Performance and some blood plasma constituents of lactating goats fed diets containing formaldehyde treated dried poultry manure

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Abstract: Thirty lactating Zaraibi goats were used in a feeding trial of 5 treatments (6 animals each ) for 112 days. All goats were fed on whole corn silage as a forage sole forage to cover 50% of their total crude protein requirements and the other 50% was provided from : 1- concentrate feed mixture ( CFM, control), 2- 15% CFM- protein + 35% formaldehyde treated dried poultry manure protein (FDPM- protein ), 3- 15% CFM- P + 35% untreated DPM ( UDPM), 4- 35% CFM-P + 15% FDPM-P, 5-35% CFM-P +15UDPM-P. Fifteen Zaraibi bucks were involved in 5 digestion trils three bucks each, to evaluate the nutritive value of the 5 tested rations. The main results showed that inclusion of both levels of DPM increased significantly (p< 0.05) CP and CF digestibility, while that of NFE decreased (p< 0.05), compared with the control. There were no pronounced differences in nutritive value among all tested rations in terms of digestible (DE) and metabolizable (ME) energy (MJ/Kg DM) concentrations, while the digestible CP values (DCP%) of DPM rations were higher (p< 0.05) than the control. At most of sampling times ruminal NH3 – N tended to be higher (p< 0.05) with goats fed DPM rations than the control, being the highest with the higher DPM level( 35%) and vice versa. No significant differences were detected among most of blood constituents of all groups of lactating goats, except of urea- N and NH3 –N which followed the same trend as the recorded ruminal NH3 – N. Milk yield and its composition were not significantly affected by inclusion of DPM in tested rations, but average fat and protein yield were slightly decreased (p< 0.05), compared with the control. Generally, the HCHO treatment did not significantly affect most of tested parameters under investigation. The economic efficiency values of DPM rations were economically the best by about 41% and 14% for the 35% and 15% DPM level, respectively, over the control.
It could be concluded that DPM –protein could economically replace up to 35% of total CP requirements of lactating Zaraibi goats without any serious adverse effect on milk yield and its composition as well as blood constituents or animal health in general.
Keywords: zaraibi goats, lactation, dried poultry manure, formaldehyde, milk yield, milk composition.

Publication year

2001

Pages

47-61

Availability location

معهد بحوث الانتاج الحيوانى-شارع نادى الصيد- الدقى- الجيزة

Availability number

Organization Name

Animal Production Research Institute (APRI)

serial title

Egyptian Journal Nutrition and Feeds

ISSN