Zhang, Xu Effects of enzyme supplementation on the nutrient, amino acid, and energy utilization efficiency of citrus pulp and hawthorn pulp in Linwu ducks. [electronic resource] - Tropical animal health and production Aug 2018 - 1405-1410 p. digital Publication Type: Evaluation Study; Journal Article ISSN: 1573-7438 Standard No.: 10.1007/s11250-018-1587-6 doi Subjects--Topical Terms: Amino Acids--metabolismAnimal Feed--analysisAnimal Nutritional Physiological PhenomenaAnimalsCitrusCrataegusDiet--veterinaryDietary SupplementsDigestion--drug effectsDucksEnergy Metabolism--drug effectsEnzymes--administration & dosageRandom Allocation