Liquid swine manure application timing and Instinct(TM) impacts on net soil nitrogen mineralization and corn yield

TL;DRAbstract

Nitrogen (N) is one of the most expensive variable input costs for corn production. Optimized manure management is essential to ensure maximum crop N utilization and to reduce the risk of N loss. A field study was conducted in central Indiana from 2011-2013 to assess liquid swine ( Sus scrofa L.) manure N availability when applied at different times or co-applied with InstinctTM , a microencapsulated form of nitrapyrin. Soil inorganic N contents, soil N mineralization, corn yield, grain N content, whole plant N concentrations of corn at the V6 growth stage, and ear leaf N concentrations of corn at the R1 growth stage differed from year to year and were greatly influenced by manure application timing and climatic conditions. A static cup incubation was used to assess N mineralization from soil samples collected at two depths (0-30 cm and 30-60 cm) at various times after manure application (early winter, planting and corn V6 growth stage). The cumulative net N mineralization was fitted t

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