Nitrate Leaching from Continuous Corn, Perennial Grasses, and Poplar in the US Midwest
- Michigan State Univ., East Lansing, MI (United States)
- Central Soil Salinity Research Inst., Karnal (India)
- Michigan State Univ., East Lansing, MI (United States); Cary Inst. of Ecosystem Studies, Millbrook, NY (United States)
Leaching from annual corn (Zea mays L.) crops is a primary source of nitrate (NO3-) pollution of ground and surface waters. Here, we compare NO3- losses from no-till corn with losses from various alternative perennial cropping systems (switchgrass [Panicum virgatum L.], miscanthus [Miscanthus ×giganteus J.M. Greef & Deuter ex Hodkinson & Renvoiz], a native grass mixture, and restored prairie), as well as hybrid poplar (Populus nigra L. × P. maximowiczii A. Henry ‘NM6’), all grown on a well-drained soil in Michigan. Soil water was sampled from below the root zone using suction cup samplers during nonfrozen periods (March–November) between 2009 and 2016. Leaching was estimated from NO3- concentrations in soil water and modeled drainage (percolation) rates. Drainage rates were not significantly different among crops, constituting ~30% of total annual precipitation. Aboveground net primary production (Mg ha-1 yr-1) averaged across the 7 yr was highest in poplar (30.8 ± 1.9 [SE]) followed by miscanthus (23.9 ± 2.4) and corn (20.4 ± 0.9). Volume-weighted mean NO3- concentrations (mg N L-1) and NO3- leaching (kg ha-1 yr-1) averaged across the 7 yr were 9.2 and 34.1, 2.3 and 5.9, and 3.0 and 7.2, respectively, for corn, perennial grasses and poplar. Approximately 10 to 32% of applied N was lost as NO3- from these crops, with the highest percent losses from poplar (32%) followed by corn (20%). Perennial cropping systems leached considerably more NO3- in first few years after planting, but over 7 yr they lost much less NO3- than corn. Perennial crops may therefore help ameliorate NO3- pollution in agricultural landscapes even if they receive modest N fertilization.
- Research Organization:
- Great Lakes Bioenergy Research Center (GLBRC), Madison, WI (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Biological and Environmental Research (BER)
- Grant/Contract Number:
- SC0018409; FC02- 07ER64494
- OSTI ID:
- 1579349
- Journal Information:
- Journal of Environmental Quality, Vol. 48, Issue 6; ISSN 0047-2425
- Publisher:
- American Society of Agronomy, Crop Science Society of America, and Soil Science Society of AmericaCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Long‐term evapotranspiration rates for rainfed corn versus perennial bioenergy crops in a mesic landscape
|
journal | November 2019 |
Similar Records
Leaching losses of dissolved organic carbon and nitrogen from agricultural soils in the upper US Midwest
Data from: Leaching losses of dissolved organic carbon and nitrogen from agricultural soils in the upper US Midwest