برري اثر برداشت علوفه بر عملكرد دانه غلات در كشت دو منظوره

To investingate the effects of forage clipping on forage and grain yield of cereals an experiment was conducted in Kabootar Abad Research Station of Isfahan in three growing season (1990-1993). The experimental design was a split plot in a Randomized Complete Block Design with four replications. Five cereal cultivars assigned to the main plots included: Two wheat cultivars (Roshan and Ghods), two barley cultivars (Valfajr and Reihan) and one triticale variety. The sub plots were assigned to two treatments: forage clipping and non-clipping. The results showed the highest dry forage and forage protein yield (4433 and 926 kg/ha respectively) belonged to triticale and the Ghods had the lowest dry forage and forage protein yield (2975 and 708 kg/ha respectively). Roshan and two barley cultivars showed no significant difference in dry forage and forage protein yield. Triticale produced the highest grain yield (9060 kg/ha) and the barley cultivars produced the lowest seed yield. The seed yield of Ghods (8550 kg/ha) was significantly greater than Roshan (7559 kg/ha). Forage clipping decreased the seed yield and biological yield, and increased harvest index.