Abstract
Preliminary results show that two-year average total nitrogen (N) runoff losses and ortho-phosphorus (P) and total P runoff losses in the second year were greater with N-based turkey litter/no-till applications than Pbased turkey litter or fertilizer-only applications. Incorporation of turkey litter applied based on N requirements resulted in N and P losses that did not differ from losses from P-based or fertilizer-only treatments. Chemical and statistical analyses of third-year samples will allow for final results and interpretation.
Highlights
Surface runoff losses of nutrients and sediments are significant threats to surface water quality
Preliminary results show that two-year average total nitrogen (N) runoff losses and ortho-phosphorus (P) and total P runoff losses in the second year were greater with N-based turkey litter/no-till applications than P-based turkey litter or fertilizer-only applications
Incorporation of turkey litter applied based on N requirements resulted in N and P losses that did not differ from losses from P-based or fertilizer-only treatments
Summary
Surface runoff losses of nutrients and sediments are significant threats to surface water quality. The use of poultry litter as an alternative to fertilizer is of particular interest in southeastern Kansas because large amounts of poultry litter are imported from nearby confined animal feeding operations in Arkansas, Oklahoma, and Missouri. Incomplete information is available comparing relative nutrient losses in surface runoff following poultry litter applications to crop ground compared with using only commercial fertilizers. This is especially true for tilled soil compared with no-till, because production of most annual cereal crops on the claypan soils of the region is often negatively affected and is rarely improved by planting with no-tillage. The objectives of this study were to compare surface runoff losses of N and P nutrients and sediment from fertilizer and poultry litter and to determine the influence of tillage on nutrient and sediment losses in surface runoff from the use of fertilizer and poultry litter
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