Starch Digestion in the Horse
نویسندگان
چکیده
The rate and extent of starch digestion is determined by: 1. properties of the starch granule; 2. the effect of processing; 3. associated food structures (plant cell walls); 4. transit time through the small intestine; 5. the availability and concentration of enzymes. These factors will affect the glycemic response of the horse to feeding and the subsequent production of insulin. Resistant starch, together with undigested starch, will pass into the large intestine of the horse where it may be fermented to short chain fatty acids. Resistant starch may escape digestion in the small intestine of the horse because: 1. of physical entrapment within a food, such as in partly-milled grains and seeds (RS 1 starch); 2. starch granules have a B or C crystalline structure which is highly resistant to digestion (RS 2 starch); 3. retrogradation through food processing, mainly in the form of retro-graded amylose (RS 3 starch). RS 3 starch is entirely resistant to digestion by pancreatic amylase in man (Englyst and Macfarlane, 1986) and this starch is commonly found in peas. RS 1 and RS 2 are quantitatively the most important forms of resistant starch found in horse feeds.
منابع مشابه
In : Recent
The horse evolved primarily as a grazing and browsing, hindgut fermenting herbivore, with a range of hydrolyzable and fermentable forage carbohydrates as its main source of energy. Pastures provide the primary habitat and nutrition for most horses, and the remaining stall-confined horses have approximately one-half of their nutrition supplied by conserved pasture, i.e., hay. Pasture composition...
متن کاملVariation in salivary and pancreatic alpha-amylase genes in Italian horse breeds.
The dietary demand of the modern horse relies on high-cereal feeding and limited forage compared with natural grazing conditions, predisposing the horse to several important diseases. Salivary and pancreatic alpha-amylases (coded by AMY1 and AMY2 genes, respectively) play a crucial role in carbohydrate digestion in nonruminants, but little is known about these 2 genes in the horse. Aim of this ...
متن کاملA new kinetic model for biogas production from co-digestion by batch mode
Coming out from the growth kinetics, the Gompertz model has been developed and considered as the best one for simulating the biogas production from anaerobic digestion. However, the model has failed to describe the starting point of the process, and no-sense of lag phase constant has been pointed out. Thus, the goal of this study is to develop a new kinetic model of biogas production with meani...
متن کاملMobile bag starch prececal disappearance and postprandial glycemic response of four forms of barley in horses.
To determine prececal starch digestibili-ty and estimate glucose uptake from the digestion of 4 forms of barley in the small intestine, 4 mature cecally fistulated geldings (449 ± 41 kg BW) fed a 62:38 (wt/wt) meadow hay:concentrate diet at 1.7 kg DM/100 kg BW were included in a 4 × 4 Latin square design experiment. During each period, horses received 80% DM of their concentrate as 1 of the 4 f...
متن کامل