Hulled and hull-less barley grains with the genetic trait for low-phytic acid increased the apparent total-tract digestibility of phosphorus and calcium in diets for young swine1
Abstract:A 35-d experiment was conducted using 63 crossbred pigs (35 barrows and 28 gilts) with an initial average BW of 7.0 kg and age of 28 d to evaluate the efficacy of the low-phytic acid (LPA) genetic trait in hulled or hull-less barley in isocaloric diets. Hulled barleys were the normal barley (NB) cultivar Harrington and the near-isogenic LPA mutant 955 (M955) with P availabilities of 36 and 95%, respectively. Hull-less lines were produced by crossing NB and the LPA mutant 422 line with a hull-less line, produci… Show more
“…Apart from causing physiologic deficiencies, this leads to increased P inputs in agricultural systems, as fed P passes through the animal without being internalised. It was shown that a reduction of the phytate content of fodder from 0.18% to 0.04% while maintaining P concentrations could lead to a decline in excreted P of approximately 75% (Veum and Raboy 2016).…”
While geological phosphate reserves are continually depleting and effective phosphorus (P) recycling methods are still being developed, more efficient fertilisation of P can help to avoid unnecessary losses of this nutrient. In this way, environmental damage resulting from excessive P inputs to agricultural soils could also be reduced. The aim of this study is to identify a P concentration which is optimal for high seed quality of one cultivar of spring wheat and spring barley in addition to possessing a high nutritional value. While a critical threshold at 1.65 mg P/g grain for the studied barley cultivar has been identified, above which germination capacity and power were close to 100%, no such concentration was applicable to wheat. This concentration is well below the widely accepted doctrine, which calls for a P concentration of 2 mg/kg and could thus lead to a lower and thus more efficient use of the nutrient. Furthermore, in this study, an estimation of food quality by the molar ratio of phytate of the two micronutrients iron and zinc illustrates that such a concentration could only be found for zinc but not for iron.
“…Apart from causing physiologic deficiencies, this leads to increased P inputs in agricultural systems, as fed P passes through the animal without being internalised. It was shown that a reduction of the phytate content of fodder from 0.18% to 0.04% while maintaining P concentrations could lead to a decline in excreted P of approximately 75% (Veum and Raboy 2016).…”
While geological phosphate reserves are continually depleting and effective phosphorus (P) recycling methods are still being developed, more efficient fertilisation of P can help to avoid unnecessary losses of this nutrient. In this way, environmental damage resulting from excessive P inputs to agricultural soils could also be reduced. The aim of this study is to identify a P concentration which is optimal for high seed quality of one cultivar of spring wheat and spring barley in addition to possessing a high nutritional value. While a critical threshold at 1.65 mg P/g grain for the studied barley cultivar has been identified, above which germination capacity and power were close to 100%, no such concentration was applicable to wheat. This concentration is well below the widely accepted doctrine, which calls for a P concentration of 2 mg/kg and could thus lead to a lower and thus more efficient use of the nutrient. Furthermore, in this study, an estimation of food quality by the molar ratio of phytate of the two micronutrients iron and zinc illustrates that such a concentration could only be found for zinc but not for iron.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.