Chemical composition of ostrich hatchery by-products
2000
Anucha Saengsophon | Wichai Supalucksana | Nahatai Vijitrotai
Chemical composition of ostrich hatchery by-products includes unfertilized eggs, dead embryos, dead chicks and egg shells was estimated after processing with a dry cooking method at 100 deg C for 1 hour and a pressure cooking method at 15 psi for about 45 minutes. Results indicated that the processing method did not universally alter the chemical composition of analysed samples. The chemical composition varied according to the kind of sample, except for moisture content and nitrogen free extract. The dry cooking method left a higher percentage of moisture within the sample of unfertilized eggs meal, dead chicks meal and egg shells meal than the pressure cooking (P0.01). The dry cooking method left a lower percentage of nitrogen free extract within all analysed samples than the pressure cooking (P0.05). The dry cooking method produced a higher percentage of crude protein within the sample of unfertilized eggs meal than the pressure cooking (P0.01), but it left a lower percentage of ether extract and gross energy than the pressure cooking (P0.01). The dry cooking method produced a higher percentage of crude protein and gross energy within the sample of dead embryos meal than the pressure cooking (P0.05 and P0.01). However, the dry cooking method left a lower percentage of crude protein and ether extract (P0.05) includes gross energy (P0.01) within the sample of dead chicks meal than the pressure cooking. The unfertilized eggs meal, dead embryos meal and dead chicks meal were high nutritive by-products in crude protein and gross energy for animal feedstuff. The average of crude protein was 21.97 percent, 22.85 percent and 45.79 percent respectively and the gross energy average of 5.84, 6.15 k.cal/g., respectively. The largest composition of an egg shells meal was 87.22 percent ash with 41.34 percent calcium.
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