THE EFFECTS OF WILTING AND DIFFERENT ADDITIVES ON SILAGE FERMENTATION AND AEROBIC STABILITY OF FORAGE TURNIP SILAGE (Brassica rapa L.)
Project no. 20182 · Status: Kapanmış · 2019
Summary
This study was carried out to determine the effects of wilting and different additives (wheat straw, wheat bran and dried sugar beet pulp) on silage fermentation and aerobic stability of forage turnip (Brassica rapa L.) variety Lenox. In the study, 5 different experimental groups have been formed by ensiling of forage turnip (FT) unwilted or without additives (Control), wilted (Wilting), with straw (FT+Straw), wheat bran (FT+Bran) and dried sugar beet pulp (FT+ Dried Sugar Beet Pulp) respectively. In this trial, all additives were supplemented to fresh material at 120 g/kg level to obtain a silage mixture with 30±0.5% DM. Silage materials were compressed into 1 L glass jars with 5 replicate and allowed to be fermented for 60 days. At the end of the ensiling period, all silages were subjected to an aerobic stability test for 7 days. Wilting and different additives significantly (P<0.05) increased DM content of the silages but did not affect pH value of silages (P>0.05). Wilting forage turnip prior to ensiling decreased ammonia-N (NH3-N) content and yeast count, and increased in water soluble carbohydrates (SÇK) content, Lactobacillus count, aerobic stability of silages. The straw supplementation decreased crude protein (CP), WSC, relative feed value (RFV) and metabolisable energy (ME) value (MECN and MENDF), and increased acetic acid, neutral detergent fiber (NDF), hemicellulose and cellulose of silages. An increase in CP content, Lactobacilli count, aerobic stability, RFV, MECN value, and decrease in crude ash (CA), NH3-N, acid detergent fiber contents and yeast count of silages supplemented wheat bran were determined. The highest WSC content, dry matter intake (DMI), RFV, ME (MENDF, MEADL) values, and the lowest NDF, ADF, acid detergent lignin (ADL) and hemicellulose obtained from silages supplemented with dried sugar beet pulp. Although wilting, straw and bran supplementation increased aerobic stability, dried sugar beet pulp supplementation decreased aerobic stability in silages. As a result of research, wilting, wheat bran and dried sugar beet supplementation improved fermentation characteristics and feed value, increased aerobic stability (except for dried sugar beet) of forage turnip variety ‘Lenox’ silages.