TY  - SER
AU  - Maklad,Eman H.M.
AU  - Motawe,H.F.A.
AU  - Ead,H.M.E.
AU  - Elshafey,S.
TI  - Effect of adding sodium nitrate without or with some feed additives in growing rabbit diets on: 1. growth performance and economic efficiency
KW  - Rabbits
KW  - Feeding and feeds
KW  - Growth.	
KW  - Sodium nitrate.	
KW  - Feed additives
KW  - Yeast as feed
N1  - Includes bibliographic reference
N2  - Ninety, 7 weeks of age weaning New Zealand White (NZW) rabbits with similar average live body weight (745 g) were used in this study. 
Rabbits were randomly distributed into 10 equal groups (each group contains 9 animals) and housed in separate cages (3 rabbits in each). 
The experimental groups were fed randomly on one of the 10 formulated experimental diets used. Sodium nitrate addition for these diets 
was at two levels. The first level was 0.0 % of the total mixed diet for diet 1 (R1), diet 2 (R2), diet 3 (R3), diet 4 (R4) and diet 5 (R5), 
while the second level was 2 % of the total mixed diet for diet 6 (R6), diet 7 (R7), diet 8 (R8), diet 9 (R9) and diet 10 (R10). 
The diets R1 and R6 were without feed additives, while the four feed additives which were used, sodium sulphate, bentonite (clay), 
yeast and prebiotic for diets R2, R3, R4 and R5 respectively and also, in corresponding diets R7, R8, R9 and R10, respectively.
The main results showed that live body weight (LBW) was higher with feeding on R1, R4. R5, R9 and R10 than feeding on the other 
experimental diets. The average daily gain from 7 to 14 weeks were higher when feeding on the control without NaNO3 (R1) or when 
added yeast or prebiotic as shown in R4 or R5 respectively, and with adding NaNO3 with yeast or prebiotic R9 or R10, respectively 
than the others.The average feed conversion ratio (FCR) from 7 to 14 weeks was the highest when feeding on R2, R3, R4, R6, R7, R8 
and R9, while the lowest ratio values were with feeding on R1 and R10. The relative economic efficiency was decreased with feeding 
on the experimental diets than feeding on R1 diet. The highest value of LBW was recorded with diets R1, R4, R5, R9 and R10. 
However, more research works are required to clarifying the effects of these additives on economic efficiency in different 
experimental conditions with high levels of sodium nitrate than used herein.

Keywords: performance, feed utilization, economic efficiency

UR  - http://nile.enal.sci.eg/EALE/2020/MUJAPP/1120/9/359.pdf
ER  -