The manganese requirement of broilers under Philippine conditions

Date

1979

Degree

Bachelor of Science in Agriculture

Major Course

Major in Animal Science

College

College of Agriculture and Food Science (CAFS)

Adviser/Committee Chair

Perla L. Lopez

Abstract

A total of 390 day-old broiler chicks of commercial strain were randomly and equally distributed into ten dietary treatments. Each treatment had 3 replications with thirteen (13) birds per replicate. The basal ration was formulated to contain 3,000 ME/kg of feed, 21% CP, 0.90% calcium, 0.45% available phosphorus and 5 ppm manganese. The basal ration was supplemented with manganese. The basal ration supplemented with manganese in the form of sulfate or dioxide at 25,50, 75 and 100 ppm manganese. One group was fed a commercial broiler ration which served as a check diet.

Upon analysis, the basal ration contained 15 ppm manganese thus further supplementation of manganese in sulfate and dioxide form increased the manganese content of the diet from 5,25,50,75 and 100 ppm manganese to 15, 40, 65, 90 and 115 ppm manganese, respectively.

There was no significant difference (P>0.05) noted on feed consumption, body weight and feed conversion efficience of birds under the different dietary treatments. However, feed consumption tend to decrease with increasing manganese level in the diet. Likewise, body weights of birds consistently increase as the level of total manganese was increased to 65 ppm total manganese. Beyond this level, the body weight decrease slightly and was maintained at this level.

Similarly, there was no significant difference (P>0.05) in body weight sand feed conversion efficiency between birds fed basal diet with manganese sulfate or dioxide supplementation, which suggest that the availability of manganese in either from was apparently the same.

The number of affected birds under the different dietary treatments shows that complete prevention was not possible even when manganese content was increased to 115 pp, total manganese. This would indicate that manganese was not totally available to the chicks.

Most of the affected birds died because of starvation due to their inability to move about freely to obtain enough feed. Autopay report of the Department Veterinarian claimed that birds died of starvation and dehydration under severe perotic conditions.

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

LG 993.5 1979 A5 A43

Document Type

Thesis

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