Hill G M, Link J E, Rincker M J, Kirkpatrick D L, Gibson M L, Karges K
Michigan State University, East Lansing 48824, USA.
J Anim Sci. 2008 Jan;86(1):112-8. doi: 10.2527/jas.2006-381. Epub 2007 Sep 18.
Two experiments were completed to determine the potential for using distillers dried grains with solubles (DDGS) in diets with or without phytase to provide available P, energy, and protein to highly productive lactating sows without increasing their fecal P. In Exp. 1, the dietary treatments were as follows: (1) corn and soybean meal with 5% beet pulp (BP) or (2) corn and soybean meal with 15% DDGS (DDGS). Besides containing similar amounts of fiber, diets were isonitrogenous (21% CP, 1.2% Lys) and isophosphorus (0.8% P). Sixty-one sows were allotted to dietary treatments at approximately 110 d of gestation (when they were placed in farrowing crates) based on genetics, parity, and date of farrowing. Sows were gradually transitioned to their lactation diet. On d 2 of lactation, litters were cross-fostered to achieve 11 pigs/litter. Sows and litters were weighed on d 2 and 18. Fecal grab samples were collected on d 7, 14, and 18 of lactation. Dietary treatment did not affect the number of pigs weaned (10.9 vs. 10.8) or litter weaning weight. On d 14, DDGS sows had less fecal P concentration than BP sows (28.3 vs. 32.8 mg/g; P = 0.04). Fecal Ca of sows fed DDGS decreased for d 7, 14, and 18 (55.6, 51.4, and 47.1 mg/g of DM, respectively; P = 0.05) but not for BP sows. In Exp. 2, the dietary treatments were as follows: (1) corn and soybean meal (CON), (2) CON + 500 phytase units of Natuphos/kg diet, as fed (CON + PHY), (3) corn and soybean meal with 15% DDGS and no phytase (DDGS), or (4) DDGS + 500 FTU of Natuphos/kg of diet, as fed (DDGS + PHY). Sows (n = 87) were managed as described for Exp 1. Litter BW gain (46.0, 46.3, 42.1, and 42.2 kg; P = 0.25) and sow BW loss (8.1, 7.2, 7.4, and 6.3 kg for CON, CON + PHY, DDGS, and DDGS + PHY, respectively; P = 0.97) were not affected by dietary treatment. Fecal P concentration did not differ among dietary treatments but was reduced at d 14 and 18 compared with d 7 (P = 0.001). However, fecal phytate P concentration was decreased by the addition of DDGS when DDGS and DDGS + PHY were compared with the CON sows except on d 7 (P < 0.05). Sows fed CON diet had greater fecal phytate P than sows fed DDGS, and sows fed DDGS + PHY had less fecal phytate P than sows fed DDGS with no phytase (P = 0.001). Although these experiments were only carried out for 1 lactation, these results indicate that highly productive sows can sustain lactation performance with reduced fecal phytate P when fed DDGS and phytase in lactation diets.
进行了两项试验，以确定在添加或不添加植酸酶的日粮中使用玉米酒糟及其可溶物（DDGS），在不增加高产泌乳母猪粪便磷含量的情况下，为其提供有效磷、能量和蛋白质的潜力。在试验1中，日粮处理如下：（1）玉米和豆粕加5%甜菜粕（BP），或（2）玉米和豆粕加15% DDGS（DDGS）。除了纤维含量相似外，日粮的粗蛋白含量相同（21% CP，1.2% Lys），总磷含量相同（0.8% P）。61头母猪在妊娠约110 d（放入产仔栏时）根据遗传、胎次和产仔日期分配到不同日粮处理组。母猪逐渐过渡到泌乳日粮。在泌乳第2天，仔猪交叉寄养以使每窝达到11头仔猪。在泌乳第2天和第18天对母猪和仔猪进行称重。在泌乳第7、14和18天采集粪便抓样。日粮处理对断奶仔猪数（10.9对10.8）或窝断奶重没有影响。在第14天，DDGS组母猪的粪便磷浓度低于BP组母猪（28.3对32.8 mg/g；P = 0.04）。DDGS组母猪在泌乳第7、14和18天的粪便钙含量降低（分别为55.6、51.4和47.1 mg/g干物质；P = 0.05），而BP组母猪则没有。在试验2中，日粮处理如下：（1）玉米和豆粕（对照组），（2）对照组 + 500单位植酸酶（Natuphos）/千克日粮（对照组 + PHY），（3）玉米和豆粕加15% DDGS且不添加植酸酶（DDGS），或（4）DDGS + 500单位植酸酶（Natuphos）/千克日粮（DDGS + PHY）。87头母猪的管理方式与试验1相同。窝增重（46.0、46.3、42.1和42. kg；P = 0.25）和母猪体重损失（对照组、对照组 + PHY、DDGS和DDGS + PHY组分别为8.1、7.2、7.4和6.3 kg；P = 0.97）不受日粮处理影响。日粮处理间粪便磷浓度没有差异，但与第7天相比，第14天和第18天有所降低（P = 0.001）。然而，将DDGS和DDGS + PHY与对照组母猪相比，除第7天外，添加DDGS可降低粪便植酸磷浓度（P < 0.05）。饲喂对照组日粮的母猪粪便植酸磷含量高于饲喂DDGS的母猪，饲喂DDGS + PHY的母猪粪便植酸磷含量低于不添加植酸酶的DDGS组母猪（P = 0.001）。尽管这些试验仅进行了1个泌乳期，但这些结果表明，高产母猪在泌乳日粮中饲喂DDGS和植酸酶时，可在粪便植酸磷含量降低的情况下维持泌乳性能。
