TITLE:
Improving the Dietary Protein Quality by Amino Acid Fortification with a High Inclusion Level of Micro Algae (Spirulina platensis) or Insect Meal (Hermetia illucens) in Meat Type Chicken Diets
AUTHORS:
Carmen Neumann, Susanne Velten, Frank Liebert
KEYWORDS:
N Balance, Growing Chickens, N Utilization Model, Amino Acids, Protein Qual-ity, Spirulina platensis, Hermetia illucens
JOURNAL NAME:
Open Journal of Animal Sciences,
Vol.8 No.1,
December
4,
2017
ABSTRACT: The objective of this study was to measure protein
quality parameters (PPV, NPU and NPUstd) of chicken diets with
complete substitution of soybean meal (SBM) by Spirulina meal (SM) or partly
defatted Hermetia meal (HM). N balance experiments were based on the
quantitative excreta collection method, divided into starter period (10 - 20 d)
and grower period (25 - 35 d). The study utilized 70 all male meat type chicken
(Ross 308). Data assessment applied the exponential N utilization model of the
“Goettingen approach”. The control diet was based on wheat, corn and SBM. In
four experimental diets SBM was completely substituted by SM or HM, but
fortified with feed amino acids (AA) both on a basic level of supplementation
(Lys and Met added equal to the control diet) and on an extended level (Lys,
Met, Thr, Arg, Val, Ile, His added). At a basic level of AA supplementation,
complete replacement of SBM by SM or HM in chicken diets depressed dietary
protein quality significantly (p 0.05). However, the extended level of
AA supplementation improved protein quality parameters of the diets with both
of the alternative proteins significantly (p