كليدواژه :
cultivars , alfalfa , يونجه , چين , Cut , عملكرد كمي و كيفي , Quantitative and Qualitative , كشاورزي
چكيده لاتين :
Alfalfa is a high quality forage crop which can produce more than two tons of protein per hectar. Quantitative and qualitative forage yield of seven alfalfa cultivars were determined in an experiment in 1996-97 in karaj. The design was split plot arranged in complete randomized block with replications. In each cut, total dry matter production and protein, fiber, P and Ca countinents of forage were determined. Analysis based on split plot design over time showed that the effect of cutting and interaction of cutting X cultivator for leaf stem ratio, protein and fiber yield were sianificant. The protein yield as well as fresh and dry forage yield in pioneer 581 cultivar, Ca, P, and leaf stem ratio in Yazdi and fiber yield in pearce were higher than other cultivars. Also protien, fiber and forage continents on first harvest, P in second harvest, Ca and leaf stem ratio in third harvest were higher than other harvests due to coincidence of cutting with longer days better ecological conditions. The results of the experiment showed that: enviromental conditions at hrvest time have an important role on quantity and quality of produced forage. Concerning forage, protein and fiber yield, Pioneer 581, Pearce, Hamadami, Gharayonjeh and Bami were most suitable cultivars for Karaj region, respectively.
