Impact of dried distillers grains with solubles (DDGS) and diet formulation method on dry matter, calcium, and phosphorus retention and excretion in nursery pigs

详细信息	查看全文 | 推荐本文 |

• 作者：A.R. Hanson^a ; G. Xu^b ; M. Li^a ; M.H. Whitney^c ; G.C. Shurson^a ; ^{shurs001@umn.edu}
• 关键词：Dried distillers grains with solubles ; Nutrient digestibility ; Phosphorus ; Calcium ; Swine ; Nursery pig
• 刊名：Animal Feed Science and Technology
• 出版年：2012
• 期刊代码：7_03778401
• 类别：abs
• 出版时间：30 March, 2012
• 卷：172
• 期：3-4
• 页码：187-193
• 文件大小：247 K

摘要

Phosphorus (P) is an expensive component in swine diets, and dietary P levels above the pig's requirement can result in excess P excreted in manure and potential environmental concerns. Consequently, utilization of dietary P by pigs must be optimized in order to minimize diet cost and P excretion in manure. Phosphorus and calcium (Ca) balance was evaluated in nursery pigs fed a control maize-soybean meal (M-SBM) diet formulated on a total P (TP) basis, and four experimental diets containing maize dried distillers grains with solubles (DDGS; 100 or 200 g/kg) formulated on either a TP or available P (AP) basis. Barrow pigs (n = 39, initial body weight = 10.37 卤 0.37 kg) were randomly assigned to one of five diets for a 7 d adaptation period followed by a 5 d period of total, separate collection of both urine and feces. Compared to the M-SBM diet, dry matter (DM) digestibility coefficients were reduced in pigs fed diets containing 100 or 200 g/kg DDGS by approximately 0.02 and 0.04 units, respectively (P<0.01). Feed and total P intake were similar among pigs fed control and DDGS diets, but P intake was lower (P<0.01) for pigs fed diets formulated on an AP compared to TP basis. Fecal P concentration was reduced (P<0.01) when diets contained DDGS compared to the M-SBM diet, and when DDGS diets were formulated on an AP basis compared to a TP basis. Total P excretion, retention, and apparent total tract digestibility coefficients were not affected by diet formulation method (FM) or level of DDGS inclusion (P>0.05). Calcium intake tended to be higher (P=0.06), and fecal Ca concentration and retention were higher (P<0.05) for pigs fed the M-SBM diet compared with those fed the DDGS diets. Feeding the 200 g/kg DDGS diets tended to increase (P=0.08) fecal Ca excretion, and reduced (P<0.05) Ca retention, retention coefficient, and apparent total tract digestibility compared to feeding the 100 g/kg DDGS diets. There were no significant effects of FM or DDGS 脳 FM for Ca intake, retention, excretion, or apparent total tract digestibility. These results indicate that increasing dietary DDGS inclusion levels for nursery pigs decreases DM digestibility and fecal P concentration, but does not affect P excretion, retention, or digestibility. Formulating DDGS diets (100 or 200 g/kg) on a TP or AP basis had no effect on P digestibility or total excretion, but total dietary P content is reduced when diets are formulated on an AP basis.