科研之友
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摘要
Poultry litter (PL) application to fields used to produce leguminous crops has merit as a sound nutrient management practice. Our research objective was to determine whether soybean [Glycine max (L.) Merr.] fertilized with PL produced similar leaf tissue and seed nutrient concentrations and grain yield as soybean fertilized with equivalent P and K rates supplied by commercial fertilizer (CF). Twelve trials were established between 2005 and 2010. Poultry litter treatments supplied 29 to 39 (low) and 58 to 78 (high) kg P ha(-1). The low rate corresponded to 1890 to 2894 kg litter ha(-1) and supplied 49 to 77 kg K and 76 to 106 kg total N ha(-1). The CF treatments provided equivalent amounts of total P and K as the PL. Eight of the 12 trials included N fertilizer alone and N, P, and K fertilizers as treatments. Eight site-years showed yield increases for P and K applied as CF or PL, resulting in soybean yields that were 181 to 617 kg ha(-1) greater, a 4.5 to 14.4% increase, than soybean receiving no P and K. Fertilization, regardless of nutrient source, had the greatest influence on trifoliolate leaf P and K concentrations at site-years where seed yields were increased by CF or PL. In general, leaf P and K concentrations were similar between CF and PL applied at equal rates. Poultry litter is a legitimate P and K alternative to CF for soybean grown on soils that require P and K to maximize yield.
- 出版日期2013-6
