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Paper Information

Journal:   IRANIAN JOURNAL OF AGRICULTURAL SCIENCES (JOURNAL OF AGRICULTURE)   2006 , Volume 37 , Number 1; Page(s) 9 To 22.
 
Paper: 

THE EFFECTS OF DIFFERENT NONE PHYTATE PHOSPHOROUS LEVELS AND PHYTASE SUPPLEMENTATION ON PERFORMANCE IN BROILER CHICKS

 
 
Author(s):  KARIMI A.*
 
* FACULTY OF AGRICULTURE, KURDISTAN UNIVERSITY
 
Abstract: 

This study was carried out to investigate the effects of different none phytate phosphorous (nPP) levels and phytase supplementation on performance in broiler chicks. Ross@ straight-run broiler chicks (n=576) were allocated to six dietary treatments, each replicated three times (32 chicks per pen) in a completely randomized design and in a 3x2 factorial arrangements. Three dietary phases were employed, a starter (0-20d), grower (21-40d) and finisher (41-51d): During the experimental periods, the chicks were fed with diets of different nPP levels (0.45,0.38, and 0.31% during starter period, and 0.43,0.36, and 0.29% during grower and finisher periods), with and without 500 F.T.U phytase (Natuphos 10000). Measurements included body weight (BW), daily gain (DG), feed intake (FI) and feed conversion ratio (FCR). The results indicated that nPP levels, did not have any significant effect on broiler performances during starter period, but chicks fed with 0.29% NPP diets, had a significantly lower BW at 40d and 51d,as well as a lower D.G during 21-40 and 1-51d growth periods. Feed intake was not affected by nPP levels. FI (1-20, 20-40d, and 1-50d) and FCR (1-20d) significantly increased with phytase addition to the diets. The effect of interactions between nPP levels and phytase supplementation on BW at 41d was significant, so that the BW in chicks fed with low NPP containing diets was improved. By phytase, whilst BW in chicks fed with high NPP containing diets was adversely affected by phytase supplementation. In conclusion, the results indicated that the negative effect of feeding low NPP diets becomes most evident after 21d of age, and phytase addition to the diets fails in returning performances back to those in the control groups. Further studies are needed to determine the proper NPP levels and phytase dosages during different growth periods.

 
Keyword(s): NONE PHYTATE, PHOSPHOROUS, BROILER, PHYTASE, PERFORMANCE
 
 
References: 
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APA: Copy

KARIMI, A. (2006). THE EFFECTS OF DIFFERENT NONE PHYTATE PHOSPHOROUS LEVELS AND PHYTASE SUPPLEMENTATION ON PERFORMANCE IN BROILER CHICKS. IRANIAN JOURNAL OF AGRICULTURAL SCIENCES (JOURNAL OF AGRICULTURE), 37(1), 9-22. https://www.sid.ir/en/journal/ViewPaper.aspx?id=103257



Vancouver: Copy

KARIMI A.. THE EFFECTS OF DIFFERENT NONE PHYTATE PHOSPHOROUS LEVELS AND PHYTASE SUPPLEMENTATION ON PERFORMANCE IN BROILER CHICKS. IRANIAN JOURNAL OF AGRICULTURAL SCIENCES (JOURNAL OF AGRICULTURE). 2006 [cited 2021May07];37(1):9-22. Available from: https://www.sid.ir/en/journal/ViewPaper.aspx?id=103257



IEEE: Copy

KARIMI, A., 2006. THE EFFECTS OF DIFFERENT NONE PHYTATE PHOSPHOROUS LEVELS AND PHYTASE SUPPLEMENTATION ON PERFORMANCE IN BROILER CHICKS. IRANIAN JOURNAL OF AGRICULTURAL SCIENCES (JOURNAL OF AGRICULTURE), [online] 37(1), pp.9-22. Available: https://www.sid.ir/en/journal/ViewPaper.aspx?id=103257.



 
 
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