Nitrogen mineralization from broiler litter applied to southeastern Coastal Plain soils

Hubbard, R.K.; Bosch, D.D.; Marshall, L.K.; Strickland, T.C.; Rowland, D.; Griffin, T.S.; Honeycutt, C.W.; Albrecht, S.L.; Sistani, K.R.; Torbert, H.A.; Wienhold, B.J.; Woodbury, B.L.; Powell, J.M.

doi:10.2489/63.4.182

Cited by 1 publication

(1 citation statement)

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“…However, the proportion of root biomass at the 15-30 cm depth was significantly higher in the inorganic treatment compared to the control and numerically higher litter treatment (Table 5). Previous research indicated that poultry litter provided elevated soil ammonium and nitrate concentrations in a Tifton loamy sand for 21-28 days after application compared to unamended soil [15]. The observed differences in root distribution throughout the profile suggest that under N deficit conditions, napiergrass can respond to differences in N distribution by varying root biomass at depth.…”

Section: Estimates Of Root Biomassmentioning

confidence: 91%

Production of Napiergrass as a Bioenergy Feedstock Under Organic Versus Inorganic Fertilization in the Southeast USA

et al. 2013

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Napiergrass (Pennisetum purpureum Schum.) is a high-yielding perennial biomass crop that is well adapted to the Southeast USA where poultry litter is readily available. This research was conducted to compare biomass production and nutrient utilization of napiergrass fertilized with either poultry litter or inorganic fertilizer. Each spring, approximately 100 kg ha −1 of N, 40 kg ha −1 P, and 90 kg ha −1 K were applied as poultry litter or equivalent inorganic fertilizer. Biomass was harvested each winter after senescence. For the first 2 years, dry matter yield did not differ among treatments, but in the third and fourth years, yields declined in all treatments and were lowest in the unfertilized treatment. Biomass N concentration and N removal were greatest in the inorganic treatment. In general, N removal exceeded the amount applied, suggesting that higher application rates may be necessary to maintain yields. Biomass P concentration and total P uptake were greatest in the litter fertilized treatment, demonstrating that napiergrass can remove some of the excess P from applied litter. Soil cores were taken periodically to assess changes in soil properties. After 2 years of production, soil pH in the surface layer (0-15 cm) was lower in the inorganic treatment than in the other treatments. After 4 years, total soil C had increased by an average of 3,180 kg ha −1 though fertilizer treatments did not differ. Yield declined in all treatments after 4 years and N supplementation is recommended for production in upland fields.

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Section: Estimates Of Root Biomassmentioning

confidence: 91%