Nutrient Uptake by Cool-Season Annuals and Overseeded Bermudagrass Fertilized with Swine Lagoon Effluent.
(S08-mclaughlin553523-poster)
Authors:
M.R. McLaughlin* - USDA-ARS
K.R. Sistani - USDA-ARS, Bowling Green, KY T.E. Fairbrother - USDA-ARS, Mississippi State, MS D.E. Rowe - USDA-ARS, Mississippi State, MS
Abstract:
Common and hybid bermudagrasses were overseeded with cool-season annuals in tests comparing total hay yield and nutrient uptake in swine lagoon effluent spray fields. Overseeding treatments included berseem clover, crimson clover, ryegrass, wheat, and a control which was not overseeded. Testing was done at two locations in 2000, 2001, and 2002. Established bermudagrass was overseeded annually in mid-October. Hay was harvested five times each year at 6-wk intervals beginning in April. Total (annual + bermudagrass) dry matter (DM) hay yield and N and P uptake were measured. Ryegrass- and berseem clover-treated plots yielded more DM and removed more N and P than the control and averaged 10.9 and 10.8 Mg DM ha-1 yr-1, respectively, compared with 9.4 Mg DM ha-1 yr-1 for the control. Wheat- and crimson clover-treated plots yielded 10.4 and 9.7 Mg DM ha-1 yr-1, respectively.
The berseem clover treatment removed more N than other treatments, averaging 241.9 kg ha-1 yr-1, compared with 207.1, 204.4, 197.2 and 189.3 kg ha-1 yr-1 for ryegrass, wheat, crimson clover and control treatments, respectively. Ryegrass and berseem clover treatments removed an average of 31.2 and 30.6 kg P ha-1 yr-1, respectively, followed by wheat, crimson clover, and control treatments at 29.7, 28.1, and 27.0 kg P ha-1 yr-1, respectively. Overseeding increased nutrient removal in the hay spray field system.
Speaker Information: Michael McLaughlin, USDA-ARS, 810 Hwy 12 E - POB 5367, Mississippi State, MS 39762-5367; Phone: 662-320-7407; E-mail: [email protected]
Session Information: Monday, November 3, 2003, 4:00 PM-6:00 PM Presentation Start: 4:00 PM (Poster Board Number: 1520)
Keywords: cool-season annual forage; nutrient management; manure management; nutrient uptake