Submitted to: Agronomy Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: 7/10/2002
Publication Date: 10/31/2002
Citation: Israel, D.W., Burton, J.W. 2002. Evaluation of nonnodulating soybean lines as receiver crops for n from swine lagoon effluent. Agronomy Abstracts.CD File A05-Israel 43104-oral.pdf.
Technical Abstract: The swine industry needs more effective N receiver crops for management of swine-lagoon-effluent spray fields. The capacity of experimental nonnodulating soybean lines (N97-2996, N99-3341, N99-3342) to accumulate N from applied lagoon effluent in seed was evaluated in comparison to their nonnodulating parent (D68-0099) at two locations in the Coastal Plain of North Carolina. At N levels of 210 to 250 kg plant available N/ha as lagoon effluent, the nonnodulating experimental line (N99-3341) exhibited significantly greater (P<0.05) seed yield and seed N accumulation capacity than its nonnodulating parent and the N97-2996 and N99-3342 experimental lines. Seed dry weight yields of N99-3341 averaged 3150 kg/ha and its seed N accumulation averaged 216 kg/ha for two locations. These values represent 13 % greater seed yield and 17% greater seed N accumulation compared to the nonnodulating parent. Since all 216 kg N /ha accumulated in seed is derived either from effluent or residual soil N, line N99-3341 represents an environmentally sound tool for management of lagoon effluent spray fields.