Investigation of the effects of different sowing times of different varieties on second crop maize silage yield and quality

This research was carried out in the Research and Application field of GAP International Agricultural Research and Training Center in four replications according to the random blocks design under second crop growing conditions in 2014-2015. Western Mediterranean Agricultural Research Institute variety 'Burak', Pioneer Seed Company variety '31Y43', Sakarya Maize Research Institute variety 'Ada 523', Black Sea Agricultural Research Institute variety 'Samada-07' and Monsanto Seed Company variety 'DKC 7211' was used as research material. Sowing times (15 june, 30 june ve 15 july) was main parcels and varieties (Burak, Samada-07, DKC 7211,31Y43, Ada 523) was subparcels in the trials. 28 parameters were investigated in the study. While the silage color, silage odour, silage structure, acetic acid ratio, butric acid ratio and propionic acid ratio were found to be statistically insignificant, plant height, leaf ratio, stalk ratio, stem ratio, green grass yield, dry grass yield, silage dry matter rate, silage dry matter yield, silage ADF ratio, silage NDF ratio, digestible dry matter ratio, dry matter consumption, relative feed value, silage flieg score and lactic acid ratio were statistically significant. According to the results of the research; plant height values ranged between 248.8-291.6 cm, plant stem diameter ranged between 20.1-28.4 mm, leaf ratio ranged between 16.0-22.7%, cob ratios ranged between 25.0-30.9%, stem ratio ranged between 46.6-58.4%, green grass yield ranged between 6000.5-10372.8 kg/da, dry grass yield ranged between 1656.9-2556.9 kg/da, the dry matter content of the silage was ranged between 20.3-28.1%, the silage dry matter yield was ranged between 1493.9-2937.8 kg/da, the silage Ph value was ranged between 3.7-3.8, the crude protein ratio in silage was ranged between 7.4-7.9%, the crude protein yield in silage was ranged between 131.2-196.0 kg/da, crude ash content in silage was ranged between 5.7-7.1%, crude ash yield in silage was ranged between 94.3-180.6 kg/da, ADF ratio in silage was ranged between 30.7-36.2%, silage NDF ratio was ranged between 38.3-47.9%, silage flieg score was ranged between 95.6-112.3 points, silage DLG score was ranged between 16.9-18.3 points and the ratio of lactic acid in silage ranged from 8.26-11.34%. According to the results 15th of July planting date of the Burak variety for grass production and 30th of June date of the 31Y43 variety for silage production may be recommended under Diyarbakir conditions.