1. CHEMICAL COMPOSITION AND IN VITRO FERMENTATION OF SILAGES FROM DIFFERENT SORGHUM HYBRIDS CULTIVATED IN THREE PILOT FARMS
- Author
-
Mirko Cattani, Laura Maccarana, Alberto Sartori, Renzo Converso, and Lucia Bailoni
- Subjects
Sorghum hybrids ,Sorghum silage ,in vitro degradability ,in vitro gas production ,dairy cows ,Agriculture (General) ,S1-972 ,Plant culture ,SB1-1110 - Abstract
This experiment compared silages obtained from ten hybrids of sorghum grown in three farms of the Po Valley, in terms of in vitro degradability, gas production (GP), and energy value. Hybrids were sown on 30 experimental plots (three plots per each hybrid), harvested at late-milk stage of maturity and ensiled for 60 d into 30 mini-silos (3 silos×10 hybrids). After ensiling, silages were analyzed for proximate composition, pH, ammonia N, and fermentation acid profile. Degradability of NDF (NDFd) and of true dry matter (TDMd) was determined after 48 h of incubation using sequentially DaisyII incubator and Ankom220 Fibre Analyzer. Two incubation runs (at 48 h) were carried out to evaluate in vitro GP of silages, and to estimate their energy content. All data were submitted to ANOVA considering “hybrid” and “farm” as sources of variation. The interaction between hybrid and farm was never significant and it was excluded from the statistical model. The contents of dry matter and NDF of silages were influenced by hybrid and farm (P
- Published
- 2015
- Full Text
- View/download PDF