Department of Veterinary Science, Ludwig-Maximilians-University, Munich, Germany.
J Anim Physiol Anim Nutr (Berl). 2017 Dec;101(6):1324-1330. doi: 10.1111/jpn.12653. Epub 2017 Mar 16.
In the present investigation, the impact of diet composition on urine pH in rabbits was compared with previous studies on rabbits, cats, dogs, pigs and horses. A total of 13 dwarf rabbits were fed six different diets with a cation-anion balance (CAB) between -39 and +320 mmol/kg dry matter (DM) using ammonium chloride (NH Cl) as an acidifier. CAB was calculated as follows: CAB (mmol/kg DM) = 49.9Ca + 82.3Mg +43.5Na + 25.6K - 59P - 62.4S - 28.2*Cl; minerals in g/kg DM. Urine, faeces and blood were collected. Urine pH ranged from 5.26 ± 0.22 at a CAB of -39 mmol/kg DM to 8.56 ± 0.24 at a CAB of +320 mmol/kg DM. A low CAB in the feed reduced blood pH and blood base excess significantly. Renal excretion of Ca, P, Na and Mg and water was significantly higher in rabbits eating acidifying diets. In comparison with other species, rabbits reacted to acidifying diets in a similar way as cats, dogs and pigs. Rabbits on a mildly alkalizing diet, however, had a trend to higher urine pH than other monogastric species on such diets (cats, dogs, pigs, horses).
在本研究中，比较了不同饮食成分对兔子尿液 pH 值的影响，并与之前关于兔子、猫、狗、猪和马的研究进行了比较。使用氯化铵（NH4Cl）作为酸化剂，共 13 只矮兔被喂食六种不同的日粮，其阳离子-阴离子平衡（CAB）在-39 至+320mmol/kg 干物质（DM）之间。CAB 按如下方式计算：CAB（mmol/kg DM）=49.9Ca+82.3Mg+43.5Na+25.6K-59P-62.4S-28.2*Cl；矿物质以 g/kg DM 计。收集尿液、粪便和血液。尿液 pH 值范围为 CAB 为-39mmol/kg DM 时的 5.26±0.22 至 CAB 为+320mmol/kg DM 时的 8.56±0.24。饲料中的低 CAB 显著降低了血液 pH 值和血液碱剩余。吃酸化日粮的兔子的肾脏对 Ca、P、Na 和 Mg 的排泄以及水的排泄明显增加。与其他物种相比，兔子对酸化日粮的反应与猫、狗和猪相似。然而，吃轻度碱性日粮的兔子的尿液 pH 值有高于其他单胃动物（猫、狗、猪、马）的趋势。
