Phosphorus availability to barley from manures and fertilizers on a calcareous soil

Leytem, A.B. and Westermann, D.T. (2005) Phosphorus availability to barley from manures and fertilizers on a calcareous soil. Soil Science. 170(6):401-412.

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Abstract

High concentrations of animal production in the United States have
increased the concern about the environmental fate of phosphorus (P) in
manures. We conducted a growth chamber study to develop phosphorus
source coefficients (PSCs) for manures and fertilizers typically land applied
and incorporated into calcareous soils of the western United States
as well as to determine the potential plant P availability of these sources.
Six manure types (swine solids from low phytate and regular barley diets,
swine liquid, dairy liquid, beef solid, and dairy compost) and four fertilizer
(mono calcium phosphate, mono ammonium phosphate, polymer-coated
mono ammonium phosphate, and ammonium polyphosphate) P
amendments were applied to two Portneuf soils at a rate of 60 mg P
kg -1 , incubated for 2 weeks, then planted with barley grown for 7 weeks.
Soil samples were analyzed before barley planting and then at 4 and 7
weeks after planting, whereas plant samples were analyzed at 4 and 7
weeks. Increases in soil water soluble (WS-P) and bicarbonate P (Olsen
P) from P additions generally followed the pattern [fertilizer P] > {liquid
manures] > [solid or composted manures]. Plant shoot biomass and plant
P accumulation were similar except swine manures were greater than
inorganic P sources and beef manure was less than both. Determining
relative P solubility of manure and fertilizer sources will be beneficial
when estimating P losses from land application of manures and may be
used to assign weighting coefficients to manure sources in risk assessments
such as a P site index, with limited impact on P availability to
crops.

Item Type:	Article
NWISRL Publication Number:	1174
Subjects:	Irrigated crops > Small grain Manure > Application guidelines > Small grains Manure > Chemistry Soil > Amendments > Fertilizer Soil > Calcareous soil Soil > Chemistry > Phosphorous Mass Import - autoclassified (may be erroneous)
Depositing User:	Users 5 not found.
Date Deposited:	20 Nov 2010 21:49
Last Modified:	01 Nov 2016 15:55
Item ID:	26
URI:	https://eprints.nwisrl.ars.usda.gov/id/eprint/26