02277nam a2200325 a 450000100080000000500110000800800410001910000180006024500500007826000360012830000100016450000190017452015470019365000090174065000240174965000090177365000090178265000140179165000170180565000100182265000100183265000100184265000230185265000100187565000090188565000110189465300190190565300190192465300080194314319802022-06-07       1972    bl uuuu  m   00u1 u    #d1 aLAVORENTI, A.  aUtilization of dietary iron by pigs and rats.  aPurdue: Purdue Universityc1972  a151p.  aTese Doutorado  aA series of experiments with pigs and 1 experiment with rats was carried out to study the utilization of iron from corn, soybean meal, limestone and dicalcium phosphate. In an attempt to produce iron-deficiency anemia in pigs, and to study the effects of iron, cooper and zinc supplementation on performance and hemoglobin concentration, corn-soybean meal diets without iron supplementation, or fortified with 100 ppm of iron from ferrous sulfate were fed to eighty 18.6 kg pigs reared in two environments: concrete floored pens washed once daily and non-washed concrete floored pens, until they reached market weight. Two levels of copper (6 and 250 ppm) and two levels of zinc (50 and 500 ppm) were tested. No significant differences in gain, feed intake, feed efficiency or hemoglobin level were observed between the pigs receiving the 5 experimental diets. Addition of 250 ppm of copper increased gains by 7.40% and addition of 100 ppm of iron increased hemoglobin by only 0.20 grams per 100 milliliters of blood. Anemia was not observed during the experimental period. In another study (experiment 3) forty 4.7 kg pigs were used to study the effect of iron injection (100 mg) and iron addition (100 ppm) to a corn-soybean meal diet on gain and hemoglobin. The possible effect of the iron content of the drinking water was also considered. Hemoglobin levels were significantly higher (P &lt .01) in pigs which received the combinations of injected iron and iron added to the diet. No case of anemia was observed during the experimental...  acorn  adicalcium phosphate  adiet  airon  alimestone  asoybean meal  aswine  aDieta  aFerro  aFosfato de Cálcio  aMilho  aRato  aSuíno  aFarelo de soja  aPedra calcaria  aRat