Impact of controlled fermentation and steeping of high moisture corn on its nutritional value for pigs

High moisture corn (HMC) can undergo fermentation during storage that may improve its nutritional value for pigs. Stored HMC used in this study contained (n = 4) 75% dry matter (DM), and, on a DM basis, 63.8% starch, 0.5% mono and disaccharides, 9.9% protein, 19 mM acetic acid, 18 mM lactic acid (LA), 1.25 × 10⁷ cfu g^− 1 of LA producing bacteria, 2.88 g kg^− 1 total phosphorus (P), and 1.26 g kg^− 1 soluble P. The soluble P content was higher than in freshly harvested HMC (0.27 g kg^− 1 DM) and indicates P release during storage. Studies were aimed at altering the nutritional value of stored HMC by controlled fermentation or steeping. Changes in LA content were not affected (P > 0.05) by addition of exogenous Lactobacillus and Bacillus bacteria. Steeping of HMC with phytase (Ronozyme) was examined at four inclusion levels (0, 500, 750, 1000 FTU kg^− 1) and at either 21 °C or 37 °C. At 37 °C added phytase released virtually all phytate P within 6 h irrespective of the level (levels increased by 1.44 g P kg^− 1 DM); at 21 °C, the increase was maximized at 1.2 g P kg^− 1 DM after 24 h. The feeding value of HMC for pigs can be altered by steeping with exogenous phytase and does not appear to require microbial inoculants.     

植酸酶对玉米、豆粕日粮中生长猪代谢的影响

本文通过植酸酶对生长猪的代谢的不同来评估饲喂低植酸玉米、低植酸豆粕、常规玉米、常规豆粕对其的影响。将48头去势的生长猪随机分成8个组,每组6头猪,采用2×2×2的试验设计,猪只日粮均符合日粮标准。结果表明,低植酸玉米组比常规玉米组(2.85:3.24±0.119g/d;P=0.024),低植酸豆粕组比常规豆粕组(2.79:3.30±0.119g/d;P=0.007),植酸酶组比不饲喂植酸酶组(2.80:3.29±0.119g/d;P=0.009),低植酸玉米、豆粕、添加植酸酶组比常规玉米、豆粕和无植酸酶组(2.16:3.70±0.237g/d;P0.001)的粪中的磷都要低。低植酸玉米日粮比常规玉米日粮(48.4:39.9±2.27%;P=0.012),植酸酶日粮比无植酸酶日粮(48.4:39.9±2.27%;P=0.019),低植酸玉米、豆粕、添加植酸酶组比常规玉米、豆粕和无植酸酶组日粮(47.2:41.1±2.27%;P=0.075)的磷的消化率都有所增加,这些说明低植酸玉米、低植酸豆粕或者直接添加植酸酶酶制剂均可以提高磷的利用率并且可以通过粪中磷的降低而改善对环境的污染问题。     

普通玉米、糯玉米和蒸汽压片玉米对生长猪能量和营养物质消化率的影响

研究的目的是通过饲喂生长猪普通玉米、糯玉米和蒸汽压片玉米来测定其消化能、代谢能和营养物质的表观消化率。     

去皮豆粕的价值及其在畜牧生产中的作用

去皮豆粕是指大豆经清理、调质、破裂、去皮、压片，并在特定条件下由有机溶剂正己炕及其同类碳氢化合物脱脂，再经烘烤、粉碎后制成的粉状物。去皮豆粕作为大豆去皮浸出新工艺的产物．其商业化生产始于20世纪90年代初期．我国于20世纪90年代后期开始引进。目前。越来越多的大型制油企业已经建立或准备采用国际先进的去皮浸提工艺．将有越来越多的去皮豆粕进入市场。     

Evaluation of the nutritional value of glycerol for nursery pigs

In Exp. 1, a total of 144 pigs (BW, 6.68 ± 0.17 kg) were weaned at 21 d, blocked by BW, and allocated to 48 pens with 3 pigs per pen. Pens were randomly assigned to 1 of 6 dietary treatments (0, 2.5, 5, 7.5, and 10% glycerol supplemented to replace up to 10% lactose in a basal starter 1 diet containing 20% total lactose, which was fed for 2 wk), and a negative control diet with 10% lactose and 0% glycerol. A common starter diet was fed for the next 2 wk. In Exp. 2, a total of 126 pigs (BW, 6.91 ± 0.18 kg) were weaned at 21 d of age, blocked by BW, and allocated to 42 pens with 3 pigs per pen. Pigs were assigned to 1 of 6 treatments in a 2 × 3 factorial arrangement in a randomized complete block design with factors being 1) glycerol inclusion in replacement of lactose in starter 1 diets (0 or 5%) fed for 2 wk, and 2) glycerol inclusion in starter 2 diets (0, 5, or 10%) fed for 3 wk. In Exp. 1, glycerol supplementation at 10% improved (P=0.01) ADG (266 vs. 191 g/d) and G:F (871 vs. 679 g/kg) during the starter 1 period when compared with the negative control. Incremental amounts of glycerol linearly (P<0.05) increased ADG and ADFI, but did not affect G:F during starter 1. There was no effect of feeding glycerol during the starter 1 phase on subsequent performance during the starter 2 phase or overall. Serum glycerol concentrations increased linearly (P=0.003) with increasing dietary glycerol, and serum creatinine (P=0.004) and bilirubin (P=0.03) concentrations decreased with increasing glycerol. In Exp. 2, glycerol did not affect performance during starter 1, but it linearly increased (P≤0.01) ADG and ADFI during starter 2 (464, 509, and 542 and 726, 822, and 832 g/d, respectively) and overall (368, 396, and 411 and 546, 601, and 609 g/d, respectively). At the end of the study, pigs were 1.0 and 1.5 kg heavier when fed 5 and 10% glycerol, respectively (linear, P<0.01). Serum glycerol concentrations increased linearly during starter 2 (P<0.001), but were not affected during starter 1. Glycerol supplementation increased serum urea N quadratically (P<0.001) and decreased creatinine linearly (P<0.05) in the starter 2 phase. Overall, data indicate that glycerol can be added to nursery pig diets at 10%, while improving growth performance.     

Processing of ingredients and diets and effects on nutritional value for pigs

A conventional diet based on corn and soybean meal fed to pigs is usually provided in a mash form and in most cases, processing other than grinding and mixing is not used. However, due to the high cost of energy in pig diets,use of high fiber ingredients such as soybean hulls, distillers dried grains with solubles, and wheat middlings has increased. High fiber concentrations in the diet usually results in reduced energy and nutrient digestibility due to the low capacity of pigs to digest fiber, which negatively impacts growth performance and carcass composition of the pigs. Feed processing technologies such as changes in grinding procedures, expansion, extrusion, pelleting, use of enzymes or chemical treatments may, however, be used to solubilize some of the cel ulose and hemicel ulose fractions that form the cel wal of plants in the ingredients, and therefore, increase nutrient availability. This may have a positive effect on energy digestibility, and therefore, also on pig growth performance and carcass composition, but effects of different feed technologies on the nutritional value of feed ingredients and diets fed to pigs are not fully understood. It has however, been demonstrated that reduced particle size of cereal grains usually results in increased digestibility of energy, primarily due to increased digestibility of starch. Extrusion or expansion of ingredients or diets may also increase energy digestibility and it appears that the increase is greater in high fiber diets than in diets with lower concentrations of fiber. Chemical treatments have not consistently improved energy or nutrient digestibility, but a number of different enzymes may be used to increase the digestibility of phosphorus, calcium, or energy. Thus, there are several opportunities for using feed technology to improve the nutritional value of diets fed to pigs.     

不同鱼种加工方法的鱼粉对幼猪的营养价值不同

为早期断奶仔猪设计日粮始终是一项带有挑战性的任务。仔猪日粮从母乳转换为干饲料过渡期间,使其饲料采食量达到最高,是饲料调制者所追求但却很难达到的一个目标。日粮的转变使种种养分的来源从母乳变成了碳水化合物、蛋白质和脂肪的复合物。如果消化不好会造成仔猪生长发育不良。 研究人员指出,消化不良的主要原因是仔猪胃内产生的某些糖酶和蛋白酶不足,以及胃内盐酸不足。还可能有其它原因,如小肠的绒毛受到损伤,以及饲料厂的过敏源所引起的细胞免疫反     

The flow of undigested corn residues through the gastrointestinal tract of cattle

Two experiments were conducted to measure effects of source and level of roughage on the flow of corn residues through the gastrointestinal tract of cattle. In Exp. 1, steers (195 kg) were fed diets of ground corn with 0, 30 or 60% of ground Coastal bermudagrass hay (Cynodon dactylon) [L.] Pers.) at intakes of 1, 1.5 or 2% of BW in a 9 x 9 Latin square. Experiment 2 consisted of two 4 x 4 Latin squares with either rice hulls (square 1) or ground Coastal bermudagrass hay (square 2) providing 0, 7.5, 15 or 30% of the total diet fed at 1.5% of BW. After a 28-d adjustment period, a portion of the corn in one meal was replaced with cracked corn stained with brilliant green. The concentrations of stained corn residues appearing in the feces subsequent to dosing were fitted to a one-compartment, age-dependent model and compartmental mean residence time (CMRT) and time delay (tau) were estimated. In Exp. 1, increasing the level of intake of the ration from 1% to 1.5 or 2.0% of BW increased (P less than .05) CMRT by 52% and reduced (P less than .05) tau by 41%. In Exp. 2, source of roughage had no effect (P = .95) on CMRT or tau. Combined results of the two experiments indicated that increasing proportion (P) of either roughage was associated with an exponential decline in CMRT of stained corn residues (CMRT = 1211 * e-.0315P) from rations consumed at 1.5 and 2.0% of BW. No consistent effect of roughage type or proportion was noted on time delay in the two experiments collectively. These results indicate that increasing the proportion of roughage in the diet exponentially reduces residence time of corn residues in the ruminoreticulum (CMRT) without affecting residence time in the postgastric segments (tau).     

The nutritional management of gastrointestinal tract disorders in companion animals

Dietary protein, carbohydrates, fats and fibre have marked influences on gastrointestinal tract function and dysfunction. This article reviews the nutritional management of common gastrointestinal disorders in companion animals and introduces some of the current areas of research including probiotics, prebiotics, protein-hydrolysate diets, immunonutrition and dietary fibre.

Nutritional management of oesophageal disease revolves around varying the consistency of the diet and feeding the animal from an elevated container. Provision of bowel rest remains the mainstay of the management of acute gastroenteritis but food-based oral rehydration solutions are a useful adjunct. The recommended diet for chronic small bowel diarrhoea is a highly digestible, hypoallergenic, gluten-free, low-lactose and low-fat diet with modest amounts of fermentable fibre. The use of probiotics in the management of diarrhoea in companion animals has not yet been shown to be beneficial. It is likely that prebiotics will prove more effective than probiotics in the prevention of enteropathogenic infections.

Approximately 50% of cats in New Zealand that suffer from chronic idiopathic vomiting or diarrhoea will respond to a novel-protein-elimination diet and approximately 30% meet the diagnostic criteria for food sensitivity. Growing evidence supports the use of protein-hydrolysate diets in the management of inflammatory bowel disease and further advances in immunonutrition are expected. The dietary management of colitis should include a hypoallergenic diet with a fermentable fibre source.

Manipulation of the diet provides clinicians a powerful therapeutic strategy to be used alone or concurrently with drug therapy in the management of gastrointestinal disorders.     

The nutritional management of gastrointestinal tract disorders in companion animals

Dietary protein, carbohydrates, fats and fibre have marked influences on gastrointestinal tract function and dysfunction. This article reviews the nutritional management of common gastrointestinal disorders in companion animals and introduces some of the current areas of research including probiotics, prebiotics, protein-hydrolysate diets, immunonutrition and dietary fibre. Nutritional management of oesophageal disease revolves around varying the consistency of the diet and feeding the animal from an elevated container. Provision of bowel rest remains the mainstay of the management of acute gastroenteritis but food-based oral rehydration solutions are a useful adjunct. The recommended diet for chronic small bowel diarrhoea is a highly digestible, hypoallergenic, gluten-free, low-lactose and low-fat diet with modest amounts of fermentable fibre. The use of probiotics in the management of diarrhoea in companion animals has not yet been shown to be beneficial. It is likely that prebiotics will prove more effective than probiotics in the prevention of enteropathogenic infections. Approximately 50% of cats in New Zealand that suffer from chronic idiopathic vomiting or diarrhoea will respond to a novel-protein-elimination diet and approximately 30% meet the diagnostic criteria for food sensitivity. Growing evidence supports the use of protein-hydrolysate diets in the management of inflammatory bowel disease and further advances in immunonutrition are expected. The dietary management of colitis should include a hypoallergenic diet with a fermentable fibre source. Manipulation of the diet provides clinicians a powerful therapeutic strategy to be used alone or concurrently with drug therapy in the management of gastrointestinal disorders.     

陈化玉米在生长猪上的营养价值评定

试验旨在评定饲粮中添加陈化玉米对生长猪的营养价值影响。选择平均体重为(33.00±0.95) kg的健康DLY三元杂交猪40头,按照体重相近的原则,随机分为对照组和陈化玉米组两个组,每组10个重复,每个重复2头猪。对照组饲喂含60%新玉米的饲粮,陈化玉米组用陈化玉米等量替代新玉米。试验分为30 d的生长试验和12 d的消化代谢试验,总计42 d。结果表明:①与对照组相比,陈化玉米组对生长猪的平均日采食量(ADFI)、平均日增重(ADG)和料重比(F/G)无显著影响(P>0.05);②与对照组相比,陈化玉米组对生长猪的粗蛋白质表观消化率极显著提高了10.10%(P<0.01),对灰分表观消化率极显著降低了36.63%(P<0.01);③与对照组相比,陈化玉米组对生长猪天门冬氨酸、苏氨酸、丝氨酸、甘氨酸、缬氨酸、赖氨酸、组氨酸和精氨酸的表观消化率分别极显著的提高了9.85%、10.09%、6.58%、16.17%、14.78%、12.00%、7.45%和5.56%(P<0.01),对谷氨酸、丙氨酸和胱氨酸的表观消化率显著提高了3.48%、4.11%和4.71%(P<0.05),对异亮氨酸的表观消化率有提高的趋势(P=0.071);④与对照组相比,陈化玉米组对生长猪的饲粮表观消化能和代谢能无显著影响(P>0.05)。结果提示,饲粮中使用60%的陈化玉米对生长猪的生长性能、干物质、粗脂肪、粗纤维、酸性洗涤纤维、中性洗涤纤维的表观消化率以及饲粮表观消化能和代谢能的影响不显著,但能极显著提高粗蛋白质和氨基酸的表观消化率。     

低蛋白饲粮添加植酸酶和非淀粉多糖酶对生长猪生长性能和养分排泄量的影响

试验旨在研究低蛋白质饲粮添加植酸酶和非淀粉多糖(NSP)酶对生长猪生长性能、养分排泄量的影响。54头平均初始体重为(41.92±2.6)kg的杜长大三元杂交猪分为3组,每组3个重复,每个重复6头猪。1组为对照组(饲粮粗蛋白质水平为17.4%),2、3组为试验组,2组在1组基础上,饲粮粗蛋白质水平降至14.3%、总磷水平降低0.1个百分点,添加植酸酶;3组在2组基础上添加NSP酶,试验期38 d。试验结果表明,2组的平均日增重、料重比比1组分别提高7.64%和1.94%(P0.05),其余各组间差异不显著(P0.05);粪N浓度2、3组比1组分别降低18.58%、23.01%(P0.05);粪P浓度2、3组比1组分别降低40.23%、39.08%(P0.01)。由此可见,将常规饲粮粗蛋白质水平降低3个百分点、总磷水平降低0.1个百分点,并添加植酸酶,能显著提高生长猪平均日增重,显著减少粪氮含量,极显著减少粪磷含量;在此基础上,继续添加NSP酶不影响生长猪生长性能和粪中养分含量。     

The effect of Lupinus albus seeds on digestibility,performance and gastrointestinal tract indices in pigs

The effect of soya bean meal (SBM) substitution in the diet with white lupine (WL) seeds on performances and some parameters of the digestive tract of pigs were studied. The digestibility experiment was performed on 30 pigs using difference method combined with marker method, where one group was offered basal diet and in diet of experimental groups 25% of the basal diet was substituted with SBM or WL meal. The growth experiment was conducted on 48 pigs of approximately 20 kg body weight. The animals from the control group were fed with diet containing SBM, whereas in the experimental groups 50% or 100% of SBM was substituted with WL seeds. At the end of the experiment, eight pigs from each group were euthanized, and digesta and tissues were sampled. The apparent total tract digestibility of crude protein and dry matter was higher (p < 0.05), but crude fibre and ether extract were lower (p < 0.05) in the WL seeds than in SBM. Substituting 50% of SBM in the control diet with WL seeds did not affect significantly pig performance. Total substitution of SBM with WL seeds impacted negatively pigs growth and feed intake (p < 0.05), but it did not affect the length of villi and crypt depth. It also significantly increased ileum digesta viscosity and ammonia concentration in the ileum and caecum digesta. In the ileal digesta of animals offered WL seeds, an increased (p < 0.05) total bacterial and Enterobacteriaceae numbers were found, whereas reduced number of yeast and mould was found in the caecal digesta. The substitution of 50% SBM with WL seeds in the growing pig diet did not affect pigs' results, but the total substitution significantly decreased the performance of pigs and affected intestinal ecology.     

The impact of gastrointestinal parasites infection on slaughter efficiency in pigs

The aim of the present study was to determine an influence of parasites invasion on fodder consumption and slaughter yield of fatteners in three different maintenance systems. The experimental part of the study was conducted on pigs farm producing in a close cycle. The study on internal parasites of fatteners were conducted based on coproscopic methods. In order to describe the relationship between following variables: meatiness, slaughter yield, fodder consumption and mean EPG value, the principal component analysis (PCA) was used. The analysis between fodder consumption and maintenance system and fodder consumption and helminths infection did not demonstrate any significant relationship. The analysis between slaughter yield and meatiness and an infection demonstrated in turn a decrease in both parameters values in the two maintenance systems, i.e. in fatteners kept on litter meatiness decrease in infected fatteners of 4.2% and yield of 1.7%. On slatted floor meatiness decrease in infected fatteners of 6.1% and yield of 2.7%. The decreasing tendency in meat content (3.7%) and in slaughter yield (1.1%) was also observed in fatteners maintained on deep litter, however the values were not significant statistically.     

Nutritional value of a genetically improved high-lysine, high-oil corn for young pigs

Two experiments were conducted to compare the nutritional adequacy of a genetically improved high-lysine, high-oil corn (HLHOC; .408% lysine, 6.21% fat, as-fed basis) and a high-oil corn (HOC; .289% lysine, 5.97% fat, as-fed basis) for young growing pigs. Experiment 1 used four non-littermate barrows (initially 20.0 kg BW) fitted with ileal T-cannulas in a crossover-designed digestion study. The .75% total lysine diets contained 8.5% casein and an equal amount of lysine (.25%) from the test corn. Apparent ileal digestibilities of amino acids, GE, DM, and CP were similar (P > .10) between diets. Apparent ileal lysine digestibilities were 65 and 71% for the HOC and HLHOC, respectively, assuming the lysine in casein to be 100% digestible. Experiment 2 used 100 barrows reared in a segregated early-weaning environment (initially 8.3 kg BW and 27 d of age) to evaluate five corn-soybean meal-based diets in a 2 x 2 factorial arrangement with main effects being corn type and dietary lysine (.80 or 1.15% digestible lysine). The fifth diet consisted of the .80% digestible lysine HOC diet supplemented with .23% additional L-lysine x HCl (.975% digestible lysine) to verify that lysine was the limiting amino acid in the low-lysine diets. Increasing digestible lysine from .80 to 1.15% increased (P < .001) ADG and gain/feed (G/F) regardless of corn variety. Combined ADG and G/F were .347 kg and .641 and .443 kg and .790 for the .80 and 1.15% digestible lysine diets, respectively. Within lysine level, corn type did not affect ADG, ADFI, or G/F (P > .10). The results of these studies indicate that the lysine in HLHOC is as available as the lysine in HOC and that HLHOC can be used successfully in swine diets.     

Effect of variety and drying method on the nutritive value of corn for growing pigs

Background

This experiment was conducted to determine the nutritive value of corn from the north of China for growing pigs. The experiment examined corn variety (LS1, LS2, LS3 and LS4) grown in one location, drying method (sun dried and artificially dried) and different drying temperatures. Corn harvested at 20-25% moisture was dried to about 12% moisture by sun drying and artificially drying at 80, 100, or 120°C in a fluidized bed dryer. Ninety-six barrows (average BW of 33.4 ± 2.7 kg) were housed in individual metabolism crates to facilitate separate collection of feces and urine. A five-day collection period followed a seven-day diet acclimation period.

Results

The results indicated that variety significantly influenced (P < 0.01) the 1,000 kernel weight of corn but not the bulk weight. Variety also influenced the available energy content (digestible energy of dry matter, P < 0.01; metabolisable energy of dry matter, P < 0.01) and digestibility of organic matter (P < 0.01), as well as dry matter (P < 0.01) and gross energy (GE) content (P < 0.02). The drying method of corn significantly influenced the 1,000 kernel weight (P < 0.01), bulk weight (P < 0.01) and digestibility of ether extract (EE) (P < 0.01). No effect of drying temperature on the digestibility of organic matter, dry matter (DM), crude protein (CP), neutral detergent fiber (NDF), acid detergent fiber (ADF) and gross energy was observed, but gelatinization (P < 0.05) and test weight (P < 0.01) decreased with an increase in temperature.

Conclusions

Variety has a significant impact on the nutritive value of corn for growing pigs, and greater attention needs to be paid to these influences in the assignment of the nutritive value of corn given to growing pigs.     

Effect of variety and drying method on the nutritive value of corn for growing pigs

Background：This experiment was conducted to determine the nutritive value of corn from the north of China for growing pigs.The experiment examined corn variety（LS1,LS2,LS3 and LS4）grown in one location,drying method（sun dried and artificially dried）and different drying temperatures.Corn harvested at 20-25%moisture was dried to about 12%moisture by sun drying and artificially drying at 80,100,or 120℃ in a fluidized bed dryer.Ninety-six barrows（average BW of 33.4 ± 2.7 kg）were housed in individual metabolism crates to facilitate separate collection of feces and urine.A five-day collection period followed a seven-day diet acclimation period.Results：The results indicated that variety significantly influenced（P〈0.01）the 1,000 kernel weight of corn but not the bulk weight.Variety also influenced the available energy content（digestible energy of dry matter,P〈0.01;metabolisable energy of dry matter,P〈0.01）and digestibility of organic matter（P〈0.01）,as well as dry matter（P〈0.01）and gross energy（GE）content（P〈0.02）.The drying method of corn significantly influenced the 1,000 kernel weight（P〈0.01）,bulk weight（P〈0.01）and digestibility of ether extract（EE）（P〈0.01）.No effect of drying temperature on the digestibility of organic matter,dry matter（DM）,crude protein（CP）,neutral detergent fiber（NDF）,acid detergent fiber（ADF）and gross energy was observed,but gelatinization（P〈0.05）and test weight（P〈0.01）decreased with an increase in temperature.Conclusions：Variety has a significant impact on the nutritive value of corn for growing pigs,and greater attention needs to be paid to these influences in the assignment of the nutritive value of corn given to growing pigs.     

玉米蛋白粉营养价值评定及其评定技术的研究

试验选用6头平均体重(50.9±2.73)kg生长猪,应用套算法(The Difference Method),采用全消化道收粪技术,按6×6拉丁方试验设计,测定玉米蛋白粉的氮(N)、中性洗涤纤维(NDF)、酸性洗涤纤维(ADF)、干物质(DM)、总能(GE)和消化能(DE)及其表观消化率,待测原料包括4种不同粗蛋白质含量的玉米蛋白粉(CP 63%、CP 52%、CP 47.5%和CP 32%,CGM).4种玉米蛋白粉(CP 63%、CP 52%、CP 47.5%和CP 32%)的表观消化能分别为4234、4029、4023和4244 kcal/kg,氮表观消化率分别为92.3%～96.3%;总能表观消化率分别为79.7%～89.7%;干物质表观消化率分别为82.7%～88.0%(P＜0.05).加工工艺影响玉米蛋白粉的养分表观消化率.采用套算法测定玉米蛋白粉的养分消化率,要求待测试验日粮中的被测养分含量满足动物对该养分的最低需要量.     

去皮豆粕和普通豆粕对肉鸡生产性能及营养素利用率的影响

本试验选用192只1日龄AA肉公鸡,随机分成2个处理组,每个处理设6个重复,每个重复16只鸡,采用玉米-豆粕型饲粮,比较去皮豆粕和普通豆粕对肉鸡生产性能及营养素利用率影响的差异。结果表明:去皮豆粕对各阶段肉鸡的采食量、增重及料重比均无显著影响(P>0.05);去皮豆粕组饲粮粗蛋白质利用率比普通豆粕组提高8.80%(P<0.05),去皮豆粕组饲粮粗灰分、钙、磷利用率分别比对照组提高2.54%、4.63%、4.37%,但差异均不显著(P>0.05)。