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FECAL PHOSPHORUS EXCRETION FROM BROILER CHICKS FED DIETS CONTAINING LOW-PHYTATE BARLEY Low phytic acid grains in poultry diets can reduce P concentrations in feces, but the influence on feces P composition is relatively unknown. We analyzed feces from poultry fed one of four barley based diets. The barley varieties used to generate the diets consisted of wild-type barley (Copeland, ...
ENVIRONMENTAL IMPLICATIONS OF INOSITOL PHOSPHATES IN ANIMAL MANURES Over-application or mismanagement of manure can degrade surface and groundwater quality with excess nutrients. Phosphorus (P) is a particular problem, because it can accumulate in soil to concentrations above those needed for optimum crop production. As a result long-term manure application to agr...
THE INFLUENCE OF MANURE PHYTIC ACID ON PHOSPHORUS SOLUBILITY IN CALCAREOUS SOILS Land application of manure can increase phosphorus (P) transfer in runoff, although the risk depends in part on the characteristics of the manure. We assessed this for calcareous soils using manures from poultry (layers or broilers) fed a variety of grain based diets with a range of total P, water ...
PHOSPHORUS AVAILABILITY TO BARLEY FROM MANURES AND FERTILIZERS ON A CALCAREOUS SOIL Phosphorus (P) is a limiting soil nutrient for many crops; however, P losses in runoff from agricultural lands are implicated in the degradation of water quality in many regions. We conducted a growth chamber study to determine the relative P solubility and plant P availability of manure and fertil...
LINKING MANURE PROPERTIES TO SOIL PHOSPHORUS SOLUBILITY: IMPORTANCE OF THE CARBON TO PHOSPHORUS RATIO Land application of manure can increase P transfer in runoff, although the risk depends in part on the characteristics of the manure. We assessed this for calcareous soils using swine manures with a range of total P (6.8'4.9 g P per kg), water-soluble P (4.3'8.0 g P per kg), and C:P ratios (31'67)....
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