A survey of broiler litter composition and potential value as a nutrient resource

Broiler litter can serve as a source of nutrients for plants and ruminant animals. Analyses of litter samples collected from 106 sources in Alabama showed that the nutrient content of litter varies widely. Litter nitrogen averaged 4·0% (24·9% crude protein (CP)), but ranged from 2·3% (14·4% CP) to 6·0% (37·5% CP). Phosphorus averaged 1·56% and potassium 2·32% of dry matter. The average N:P:K ratio of the litter was 3:3:2. Ash was extremely variable, ranging from 8·9% to 64·3%, and averaging 24·7%. Ash content was higher p<0·05) in samples taken after the litter was removed from the broiler house (28·6%) than in samples taken directly from the broiler house (20·2%). Nitrogen and acid detergent soluble nitrogen were negatively correlated (p<0·01) with ash, while acid detergent fiber and most minerals were positively correlated with ash. At current prices, average quality broiler litter in Alabama is valued at US$113.67 Mg⁻¹ (US$104.95 Imperial ton⁻¹) as a potential low-cost feed ingredient for lactating beef cattle and US$31.23 Mg⁻¹ (US$27.59 Imperial ton⁻¹) as a fertilizer.