Effect of Elevated Fat and Protein Corn and Phytase on Nutrient Digestibility and Excretion in Pigs
نویسندگان
چکیده
The current concern of nutrient loading waterways and soils from livestock manure has increased awareness of methods to reduce excess nutrient excretion. The initial methods for nutrient reduction are simple diet manipulations to feed nearer the requirement of the pig. Further modifications have been made to increase digestibility of feedstuffs. The use of genetically modified corns and addition of microbial phytase are known to be effective methods for increasing nitrogen and phosphorus digestibility while reducing nutrient excretion. Two mutant corn hybrids containing the genes, Lpa-1 and Lpa-2, have 66% and 33% less total phytic acid phosphorus, resulting in greater phosphorus availability (Raboy and Gerbasi, 1996). Similar genetic selections have been made to increase protein and energy content of corn. Recently, an elevated fat and protein corn has been developed and has been combined with the low phytic acid gene to create an elevated fat and protein corn with high available phosphorus content.
منابع مشابه
Effects of Mega Doses of Phytase on Growth Performance, Bone Status and Nutrient Excretion of Broilers Fed Diets Containing High Levels of Rice Bran
Phytate in poultry rations containing rice bran (RB) critically reduce poultry performance while increasing N and P excretion. The objective of this study was to determine whether the anti-nutritive problems associated with higher inclusions of rice bran in poultry rations (up to 40%) could be mitigated with mega doses of phytase. Twenty days old male broiler chicks (n=180) in 60 floor pens wer...
متن کاملEffects of low-phytic acid corn, low-phytic acid soybean meal, and phytase on nutrient digestibility and excretion in growing pigs.
Forty-eight grower pigs were used to evaluate the effects of feeding low phytic acid (LPA) corn, LPA soybean meal, normal corn (NC), normal soybean meal (NSBM), and phytase on nutrient digestibility and excretion. Barrows were blocked by BW (initial BW=45.3+/-1.6 kg) and randomly assigned to 1 of 8 dietary treatments in a 2 x 2 x 2 factorial arrangement (6 pigs/treatment). Pigs were fed twice d...
متن کاملEffects of citric and ascorbic acids, vitamin D3 and calcium on efficacy of microbial phytase in a corn-soybean meal-based diet:broiler performance and nutrient digestibility from 1 to 21 of age
متن کامل
Performance and phosphorus balance of pigs fed diets formulated on the basis of values for standardized total tract digestibility of phosphorus.
Three experiments were conducted to test the hypotheses that pigs fed diets that are equal in digestible P will perform equally regardless of the concentration of total P in the diets, and that the addition of microbial phytase, distillers dried grains with solubles (DDGS), or a combination of phytase and DDGS will result in a reduction in P excretion. In Exp. 1, a P-free diet and 6 diets conta...
متن کاملمقایسه اولین فایتاز ایرانی با نوع مشابه وارداتی بر عملکرد، فراسنجههای خون و قابلیت هضم در جوجه گوشتی نر تغذیه شده با سطوح مختلف فسفر
To study the effect of two types of phytase supplementation in 3 levels on performance, blood parameter and nutrient digestibility of male broiler chickens fed diets containing 2 level of phosphourous in a completely randomized design (CRD) experiment with 2×2×3 factorial arrangement and 4 replicates per treatment, 400 Ross male broiler chicks in a 45 days period were evaluated. Treatments were...
متن کامل