Phosphorus Dynamics from Broiler Breeder Diets in Manure, Soil, and Corn.

plant availability;phytase;phytate;orthophosphate;soil;phosphorus;manure;broiler breeder

Casteel, Shaun Nathan ; Daniel W. Israel, Committee Co-Chair,John T. Brake, Committee Co-Chair,Carl Crozier, Committee Member,Rory Maguire, Committee Member,Edgar Oviedo, Committee Member,Casteel, Shaun Nathan ; Daniel W. Israel ; Committee Co-Chair ; John T. Brake ; Committee Co-Chair ; Carl Crozier ; Committee Member ; Rory Maguire ; Committee Member ; Edgar Oviedo ; Committee Member

University:North Carolina State University

关键词: plant availability;    phytase;    phytate;    orthophosphate;    soil;    phosphorus;    manure;    broiler breeder;   

Others  :  https://repository.lib.ncsu.edu/bitstream/handle/1840.16/5198/etd.pdf?sequence=1&isAllowed=y

美国|英语

来源: null

【 摘 要 】

Studies of broiler breeder diet modifications to reduce phosphorus (P) excretion have evaluated bird performance, but no studies have quantified the effects of P in the manure and the impacts to soil and plant availability once soil-applied.Four diets were formulated by factoring two levels, 0.40 and 0.22% available P (NRC, Low, respectively), with or without phytase during the breeder laying phase (wk 22 to 64).Breeders fed phytase produced manures with 15% lower total P concentration, but did not change manure water-soluble P (WSP).However, P in the breeder manures was > 92% orthophosphate.The incubation of the four unique manures in samples of Portsmouth (Typic Umbraquult) and Wagram (Arenic Kandiudult) series generally did not differ in concentrations of Mehlich-3 P, soil WSP, total inorganic P, and total P.Phosphorus-based applications of breeder manures (NRC, Low) and triple superphosphate (TSP, Ca[H2PO4]2 H2O) were applied to a P-deficient, Portsmouth soil in the greenhouse to determine the response of corn (Zea mays).Corn growth was equal among P sources in the initial study, but it tended to be greater in the soils amended with breeder manures in the residual study due to the P applied and the apparent liming effect of the soil.The NRC and Low breeder manures were applied at 39 kg P ha-1 in 2007 at Salisbury (Typic Rhodudult), Lewiston (Aquic Paleudult), and Plymouth (Typic Umbraquult), which ranged in soil P levels.Plymouth included TSP and an untreated control.Corn growth was equal among soils amended with the breeder manures NRC and Low in all site-years and grain P removal was equal five out of six site-years.Grain production, grain P removal, and applied P recovery were equal among P sources in 2007, but the breeder manure treatments were greater than TSP in 2008.Breeder manures should be considered equivalent to TSP in P impacts to the soil and plant availability.