Phytase
Improvement Phosphorus Utilization
An experiment was conducted to determine the effects of microbial
phytase on performance and nutrient utilization in tilapia. A
plant-based diet containing 32.5% wheat, 24.5% soybean meal, 22.5%
corn and 11.5%wheat gluten was supplemented with 500, 750, 1000
or 1250 FTU/kg of two sources of microbial phytase. Four tanks
of all-male Nile tilapia, weighing about 23.5g, were fed the experimental
diet for 60 days. Phytate supplementation significantly improved
(P<0.01) growth, feed conversion ratio, protein efficiency
ratio, and energy, protein and phosphorus utilization. Ash and
phosphorus content of the scale and vertebra were also significantly
increased due to improved phosphorus availability in the diet.
These results support the use of microbial phytase in improving
phytate phosphorus use and reducing the need for inorganic phosphorus
supplementation.
Liebert, F. and L. Portz. 2005. Nutrient utilization of Nile tilapia
Oreochromis niloticus fed plant based low phosphorus supplemented
with graded levels of different sources of microbial phytate.
Aquaculture 248: 111-119.
An experiment with White Leghorn layers was conducted to determine
the effect of microbial phytase supplementation of low-phytate
phosphorus diets on egg production, eggshell quality, bone mineralization
and retention of nutrients. Four isonitrogenous, isocaloric diets
were formulated containing four levels of non-phytate phosphorus.
Results of this study indicated that the addition of microbial
phytase (500 FTU/kg diet) allowed the reduction of non-phytate
phosphorus content to 1.2g/kg in the layer diet, eliminated need
for inorganic phosphorus supplementation and significantly reduced
nitrogen and phosphorus excretion without affecting the production
performance of the layers.
Panda, A.K. and co-workers. 2005. Effect of microbial phytase
on production performance of White Leghorn layers fed on a diet
low in non-phytate phosphorus. Br. Poultry Sci. 46(4): 464-469.
Distillers’ Dried Grains with Solubles-Swine
In the September issue of Pork Magazine, a practical article was
written on the use of distillers’ dried grains with solubles.
The article featured comments by Duane Reese an Extension Swine
Specialist in Nebraska. Highlights of the article were:
- Two hundred pounds of DDGS and three pounds of limestone will replace 178 pounds of corn and 19 pounds of soybean meal and six pounds of dicalcium phosphate in swine finishing rations.
- Feeding up to ten percent DDGS in a grower-finisher diet will deliver about the same performance as a corn-soybean based diet, however, one needs to pay attention to the diet’s effect on carcass yield. He indicates that for each one percent of DDGS added to the finishing diet, carcass yield is reduced by 0.04 percent on the average. The article provides a table showing prices that could be paid for DDGS while maintaining margins over feed similar to the corn/soybean meal rations at various corn prices and assuming carcass yield reductions.
- The article discussed some other concerns that should be considered; such as: the relatively poor quality of protein found in DDGS compared to soybean meal; the compositional variation found in DDGS sources; and the possibility of mycotoxins present in DDGS since mycotoxins in corn will be concentrated in DDGS during the fermentation process.
Bottom line are
that that DDGS is a relatively new feed ingredient that has value
in swine feeding operations. Its value to the swine producer will
be determined by its nutrient composition, price and ability to
address some feed formulation concerns.
Will Feeding
DDGS Improve your bottom line? Pork Magazine, September 2007
The SOYBEAN
MEAL INFORMATION CENTER is sponsored by the Soybean Checkoff: Including
the checkoff boards from, Iowa, Illinois, Indiana, Kentucky, Michigan, Minnesota and Nebraska