Damron B L, Harms R H, Stepp L F
Poult Sci. 1985 Sep;64(9):1772-6. doi: 10.3382/ps.0641772.
Two experiments were conducted with day-old broiler chicks from 1 to 21 days of age to measure the relative bioavailability of sodium from three commercially available defluorinated phosphates and two reagent sources (monosodium and dibasic sodium phosphate) compared to sodium chloride as the standard. Ten chicks were assigned to each pen in the first experiment and eight chicks in the second. Each diet was fed to three pens of males and three pens of females within an experiment. Feed-grade sodium chloride was added to a basal feed containing dicalcium phosphate in increments of .05% (0 to .25%) to provide total sodium levels from 180 to 967 ppm. Each of the defluorinated materials was substituted into the dicalcium basal at a level sufficient to provide one-half of the supplemental phosphorus. Reagent phosphate sources were added to the basal in amounts sufficient to supply .059% sodium, the same amount as provided by .15% sodium chloride. Reagent grade ammonium chloride was added to treatment diets to ensure a level of .156% total chloride. Mortality was related to sodium level and was excessive only for the treatment receiving no supplementation. Significant manure moisture increases were associated with up to .10% supplemental sodium chloride. Slope-ratio calculations of sodium availability, using body weight and daily sodium intake, revealed average availability values over the experiment ranging from 83.9 to 89.8% for the three defluorinated sources. Availability for monobasic sodium phosphate was calculated to be 91.8%, while that of the dibasic source was somewhat higher at 97.2%.
进行了两项试验，对象为1至21日龄的一日龄肉鸡雏鸡，目的是测定三种市售脱氟磷酸盐和两种试剂来源（磷酸二氢钠和磷酸氢二钠）中钠的相对生物利用率，并与作为标准的氯化钠进行比较。在第一个试验中，每个围栏分配10只雏鸡，第二个试验中为8只。在一个试验中，每种日粮喂给三只雄性围栏和三只雌性围栏。将饲料级氯化钠以0.05%（0至0.25%）的增量添加到含有磷酸二钙的基础饲料中，以使总钠水平从180 ppm提高到967 ppm。将每种脱氟材料以足以提供一半补充磷的水平替代到磷酸二钙基础饲料中。将试剂级磷酸盐源以足以提供0.059%钠的量添加到基础饲料中，该量与0.15%氯化钠提供的量相同。将试剂级氯化铵添加到处理日粮中，以确保总氯水平为0.156%。死亡率与钠水平有关，仅在未补充钠的处理组中过高。粪便湿度显著增加与高达0.10%的补充氯化钠有关。使用体重和每日钠摄入量对钠利用率进行斜率比计算，结果显示在整个试验中，三种脱氟来源的平均利用率值在83.9%至89.8%之间。磷酸二氢钠的利用率计算为91.8%，而磷酸氢二钠的利用率略高，为97.2%。
