Determination of mixture ratios and fertilizer doses in some important annual legume and grass species

This research was conducted to determine the optimum nitrogen and phosphorus doses with the implementation of different doses of diammonium phosphate (DAP-18-46) fertilizer on mixtures of cool season annual forage legumes and forage grasses; Hungarian vetch (Vicia pannonicaCrantz.), forage pea (Pisum arvense Lam.), oat (Avena sativa L.) and Italian ryegrass (Lolium multiflorum L.) which can be used in crop rotation. Edirne conditions in Trakya Agricultural Research Institute Field, between 2012-2013, 2013-2014, 2014-2015 growing seasons at randomized block design with three replications. According to the results of the study; the plant height in legumes 30,80 – 96,80 cm, the leaf/stem ratio in legumes 1,70 – 2,04, total fresh forage yield 752,19 – 5.888,42 kg/da, hay yield 151,24 – 1.543,78 kg/da , crude protein ratio 10,84 – 22,62%, crude protein yield 30,63 – 208,51 kg/da, ADF 22,93% - 40,56%, NDF 31,33 – 58,88%, relative feed value 92,23 – 210,73%, nitrogen ratio 1,00-3,15%, phosphorus ratio 0,18-0,37%, potassium ratio 1,98-3,74%, calcium ratio 0,24-1,10%, magnesium ratio 0,10-0,29%, iron content 66,41-772,89 ppm, copper content 4,71-12,14 ppm, zinc content 11,10 – 48,70 ppm, manganese content 41,83-115,33 ppm were determined respectively. The highest fresh and dry forage yield were determined in %67 forage pea - %33 oat and %33 forage pea - %67 oat mixtures. Since forage legumes stand out in terms of roughage quality and forage grasses in terms of yield, it was determined that mixtures should be preferred in order to obtain high yield and quality. In the statistical analysis, a difference was found between the doses given without fertilizer and fertilizer, but there was no statistical difference between 8,7 DAP kg/da and 17,4 DAP kg/da fertilizer doses.