摘要
The efficacy of a recombinantly derived microbial phytase (Natuphos 5000®, BASF Corp.) was evaluated in sorghum-soybean meal-based diets of finishing swine. During the 50- to 80- and 80- to 118-kg BW intervals, diets contained .40 and .39% plant P, respectively; control diets fed during the two weight intervals were supplemented with .08 and .04% inorganic P from dicalcium phosphate. The all plant-P diets were supplemented with 0, 300, or 500 phytase units (FTU) per kilogram of diet. Supplemental P (P = .09) and phytase (linear, P = .01) increased growth rate but did not affect feed efficiency. Dietary treatment did not affect quantitative carcass traits, CP, fat, or moisture content of the loin or taste panel scores of the cooked loin other than a quadratic decrease (P = .02) in connective tissue amount as phytase supplementation increased. Apparent ileal and total tract digestibilities of DM, GE, and N were not affected (P > .25) by phytase supplementation, whereas ileal and total tract digestibilities of Ca and P increased (P < .05 or P < .01) with increasing phytase supplementation. Ultimate load and ash content of the third and fourth metacarpals and metatarsals and serum P levels increased in response to inorganic P and phytase supplementation. Pig performance, carcass traits, and bone traits were essentially equal for the 300 and 500 FTU/kg treatments. These results show that phytase effectively liberates P in sorghum-based diets, and that 300 FTU/ kg (or less) will optimize performance and carcass merit of finishing swine.
摘要译文
重组衍生的微生物植酸酶（Natuphos 5000？，BASF Corp.）的效力在整理猪的基于高粱 - 豆粕的膳食中评估。在50至80和80至118公斤的BW间隔期间，饮食分别含有0.40％和0.39％的植物P.在两个重量间隔期间喂养的对照饮食补充了.08和。来自磷酸二钙的04％无机磷。所有的植物磷日粮补充0,300或500每千克日粮的植酸酶单位（FTU）。补充P（P \x3d .09）和植酸酶（线性，P \x3d。01）增加生长速度但不影响饲料效率。膳食处理不影响定量胴体性状，CP，脂肪，或随着植酸酶补充量的增加，除了结缔组织量的二次减少（P \x3d 0.02）之外，熟腰部的腰部或味道评分值的水分含量。添加植酸酶对DM，GE和N的表观回肠消化率和全消化道消化率没有影响（P 0.25），而Ca和P的回肠消化率和全消化道消化率增加（P 0.05）。05或P .01）随着植酸酶补充量的增加。响应无机磷和植酸酶补充，第三和第四掌骨和跖骨的极限负荷和灰分含量以及血清P水平增加。猪的表现，胴体性状，对于300和500 FTU / kg治疗，骨骼特征基本相同。这些结果表明，植酸酶有效地释放高粱型日粮中的磷，并且300 FTU / kg（或更低）将优化整理猪的性能和胴体品质。
P. R. O'Quinn;D. A. Knabe;E. J. Gregg. Efficacy of Natuphos in sorghum-based diets of finishing swine[J]. Journal of Animal Science, 1997,75(5): 1299–1307