Soil nitrogen and phosphorus availability for field-applied slurry from swine fed traditional and low-phytate corn

J. S. Paschold, B. J. Wienhold, R. B. Ferguson, D. L. McCallister

Research output: Contribution to journalArticlepeer-review

Abstract

Swine (Sus scrofa) slurry contains nutrients essential for crop production but usually contains more P relative to N than is required by most crops, creating the potential for negative environmental impacts. Diet modifications such as low-phytate corn (Zea mays L.) have resulted in improved bioavailability of P and reduced manure P content. A field study was conducted to compare in situ availability of N and P at two sites. One site received three annual additions of manure from swine fed low-phytate corn or traditional corn diets or inorganic fertilizer, surface applied to rainfed no-till sorghum [Sorghum bicolor (L.) Moench]. A second site received a one-time application and incorporation of the same nutrient treatments to irrigated corn. Nutrient treatments were applied at rates intended to meet crop N needs. At both sites, an in situ soil core resin bag technique was used to determine available N and P during the growing season. Potentially mineralizable N was 70% of applied N and extractable P was 100% of applied P for manure from both diets. Incorporation of swine slurry reduced potentially mineralizable N to 40% the year of application and 30% the year after application and reduced extractable P to 60% the year of application and 40% the year after application for both diets. Modified diets reduced the P content of the manure but not the availability of N or P.

Original languageEnglish (US)
Pages (from-to)1096-1101
Number of pages6
JournalSoil Science Society of America Journal
Volume72
Issue number4
DOIs
StatePublished - Jul 2008

ASJC Scopus subject areas

  • Soil Science

Fingerprint

Dive into the research topics of 'Soil nitrogen and phosphorus availability for field-applied slurry from swine fed traditional and low-phytate corn'. Together they form a unique fingerprint.

Cite this