Determination of ruminal dry matter and crude protein degradability and degradation kinetics of several concentrate feed ingredients in cashmere goat

Abstract

The objective of this study was to determine the dry matter (DM) and crude protein (CP) degradation parameters of several commercially available concentrate feed ingredients used in Shaanbei White Cashmere Goat (SWCG). Three 4-year-old female SWCGs fitted with permanent rumen fistula were fed with corn straw and concentrate feed. Tested energy and protein feed ingredients were corn, wheat bran (WB), corn germ meal, soybean meal (SBM), rape seed meal (RSM), and distillers dried grains. The feed samples were placed in a nylon bag and incubated in the rumen for 0, 2, 6, 12, 24, 36, and 48 h to measure the ruminal disappearance of DM and CP. The exponential model was used to calculate the degradation kinetics. There were significant differences between sources in terms of DM and CP disappearance and degradability. In terms of energy feed ingredients, the potential degradability of DM and CP of corn was significantly higher than those of the other energy feed ingredients, whereas the effective degradability (ED) of CP of WB at three outflow rates was significantly higher than those of the others. In protein feed ingredients, SBM had the highest potential degradability of DM and CP. Furthermore, the ED of DM of SBM at three outflow rates was significantly higher than those of the other protein feed ingredients, whereas the ED of CP of RSM at three outflow rates was significantly higher than those of others. Those feed ingredients with low degradability can increase the bypass nutrients, which will be digested in the small intestine. The degradation parameters obtained in this experiment using SWCG would be useful in improving the accuracy of formulation of cashmere goat diet in Northwest of China. ARTICLE HISTORY

Effects of Astragalus Membranaceus supplementation on oxidative stability of Cashmere goat

“…Inner Mongolia Cashmere goats are excellent variety, which can offer cashmere and meat. Now, the research on Cashmere goat is mainly focused on cashmere performance, rumen metabolism, and nutritional metabolism (Ansari‐Renani et al., 2011; Bai et al., 2017; Lei et al., 2017). However, the antioxidant properties of cashmere goats are rarely studied.…”

“…nutritional metabolism (Ansari-Renani et al, 2011;Bai et al, 2017;Lei et al, 2017). However, the antioxidant properties of cashmere goats are rarely studied.…”

Effects of rations containing formaldehyde-protected soybean meal on meat production in Kacang goats

“…The dry matter digestibility of a rice straw diet supplemented with SBM for goats was 59.5% [4]. In addition, the degradability of SBM, using an in situ technique, in Cashmere goats after incubation for 12 and 24 h was approximately 64.75 and 80.57% of the dry matter, respectively [5].…”

In Vitro Digestion Products of Ration Contain Different Levels of Faba Beans Treated With Formaldehyde Using Arabi Sheep Rumen Liquid

“…As described in a preceding study (Musco et al, 2017), the carbohydrate fractions affect the kinetics of fermentation differently: starch promotes a more intense and rapid process, while structural carbohydrates trigger a slower and less stable fermentation. Lei et al (2018) reported that the dry matter degradability of feed ingredients in rumen increased with increasing incubation time, the degradation of energy feed ingredients was on an uptrend prior to 24 h incubation and then the process slowed down, while protein feed ingredients were at 36 h, which was on an uptrend all the time. This suggested that feed ingredients for energy feed ingredients were almost entirely digested at 24 h and 36 h for protein feed ingredients, respectively.…”