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Title: NUTRIENT UPTAKE BY COOL-SEASON ANNUALS AND OVERSEEDED BERMUDAGRASS FERTILIZED WITH SWINE LAGOON EFFLUENT

Author
item McLaughlin, Michael
item Sistani, Karamat
item Fairbrother, Timothy
item Rowe, Dennis

Submitted to: Agronomy Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: 6/1/2003
Publication Date: 11/3/2003
Citation: McLaughlin, M.R., Sistani, K.R., Fairbrother, T.E., Rowe, D.E. 2003. Nutrient uptake by cool-season annuals and overseeded bermudagrass fertilized with swine lagoon effluent [abstract]. Agronomy Abstracts. CD-ROM.

Interpretive Summary:

Technical Abstract: Common and hybrid bermudagrasses were overseeded with cool-season annuals in tests comparing 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 east-central Mississippi 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 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 treatments 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 DM hay yields and nutrient removal in the hay spray field system.