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首页> 美国卫生研究院文献>Journal of Animal Science >Adverse effects on growth performance and bone development in nursery pigs fed diets marginally deficient in phosphorus with increasing calcium to available phosphorus ratios
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Adverse effects on growth performance and bone development in nursery pigs fed diets marginally deficient in phosphorus with increasing calcium to available phosphorus ratios

机译：对幼儿园生长性能和骨髓发育的不良影响喂养磷含量缺乏磷的饮食随着钙的增加至可用磷比

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The objective of this experiment was to evaluate the growth performance and bone mineral content (BMC) of nursery pigs in response to increasing total calcium (Ca) to available phosphorus (aP) ratios in diets containing phytase (250 FTU/kg; Natuphos E, BASF, Florham Park, NJ). A total of 480 nursery pigs (body weight (BW) = 5.7 ± 0.6 kg) with 10 pigs per pen and 7 pens per treatment (6 pens fed 2.75:1 diet) were allotted to seven treatments consisting of increasing ratios of calcium to available phosphorus (Ca:aP): 1.25, 1.50, 1.75, 2.00, 2.25, 2.50, and 2.75. From day −7 to 0, pigs were fed a common diet. They were then fed the treatment diets during two experimental phases from day 1 to 14 and 15 to 28, respectively. Available P was formulated to 0.33% and 0.27% (approximately 90% of requirement) in dietary phases 1 and 2, respectively. BW, average daily gain (ADG), average daily feed intake (ADFI), and gain-to-feed ratio (G:F) were determined. BMC of the femur was measured on day 28 on one pig per pen using dual x-ray absorptiometry. Data were analyzed as a linear mixed model using PROC MIXED (SAS, 9.3). Orthogonal polynomial contrasts were used to determine the linear and quadratic effects of increasing the Ca:aP. Over the 28-d experimental period, increasing Ca:aP resulted in a linear decrease in ADG (353, 338, 328, 304, 317, 291, and 280 g/d; P < 0.01), ADFI (539, 528, 528, 500, 533, 512, and 489 g/d; P < 0.05), and G:F (0.68, 0.66, 0.64, 0.62, 0.61, 0.59, and 0.58; P < 0.01). Increasing Ca:aP also resulted in decreased BW on days 14 and 28 (P < 0.01). The BMC of the femur decreased with increasing Ca:aP (6.2, 6.3, 5.7, 5.9, 5.5, 5.6, and 5.3 g; P < 0.05). Regression analysis explained the impact of Ca:aP as follows on ADG (ADG [g/d] = 339 − 36x; r2 = 0.81), G:F (G:F = 0.61 – 0.03x; r2 = 0.72), and BMC (BMC [g] = 6.4 – 0.27x; r2 = 0.43), where x is the Ca:aP. In conclusion, all outcomes indicated that any level of calcium above the minimum used in this experiment impaired growth performance and skeletal development. Further research using even lower levels of dietary Ca is warranted.
机译：该实验的目的是评估苗养猪的生长性能和骨矿物含量（BMC），响应于含有植酸酶的饮食中的总钙（CA）对可用磷（AP）比率（250ftu / kg; natuphos e，巴斯夫，Florham Park，NJ）。共有480只幼儿园（体重（BW）= 5.7±0.6±0.6千克），每笔猪和每次治疗7张钢笔（喂食2.75：1饮食6票），分配给七种治疗方法，包括增加钙的比例磷（CA：AP）：1.25,1.50,1.75,2.00,2.25,2.50和2.75。从第7天到0，猪喂养常见的饮食。然后在两次实验阶段分别在第1至14和15至28天的两种实验阶段内喂养治疗饮食。可用的P分别在膳食阶段1和2中配制成0.33％和0.27％（约90％的要求）。测定平均每日增益（ADG），平均每日进料摄入（ADFI）和增益对饲料比（G：F）。使用双X射线吸收测定法在每支猪的一猪上的第28天测量股骨的BMC。分析数据作为使用Proc混合（SAS，9.3）作为线性混合模型。使用正交多项式对比度来确定增加Ca：AP的线性和二次效果。在28-D实验期间，增加Ca：AP导致ADG的线性减少（353,338,328,304,317,291和280g / d; P <0.01），ADFI（539,528,528 ，500,533,512和489g / d; p <0.05）和G：F（0.68,0.66,0.64,0.62,0.61,0.59和0.58; P <0.01）。增加CA：AP也导致第14天和第28天（P <0.01）降低了BW。股骨的BMC随着Ca的增加而降低：AP（6.2,6.3,5.7,5.9,5.5,5.6和5.3g; P <0.05）。回归分析解释了Ca：ap的影响如下（ADG [G / D] = 339-36x; R2 = 0.81），G：F（g：F = 0.61-0.03x; R2 = 0.72）和BMC （BMC [G] = 6.4 - 0.27倍; R2 = 0.43），其中X是CA：AP。总之，所有结果表明，任何高于该实验中使用的最低钙的钙，增长性能和骨骼发育都受损。有必要使用甚至较低水平的膳食CA进一步研究。

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