Evaluation of different detoxification procedures on nutritional and energy value of castor bean cake for pigs

ABSTRACT The aim of this study was to evaluate the nutritional and energy value of castor bean cake detoxified by different methods for growing pigs. A total of 24 barrows was distributed in six treatments, being in a reference diet and 5 test diets (75% of the reference diet and 25% of castor beam cake) containing castor bean cake detoxified by the method of calcium hydroxide, autoclaving, calcium hydroxide + silage, autoclaving + silage and extrusion. Castor bean cake subjected to detoxification processes with calcium hydroxide and autoclaving resulted in higher content of digestible protein. For the metabolizable energy value, the process of detoxification with calcium hydroxide, autoclaving, calcium hydroxide+silage, and extrusion did not differ. Considering the nutritional and energy valuation of castor bean cake detoxified by different procedures, the methods using calcium hydroxide and autoclaving were the most efficient.

摘要 本研究旨在评估经不同脱毒方法处理的蓖麻籽饼对生长猪的营养价值与能值。试验共选用24头阉公猪，分为6个处理组，包括1个基础日粮组与5个试验日粮组（试验日粮由75%基础日粮与25%脱毒蓖麻籽饼组成），所用脱毒蓖麻籽饼分别采用氢氧化钙法、高压蒸煮法、氢氧化钙+青贮法、高压蒸煮+青贮法以及挤压膨化法处理。经氢氧化钙与高压蒸煮法脱毒的蓖麻籽饼可消化蛋白含量更高。在代谢能值方面，氢氧化钙法、高压蒸煮法、氢氧化钙+青贮法与挤压膨化法的脱毒处理结果无显著差异。综合不同脱毒方法处理的蓖麻籽饼的营养与能值评定结果，氢氧化钙法与高压蒸煮法的脱毒效果最为优异。