Effect of copper levels in swine manure on corn and soil
- Purdue Univ., West Lafayette, IN
Effects of Cu levels in liquid swine manure were studied for 5 y on corn (Zea mays L.) and Crosby silt loam soil (Aeric Ochraqualfs). Pigs housed on slatted floors above pits were fed 16% crude protein corn-soy diets with either 0, 125, or 250 mg/kg of supplemental Cu as CuSO/sub 4/. Swine manure (3.2 - 5.2% dry matter) collected from the anaerobic pits was surface-applied annually to soil at rates of 90, 180, and 270 t/ha for 4 y. No manure was applied the fifth year to determine the effects of residual nutrients. Check and inorganic fertilizer (168 kg N/ha, 56 kg P/ha, 112 kg K/ha) treatments were also included. Supplemental CuSO/sub 4/ in the swine diet increased Cu levels in manure and consequent Cu application to the soil. Copper-enriched manure increased the 1N HCl-extractable Cu in the upper portion of the soil profile (0-31 cm), but not at lower depths. High Cu applications from manure did not elevate plant leaf Cu concentrations, and did not adversely affect corn yields. Corn yields and leaf composition were not affected by rate of manure application since crop nutrient requirements were exceeded. Applied K and NO/sub 3//sup -/-N moved downward in the soil profile, but a majority of these nutrients in soil were depleted by the end of the study. In contrast, applied P accumulated in the upper soil profile (0-31 cm). Application of liquid swine manure from pigs fed a high level of CuSO/sub 4/ over a 4-y period at the rates used in this study did not lead to excessive soil accumulation or enrichment of corn tissue with Cu.
- OSTI ID:
- 6903633
- Journal Information:
- J. Environ. Qual.; (United States), Journal Name: J. Environ. Qual.; (United States) Vol. 12:2; ISSN JEVQA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
AGRICULTURAL WASTES
ANIMALS
BIOLOGICAL EFFECTS
CEREALS
COPPER
DOMESTIC ANIMALS
ECOLOGICAL CONCENTRATION
ELEMENTS
GRAMINEAE
GRASS
LEAVES
MAIZE
MAMMALS
MANURES
METALS
ORGANIC WASTES
PLANTS
PRODUCTIVITY
SOILS
SWINE
TRANSITION ELEMENTS
VERTEBRATES
WASTES