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Abstract SUMMARY Pirst study : Fodder Beet Silage as Effected by Different Cultivars and Potassium Bisulfate Treatment Fourteen cultivars of fodder beet were ensiled for a varital comparative study. These cultivars were grown in two locations (Sids~ and Nubaria). The fourteen cultivars are listed as follows : 1) Rota 2) Poly aurea 3) Hamara 4) Solamka 5) Peramono 6) Solano 7) SOlar 8) Polyqrominqia 9) Maioral 10) MonovBrt 11) Briqader 12) Honored 13) Xyr08 and 14) Remilenger evs. Sowing was done on the first week of November, 1984 and the harvestig was conducted during the first week of JUly, 1985. Oo~l.tly rand.omy••d ~lock de,iqn for the various culelv_r_ in 4 replications was used. Pre-ensilage preparation and conditioning using potassium bisulfate-wilting treatment were done as well as water-silting, and freshly ensiled beet for comparison. Combined analysis was done for the two locations. * Results could be summarized as follows : 1. In summary, the advantages of chemically-wilted compared with water-wilted treatments in respect of the natural characteristics - (colour, ador, foam, and texture) of the produced silage could be due to antioxidant effect of potassium bisulfate during wilting and: ensiling as well. 2. Respiratory-fermentation loss was affected by the applied preensiling treatments and the cultivars. 3. Overall of the tested beet-cultivars, respiratory-fermentation loss of the silage was significantly higher for Nubaria than Sids. 4. The interaction effectaf the location and cultivars was significant for this loss. In other wards the respiratory-fermentation loss was significantly higher in Nubaria than Sids for same cultivars. Whereas, an Opposite trend was noticed in 8ome, other Qultivar •• 51. Effluent loss was higher for the rreshly ensiled treatment by 79’ ; than the water .w•i.lted •.t.reatment. And, the effluent loss for the water-wilted treatment was higher by 83\ than the chemically-wilted pre-ensiling treatment. effluent loss overall of the tested cultivars, where slightly higher loss was obtained in Nubaria as compared with Sids. 7~ There was no significant difference in the net silage weight of water-wilted and the cheaically-wilted beet slices over the tested cultivars. However, freshly ensiled beet showed a significant reduction in the net silage weight compared with either water-wilted or chemically-wilted beet slices as a pre-ensiling treatment. 8. Results showed that the ensiled beet cultivars had a significant effect on the net silage weight of the obtained silage. Net silage weight was slightly but significantly higher in Sids than in Nubaria. 9. The interaction effect of the cultivars and location on the net silage weight was significant. 10. Respiratory-fermentation loss of the silage was positively correlated with effluent loss with (r= 0.186), and negatively correlated with net silage weight (r; 0.974). However, effluent loss was inversely corelated with the net silage weight (r= 0.401). ~1. Silage of the chemically-wilted treatment had a significant lower pH value than either water-wilted or the freshly packed b••t silage. However, there was no significant difference in pH of the two later treatments. 12. Results showed significant differences in the pH values of the chemically-wilted beet silage of the different cultivars. 13. Freshly ensiled silage had the lowest dry matter percentage and the silage of the chemically-wilted treated silage had the highest dry matter percentage. 4. ’lbe obtained variatiOD in dry matter percentage amcmg the silage of different beet-cultivarswasextremely and significantly different. 5. Results showed a significant dry matter superiority of silage in Sids location for some of the tested cultivars. Whereas, opposite significant results were recorded for other cultivars. 16. Overall of the tested beet-cultivars, pre-ensiling treatment of chemically-wilted beet slices produced the highest total sugars percentage cOlDJ?aredwith the water-wilted or the freshly ensiled beet. 17. Chemically-wilted silage had a significantly higher total sugars percentage in Sids than in Nubaria. 18. Dry matter percentage of the silage was positively correlated with the total sugars with correlations coefficient of (r= 0.562). 19. Pre-ensiling treatment of chemically-wilting produced silage that had significantly higher crude fiber, crude protein and fat percentage oompared with the water-wilted s11age. These results were over the whole tested cultivars. 20. It 1$ well noticed that the variation in the obtained silage for the different beet cultivars was almost double for crude protein and crude fiber with no much changes in fat percentage. Bftects ot the tnteraetions between eultivars, locations, and pre-ensiling. treatments on the above contents were studied. 2•• Correlation coefficients between the above characteristics were recorded. 2~. Acetic acid, Lactic acid Valiric acid and Butyric acid percentages were determined in the produced silage. Higher lactic and valiric acid and lower butyric acid percentage were recorded for the chemically-wilted silage compared with the water-wilted silage. 2~. Proper linear regression equations for estimating some quality parameter’s values were generated. |