Rr. Santana et al., INTRODUCTION OF DIGITARIA AND CYNODON ON THE SEMIARID SOUTHERN COAST OF PUERTO-RICO, The Journal of agriculture of the University of Puerto Rico, 78(3-4), 1994, pp. 137-145
Nine forage grass introductions (eight Digitaria and one Cynodon) were
evaluated at 49-day harvest intervals under irrigation in the semiari
d southern region of Puerto Rico. C. dactylon USDAPI 255455 (Coast Cro
ss No. 1) produced the highest dry matter yield (DMY) throughout the s
even cuts of each of the 2 years. However, no significant differences
were observed between C. dactylon USDAPI 255455 and D. milanjiana 6416
and 6415 during each of the years in which the grasses were evaluated
. In terms of the combined DMY of both years, C. dactylon 255455 was s
ignificantly superior to the rest of the introductions with the except
ion of D. milanjiana PRPI 6416. The in vitro organic matter digestibil
ity (IVOMD) of C. dactylon 255455 was significantly less than that of
both D. milanjiana 6416 and 6415. On the other hand, D. milanjiana pre
sented the highest IVOMD on the cuts of the long and short day season.
The crude protein (CP) content was very similar in most of the introd
uctions under evaluation; however, D. milanjiana PRPI 6416 was the low
est in CP content during the short day season cut.