Nguyen Van Thu , Nguyen Thi Kim Dong and Truong Thanh Trung *

* Correspondence: Truong Thanh Trung (email:

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Sixty Californian rabbits (Oryctolagus cuniculus) at 45 days of age (470±7.93 g) were arranged in a completely randomized design with five treatments and three replications. Four rabbits (2 males and 2 females) were in one experimental unit. Five treatments were protein sources including the meals of soybean extraction, water spinach leave, fish, feather and blood corresponding to SEM; WLM; FM; FEM and BM treatments, respectively. Para grass (Brachiaria mutica) and Centrocema pubescens were a basic diet for rabbits. The dietary crude protein (CP) and metabolizable energy (ME) were formulated at the level of 19.0% and 11.6 MJ/kgDM in the different treatments. The apparent nutrient digestibility and nitrogen retention were observed when rabbits being at 12 weeks of age. The results showed that dry matter and CP intakes were significantly higher (P
Keywords: Californian rabbits, digestible nutrients, meat production, plant protein

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