101363 Nitrogen Loss and Residue Breakdown Potential for Fall-Applied Diammonium Phosphate.
Poster Number 134-100
See more from this Division: Students of Agronomy, Soils and Environmental Sciences (SASES)
See more from this Session: Undergraduate Research Contest - Poster Section III
Abstract:
This study found that after applying 336 kg/ha of DAP in the fall, there was no remaining nitrogen from the DAP application the following spring to a depth of 0-30 cm or 30-60 cm. These results demonstrated that fall-applied nitrogen from DAP had begun to leach through the soil profile within one month of application, and it was lost entirely by April.
Residue breakdown contribution was evaluated through stalk integrity and weight loss over time as compared to an untreated control. Variables tested were 224 kg/ha of DAP, 28 l/ha of UAN, and 28 l/ha of UAN + Breakdown (bacterial agent). As expected, stalk integrity decreased and weight loss increased over time. However, there was no significant difference in stalk integrity or weight loss among treatments at any point in time or in any soil type. None of the treatments decomposed faster than the untreated control group.
See more from this Division: Students of Agronomy, Soils and Environmental Sciences (SASES)
See more from this Session: Undergraduate Research Contest - Poster Section III