Nutritional evaluation of low phytate and high protein corns

Douglas, M. W.; Peter, C. M.; Boling, S. D.; Parsons, C. M.; Baker, David H.

doi:10.1093/ps/79.11.1586

Cited by 35 publications

(17 citation statements)

References 16 publications

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“…In broiler experiments conducted with normal or low-phytate corn and corn byproducts, positive improvements in growth performance have also been noted (Douglas et al 2000;Peter and Baker 2002). Adding the test ingredients increased the concentrations of NPP as well as amino acids in the test diets compared to that of the basal and reference diets.…”

Section: Growth Performance and Tibia Biomechanical Properties And Asmentioning

confidence: 92%

Relative bioavailability of phosphorus in low-phytate soybean meal for broiler chicks

Sands¹,

Ragland²,

Wilcox³

et al. 2003

Can. J. Anim. Sci.

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Relative bioavailability of phosphorus in low-phytate soybean meal for broiler chicks. Can. J. Anim. Sci. 83: 95-100. A 14-d chick bioassay was conducted to estimate the relative bioavailability (RBV) of P in a low-phytate soybean meal (LPSBM) using slope-ratio techniques. A corn-soybean meal basal diet was formulated to supply total P and Ca at 3.3 and 10.5 g kg -1 , respectively. Three reference diets were formulated by the addition of 0, 0.5 or 1.0 g kg -1 total P from monosodium phosphate (MSP). Four test diets were formulated by the addition of 0.5 or 1.0 g kg -1 total P from LPSBM or soybean meal (SBM). The additions of MSP, LPSBM, or SBM were made at the expense of corn starch. A diet consisting of the basal diet plus supplemental methionine, lysine, threonine and tryptophan was also included to confirm that response to diets containing LPSBM or SBM was not due to the higher concentration of amino acids in those diets. Each diet was randomly assigned to six replicate cages of four birds. Birds were fed from 1 to 3 wk of age. Body weight gain (P < 0.01) and feed intake (FI, P < 0.05) increased linearly as supplemental dietary P increased from 0 to 1.0 g kg -1 for chicks fed diets containing MSP or LPSBM. Chicks that received the basal P level had the lowest body weight gain and FI. No differences were observed between the basal diet and the amino-acid-supplemented basal diet in any of the response criteria measured indicating that the response to tests was due to the increasing levels of dietary P. Tibia mineral content (TMC) and tibia ash weight (ASH) increased linearly (P < 0.001) in response to supplemental P from MSP, LPSBM and SBM. The RBV for LPSBM and SBM using ASH as the response criteria were estimated at 52 ± 10% and 36 ± 8%, respectively. The RBV for LPSBM and SBM using TMC as the response criteria were estimated at 61 ± 9% and 39 ± 7%, respectively. The RBV of LPSBM was 12 to 16 percentage points higher than SBM depending on the response criteria used for estimating RBV. The results of this study clearly indicate that P from LPSBM is more bioavailable than P from SBM.Key words: Chicks, phosphorus, low-phytate soybean meal, bioavailability, slope-ratio Sands, J. S., Ragland, D., Wilcox, J. R. et Adeola, O. 2003. Biodisponibilité relative du phosphore dans le tourteau de soja à faible teneur en phytate servi aux poulets de chair. Can. J. Anim. Sci. 83: 95-100. Les auteurs ont essayé d'estimer la biodisponibilité relative (BR) du P présent dans un tourteau de soja à faible teneur en phytate (TSFTP) par la technique du ratio de la pente. Avec du maïs et du tourteau de soja, ils ont préparé une ration fournissant aux oiseaux 3,3 g de P et 10,5 g de Ca par kilo, puis ont formulé trois rations de référence en ajoutant à la précédente 0, 0,5 ou 1,0 g de P par kilo sous forme de phosphate monosodique (PM). Ils ont ensuite créé quatre rations expérimentales en ajoutant 0,5 ou 1,0 g de P par kilo sous forme de TSFTP ou de tourteau de soja (TS). Le PM, le TSFTP ou le TS remplaçaient la fécule de maïs. Les ...

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Section: Growth Performance and Tibia Biomechanical Properties And Asmentioning

confidence: 92%

Relative bioavailability of phosphorus in low-phytate soybean meal for broiler chicks

Sands¹,

Ragland²,

Wilcox³

et al. 2003

Can. J. Anim. Sci.

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“…2001, 2002). However, to date these studies have only compared two lines of a given crop, one normal line and one low phytate line, and the level of reduction in seed phytic acid in the low phytate line has, with one exception (Douglas et al . 2000), ranged from 50 to 66%.…”

Section: Introductionmentioning

confidence: 99%

Mineral availability from barley low phytic acid grains in rainbow trout (Oncorhynchus mykiss ) diets

Overturf¹,

Raboy²,

Cheng

et al. 2003

Aquaculture Nutrition

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Phosphorus storage within plant seeds occurs mainly as phytic acid, which has profound implications on the use of seeds as food material. Phytic acid phosphorus is unavailable to non‐ruminants, leaches ionic minerals during digestion, and is excreted at elevated levels as a waste product. This presents a problem in nonruminant livestock production including current efforts to develop renewable grain and legume products for use in fish feeds. The development of lines of several cereal grain species that have reduced seed phytic acid concentration provides a novel approach to dietary and environmental problems associated with seed phytic acid. Utilizing four isogenic strains of barley (one normal for seed phytic acid, and three low phytic acid lines that produce seeds with approximately 50, 70 and 95% reductions in phytic acid) the apparent digestibility of nutrients in formulated diets containing these barleys at a level of 30% was measured using rainbow trout (Oncorhynchus mykiss). Also examined was the apparent availability of several minerals including phytate phosphorus and total phosphorus. Results from these studies corresponded well with the results of other animal studies that evaluated low phytic acid cereal grains. With increasing reductions in seed phytic acid, seed available phosphorus increased and faecal phosphorus was reduced by up to 50%. Calcium availability increased, copper and sulphur decreased, and the other tested minerals demonstrated either increased or decreased availability in a manner uncorrelated to grain phytic acid concentration.

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“…The TAADs of LPM were not different from those of NM in the current study, suggesting that reducing the phytate in maize did not improve the AA digestibility in ducks. With the precision-fed rooster assay, Douglas et al (2000) found that the digestibility of AAs in LPM were at least equal to and possibly greater than those in NM, because the TAADs in LPM were higher than those in NM for 8 AAs and do not significantly differ for the others. Most of the TAADs for LPSBM in experiment 2 were observed to be higher than those of NSBM, except those for histidine, cysteine and tyrosine that were not different indicating that, for ducks, the available AAs in LPSBM are higher than those in NSBM.…”

Section: Value Of Ingredients For Ducksmentioning

confidence: 93%

Metabolisable energy and amino acid digestibility of high-oil maize, low-phytate maize and low-phytate soybean meal for White Pekin ducks

Adeola

2005

British Poultry Science

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1. Two experiments were conducted to determine the metabolisable energy and amino acid digestibilities of high-oil maize (HOM), low-phytate maize (LPM) and low-phytate soybean meal (LPSBM) as compared with normal maize (NM) and normal soybean meal (NSBM) using male White Pekin ducks. 2. In the first experiment, the TMEN (kJ/g) value of HOM (16.58) was higher than that of NM (16.05), but that of LPM (16.11) did not differ from those of HOM or NM. The true digestibility coefficients for methionine (0.874, 0.871 or 0.876), lysine (0.805, 0.816 or 0.813) and tryptophan (0.946, 0.959 or 0.960) did not differ among NM, LPM and HOM, respectively. The average true digestibility coefficients for all amino acids in NM, LPM or HOM (0.886, 0.890 or 0.900, respectively) did not differ among the three ingredients. 3. In the second experiment, the TMEN value of LPSBM (12.39) was approximately 8% higher than that of NSBM (11.46). The true digestibility coefficients for most amino acids were higher for LPSBM than for NSBM, except in the case of histidine, cysteine and tyrosine, which were not different. The average true digestibility coefficient for all amino acids in LPSBM (0.945) was higher than in NSBM (0.924). 4. Results of the two experiments indicate that the energy and amino acids in the feed ingredients evaluated were well utilised by ducks and that LPSBM has a higher energy value as well as digestible essential amino acid concentration than NSBM for ducks.

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Nutritional evaluation of low phytate and high protein corns

Cited by 35 publications

References 16 publications

Relative bioavailability of phosphorus in low-phytate soybean meal for broiler chicks

Relative bioavailability of phosphorus in low-phytate soybean meal for broiler chicks

Mineral availability from barley low phytic acid grains in rainbow trout (Oncorhynchus mykiss ) diets

Metabolisable energy and amino acid digestibility of high-oil maize, low-phytate maize and low-phytate soybean meal for White Pekin ducks

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