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Runoff losses of N and P after low phosphorus swine slurry application to no-tillage sorghum

Permanent URL:
http://handle.nal.usda.gov/10113/42260
Abstract:
Swine (Sus scrofa) manure can serve as a fertilizer source for crop production, but it typically contains more P relative to N than the crop requires, creating the potential for P losses in runoff. A 3-year study was conducted to compare runoff losses of NO3-N, NH4-N, total N, dissolved P, and total P under natural rainfall conditions from no-tillage sorghum plots [Sorghum bicolor (L.) Moench] receiving inorganic fertilizer, manure from swine fed low-phytate corn (Zea mays L.) diet, or manure from swine fed a traditional corn diet. Runoff (26.5 mm in 1999, 14.2 mm in 2000, and 1.6 mm in 2001), sediment loss (2.9 kg ha−1 in 1999, 0.9 kg ha−1 in 2000, and 0.4 kg ha−1 in 2001), and runoff nutrient losses differed among years but were similar among treatments within a year. Runoff losses of NO3-N (5.3 g ha−1 in 1999, 1.0 g ha−1 in 2000, and 2.6 g ha−1 in 2001), NH4-N (2.9 g ha−1 in 1999, 0.6 g ha−1 in 2000, and 5.6 g ha−1 in 2001), total N (89.7 g ha−1 in 1999, 8.4 g ha−1 in 2000, and 100.2 g ha−1 in 2001), dissolved P (1.5 g ha−1 in 1999, 0.5 g ha−1 in 2000, and 3.1 g ha−1 in 2001), and total P (3.8 g ha−1 in 1999, 0.9 g ha−1 in 2000, and 3.5 g ha−1 in 2001) from these plots represented less than 1% of that applied each year. Although use of low-phytate corn reduces manure P content, it did not decrease runoff P under these no-tillage conditions.
Author(s):
Wienhold, Brian J. , Gilley, John E.
Subject(s):
pig manure , slurries , soil amendments , losses from soil , nitrogen , phosphorus , agricultural runoff , nitrate nitrogen , ammonium nitrogen , animal manure management , nutrient management , no-tillage , Sorghum bicolor , grain sorghum , swine , swine feeding , nutrient intake , phytic acid , corn , feed composition , Nebraska
Format:
p. 201-206.
Note:
Includes references
Source:
Soil science 2010 May, v. 175, no. 5
Language:
English
Year:
2010
Collection:
Journal Articles, USDA Authors, Peer-Reviewed
File:
Download [PDF File]
Rights:
Works produced by employees of the U.S. Government as part of their official duties are not copyrighted within the U.S. The content of this document is not copyrighted.