Morphological Characters, Yield, and Chemical Composition Potentials of Desho Grass (Pennisetum glaucifolium H.) Intercropped with Vetch Species in the Highlands of Ethiopia

This experiment was conducted with the objective of evaluating the effects of intercropping vetch species and harvesting age on the morphological characteristics, forage yield, and chemical composition of sole and intercropped forages. The experiment was laid out using a randomized complete block design (RCBD) in a factorial arrangement consisting of two factors ((five forage varieties (four vetches & one desho) ∗two harvesting ages)) for a total of ten treatments with three replications. The experimental treatments were sole desho (Var-Kulumsa), desho+V. villosa (Var-Lalisa), desho+V. villosa (Var-Gebisa), desho+V. sativa, and desho+V. dasycarpa (Var-Lana) at 90 and 120 harvesting days. All morphological characteristics forage yield and chemical composition data were collected from two middle rows by excluding the border rows. The result showed that the interaction (P<0.001) effect of harvesting age and intercropping of vetch species and varieties with desho grass was observed on the morphological characteristics, dry matter yield, and chemical composition of intercropped forage. Intercropping of vetch species/varieties with desho grass had shown significantly (P<0.001) higher dry matter yield than sole desho except desho with V. sativa. The highest crude protein (CP) content was obtained from desho grass intercropped with two V. villosa (Var-Lalisa and Var-Gebisa) at 90 days of harvesting age. This CP content of intercropped desho+Vetch species/varieties was double in amount than the CP obtained from sole desho in these species at 90 days of harvesting age. Moreover, the highest CPY was recorded from two V. villosa varieties (Var-Lalisa and Var-Gebisa). Hence, for the intercropping of vetch with desho grasses, the two V. villosa varieties (Var-Lalisa and Var-Gebisa) are recommended for on-farm evaluation and demonstration in the study area and similar agro-ecologies during the establishment phase at 90 days of harvesting age. It is possible to conclude that the intercropping of desho with these selected vetch species could be better than sole desho grass in terms of forage yield and quality in the highlands of northwestern Ethiopia to maximize ruminant livestock production. Hence, for the intercropping of vetch with desho grasses, the two V. villosa varieties (Var-Lalisa and Var-Gebisa) are recommended for on-farm evaluation and demonstration in the study area and similar agro-ecologies during the establishment phase at 90 days of harvesting age.