Abstract
In this study, three different experiments were conducted to evaluate the nutritional value of apple pomace produced in southern areas of the Republic of Korea (South Korea). The effects of combining apple pomace in different ratios with commercial concentrates and rice straw in the diets of Korean native goats (Capra hircus) were examined. In experiment I, in situ DM and CP disappearances from nylon bags incubated in the rumen of goats showed that greater amounts of DM and CP were released from apple pomace than those from concentrates at the later stages of incubation, but only after 48 h for DM and CP, respectively. This was reflected in the higher b value of the slowly degradable fraction of the apple pomace compared to the concentrates. Prior to these times the trend was reversed. In experiment II, Korean native goats were fed a diet containing apple pomace with either rice straw or rice straw and concentrates, and the in vivo nutrient digestibilities compared to animals receiving an alfalfa hay. DM digestibility in the animals given apple pomace plus concentrates with rice straw (66.86%) were similar to the goats given alfalfa hay only (69.09%) but significantly greater than for a diet of rice straw plus concentrates. In experiment III, an in vivo study was conducted to investigate the inclusion of 30 to 60% apple pomace pre-mixed with rice straw, rice bran and concentrates on the nutritional value for Korean native goats. Apple pomace mixed diets had higher DM intakes, nutrient digestibility and nitrogen retention than diets without apple pomace, which may have been due to the higher non-structural carbohydrates (NSC) and less ADF and NDF than those in other treatments. Replacement of concentrates with apple pomace in rice straw based diets of Korean native goats fed either separately (experiment II) or by pre-mixing (experiment III) gave satisfactory feed intake, digestibility, pH of ruminal fluid and production of NH3-N and VFA in the rumen of goats. The results of this study infer that apple pomace can be included at levels of up to 60% in the diets of goats without dramatic effect on the animal. (Asian-Aust. J. Anim. Sci. 2002. Vol 15, No. 11 : 1599-1605)
Highlights
non-structural carbohydrates (NSC) and energy, but low crude protein (Bae et al, 1994).the nutritional value of apple pomace for goatsThere has been a substantial increase in the production has not been studied especially for Korean native goats
A reasonable amount of apple pomace is currently experiment II, four intact Korean native goats of mean produced in southern areas of South Korea
Disappearance from nylon bags incubated in the rumen indicated a large increase in the amounts of dry matter (DM) and crude protein (CP) from apple pomace released at the later stages of incubation (Table 2) and higher overall levels of DM and CP degradation in the rumen from apple pomace
Summary
NSC and energy, but low crude protein (Bae et al, 1994). There has been a substantial increase in the production has not been studied especially for Korean native goats. Goats apple pomace as a supplement for rice straw diets in goats. In in South Korea has a limited production of forage for herbivores and the utilization of greater situ experiment I, two goats with the mean weight of 16+/quantities of agricultural by-products is desirable. Animals were fed ad libitum a mixed be low due to its high fiber content and diet of rice straw (30%), rice bran (30%), apple pomace reduced intake and digestibility in animals (Jackson, 1977). A reasonable amount of apple pomace is currently experiment II, four intact Korean native goats of mean produced in southern areas of South Korea Concentration and molar proportion of the volatile fatty acids were determined in the rumen fluid samples by gas chromatography
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