plant, leaves per plant and LSR, while Pakchong-1 produced the lowest. Pakchong-1
plants were taller, had bigger tillers and basal circumference and higher stem DM production than CO-3 and Giant.
Leaf CP for all cultivars was about 17%, while stem CP concentration was lower for Pakchong-1 than for the other
cultivars (3.6 vs. 5.3%, P