Evaluation of solid biogas fermentation residue as a source of organic fertilizer on berseem clover (Trifolium alexandrinum L.)

Abstract

The study was carried out in order to investigate the effects of 5 different solid biogas fermentation residue doses (0, 5, 10, 15, 20 t ha-1) on the yield and quality of berseem clover (Trifolium alexandrinum L.) in Aydin province. In the study, no chemical fertilizers were applied and the harvest was carried out at 50-100% flowering time. In the study, hay yield (t ha-1), leaf / stem ratio (%), Ca (%), Mg (%), crude ash content (%), acid detergen fiber (ADF,%), neutral detergent fiber (NDF,%), crude protein content (%) parameters are measured. Crude protein yield yield (t ha-1) and relative feed value calculated after the measurements. According to the results, in 2016-2018 years average hay yield was obtained from 5.529 t ha-1 of 15 t ha-1 solid biogas residue application. In terms of crude protein content, the highest value in 2016-2018 years was found as 22,88% in 10 t ha-1 fertilizer application. As a result of the study, it was found that solid biogas waste had positive effects on feed efficiency and quality when all parameters were evaluated. Especially 10 t ha-1 and 15 t ha-1 solid biogas residue fertilizer doses were determined to come to the fore in the berseem clover.