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Research ArticleResearch Section

Utilizing swine effluent for sprinkler-irrigated corn production

M. M. Al-Kaisi and R. M. Waskom
Journal of Soil and Water Conservation March 2002, 57 (2) 111-120;
M. M. Al-Kaisi
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R. M. Waskom
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ABSTRACT:

The rapid expansion of large swine production facilities in northeast Colorado prompted a need to evaluate the impact of swine effluent applied on irrigated corn grown on sandy soil. The objectives of this study were I) to evaluate the use of swine effluent as a nutrient source for irrigated corn production, 2) to evaluate the response of irrigated corn grown on sandy soils to different application rates, and 3) to evaluate N movement through the soil profile under swine effluent and commercial-N fertilizer for irrigated conditions. The three year study started in 1995 on a 14.5 ha (36 ac) sprinkler-irrigated (center pivot) Valent sand field, (Mixed, mesic Ustic Torripsamments) planted to grain corn (Zea mays L.). Both swine effluent and commercial-N fertilizer treatments were applied at four N rates labeled control, low, agronomic, and high. All treatments were replicated three times in a randomized complete block (RCB) design. Approximately 90% of the total nitrogen from the two-stage lagoon effluent was in ammoniacal form, and the total dry matter content of the effluent was only 0.1 - 0.2% by volume. Corn yields increased with the increase of both swine effluent and commercial-N fertilizer rates. In contrast to the swine effluent treatments, significant soil-N buildup was observed at the 1.5 -3.0 m (5 -10 ft) depths for the commercial-N fertilizer treatments. Higher total N and P plant removal for the swine effluent treatments resulted in little N accumulation below the root zone. As the swine effluent application rate increased, the plant N and P removal and recovery rate increased, even at rates of 50 kg N ha−1 (45 Ib N ac−1) above the recommended agronomic rate. An increase in extractable P in the top 15 cm (6 in) of the soil was observed in the effluent-treated soils. The results indicate that managing swine effluent-N becomes very similar to managing commercial-N fertilizer under irrigated conditions.

Footnotes

  • Mahdi M. Al-Kaisi is an assistant professor in the Agronomy Department at Iowa State University, Ames, Iowa, and Reagan M. Waskom is a research scientist in the Department of Soil and Crop Sciences at Colorado State University, Fort Collins, Colorado.

  • Copyright 2002 by the Soil and Water Conservation Society

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Journal of Soil and Water Conservation: 57 (2)
Journal of Soil and Water Conservation
Vol. 57, Issue 2
March/April 2002
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Utilizing swine effluent for sprinkler-irrigated corn production
M. M. Al-Kaisi, R. M. Waskom
Journal of Soil and Water Conservation Mar 2002, 57 (2) 111-120;

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Utilizing swine effluent for sprinkler-irrigated corn production
M. M. Al-Kaisi, R. M. Waskom
Journal of Soil and Water Conservation Mar 2002, 57 (2) 111-120;
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