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Articles by A.E.M. Mahmoud
Total Records ( 8 ) for A.E.M. Mahmoud
  A.E.M. Mahmoud and H.M. Ebeid
  The objective of the present study was to investigate the effect of inclusion different types of forage in dairy buffaloes rations on the performance of milk production. Twelve multi parous Egyptian buffaloes, after 8 weeks of calving (averaged 550 kg live body weight) were assigned into three groups of 4 buffaloes in 3x3 Latin square design. Each group fed one of the three rations with different kind forage either berseem (R1), berseem plus corn silage (R2) or corn silage (R3). All groups were fed forage plus Concentrate Feed Mixture (CFM) by 50% concentrate: 50% roughage. The digestibility coefficients of DM, CP, CF and cellulose were significantly higher for R1 compare to other tested rations. However, no significant differences noticed among tested rations for OM, EE, NFE, NDF, ADF and hemicelluloses. All tested rations, had nearly similar values of TDN and DE. R1 contained (B) had the highest DCP value (11.81%) followed by R2 (10.25%) contained (B+CS) while R3 contained (CS) had the lowest value (8.63%). No significant differences among the tested groups in both actual and 7% FCM yields. In addition, there were insignificant differences between animals fed all tested rations in lactose, ash and SNF of milk produced. While feeding both kinds of forages (B+CS) and CFM (R2) were significantly increased fat, protein and TS contents compared with feeding R1 and R3. No significant differences were observed among tested groups for feed efficiency as the amount of DM required to produce one kg 7% FCM. While highly significant differences among treatments were detected concerning DCP efficiency. Normal ranges for the blood parameters were observed with no significant differences as the result of feeding all tested rations. Short chain fatty acids were significantly higher with ration contained berseem compared to with rations contained corn silage which had higher values in long chain fatty acids.
  A.E.M. Mahmoud and Wafaa M.A. Ghoneem
  This study aimed to find out the impact of partial substitution of dietary protein by Nigella sativa meal (NSM) and Sesame Seed Meal (SSM) on milk yield and composition, digestibility, some of blood parameters as well as economic efficiency. Sixteen lactating multiparous Egyptian buffaloes were used 8 weeks after calving. They were assigned into four groups (4 buffaloes each) to be fed on one of the four experimental rations, each ration consisted of 50% roughages plus 50% of the different concentrate feed mixtures differ in protein source, in 4x4 Latin square design. The experimental rations were as follow, R1: Traditional concentrate feed mixture plus Clover (C) plus Wheat Straw (WS), R2: Concentrate feed mixtures contained 50% NSM as protein source plus C plus WS, R3: Concentrate feed mixtures contained 50% SSM as protein source plus C plus WS and R4: Concentrate feed mixtures contained 25% NSM and 25% SSM as protein source plus C plus WS. No significant (p<0.05) differences among rations in the digestibility of DM, CF, NFE, NDF, cellulose and hemi-cellulose were observed, while, OM, CP, EE and ADF showed significant differences among rations. The 3rd ration recorded the highest TDN (61.79%) followed by control ration (56.61%) however R2 and R3 showed intermediate values. The highest 7% FCM was recorded with buffaloes fed R3 (11.01 kg h-1 day-1) followed by feeding R4, R1 and R2 being 10.56, 10.52 and 10.08 kg h-1 day-1, respectively. In general, the present results indicate that Nigella sativa meal and sesame meal were suitable for feeding lactating buffaloes and formulated balanced rations with adequate protein and energy which will be reflected on good health condition and normal performance of all lactating buffaloes.
  Wafaa M.A. Ghoneem and A.E.M. Mahmoud
  The present study aims to evaluate the effets of in-activated and dried yeast on Barki lambs. For that purpose thirty growing Barki male lambs (averaged 27 kg body weight, 9 months old) were divided into 3 groups (10 in each) according to live body weight for 90 days trial to study the effects of yeast supplementation on digestibility, growth performance, blood and rumen liquor parameters. The treatments contained 0 yeast (T1), 5 g h-1 day-1 either of inactivated yeast (T2) or dried yeast (T3). Results showed that the digestibilities of most nutrients and fiber fraction, nutritive value as TDN, total and average daily gain and feed conversion efficiency were improved by supplementation of inactivated yeast, followed by dried yeast compared to control. However, no differences (p<0.05) were observed in rumen pH and ammonia N. There were any adverse effects on blood parameters due to yeast supplementation. Based on this experiment, yeast supplementation (5 g h-1 day-1) especially with inactivated yeast could be recommended to improve growth performance of growing lambs.
  H.M. Ebeid , R.M.A. Gawad and A.E.M. Mahmoud
  The main objective of the current study is to evaluate tomato pomace silage as a source of roughage feed for lactating animals. Twenty lactating Egyptian buffaloes at the second/third season of lactation were used in the present study. The animals were randomly divided to two groups (ten buffaloes in each) using the complete random design. The animals were introduced to treatments starting on 70 DIM and continued for six weeks. The treatments were, control ration (R1) and it received a Corn Silage (CS) based ration supplemented with Concentrate Fed Mixture (CFM), Clover (C) and Rice Straw (RS) without Tomato Pomace Silage (TPS). The second ration (R2) was similar to the ration in first group with replacing clover by tomato pomace silage. The digestibility coefficients of dry matter, neutral and acid detergent fiber and nutritive values were increased (p<0.05) significantly with tomato pomace silage feeding. The protein and cellulose digestibility coefficients was negatively influenced (p<0.05) by tomato pomace feeding. The feeding of tomato pomace did not alter actual milk yield but it increased (p<0.05) 7% fat-corrected milk yield and milk fat percentage. Other milk composition percentages were not significantly affected. Feeding tomato pomace increased (p<0.05) proportions of polyunsaturated fatty acids, however, milk protein amino acid fraction was negatively affected in most cases. Inclusion of tomato pomace silage in the ration of lactating buffaloes improved feed utilization and economic efficiency compared to control ration. It was concluded that the nutritional value, feed conversion and economic efficiency of rations contained tomato pomace silage improved when used at rate 25% of ration without any adverse effect on performance of lactating buffaloes.
  N.E. El-Bordeny , A.A. Abedo , H.M. El-Sayed , E.N. Daoud , H.S. Soliman and A.E.M. Mahmoud
  This study aimed to evaluate effect of using exogenous fibrolytic enzymes on productive performance of dairy cows and milk curve response at different lactation stages. One hundred and sixteen multiparous cows were randomly assigned into two groups; fifty eight cows in each. Each group was contained 12 cows in early lactation 40±6 Days In Milk (DIM), 18 cows in mid lactation (122±4 DIM) and 29 cows in late lactation (216±2 DIM). The animals were fed total mixed ration with or without 15 g fibrolytic enzymes head–1 day–1 for five weeks. Adding fibrolytic enzymes to dairy cows ration caused a significant increase in serum total protein and glucose concentration compared to control group, while Albumin, globulin, ALT, AST, alkaline phosphates activity and total bilirubin and urea concentration were not affected. Insignificant differences were observed in feed intake as dry matter, total digestible nutrient, crude protein and net energy lactation between the two groups. Enzymes supplementation to dairy cows rations increased milk yield, 4% FCM and ECM as well as milk fat contents compared to control group, while insignificant increased protein, lactose, total solid and solid not fat contents. Feed conversions as well as nitrogen efficiency utilization were significantly improved for treated group compared to control. Fibrolytic enzyme supplementation to dairy cows ration slightly increased positive slope (b-value) at early lactation compared to control group and no significant difference at mid lactation was observed. While, significant decrease in negative b-value was noticed for cows fed ration supplemented with fibrolytic enzymes compared to control group. It could be concluded that fibrolytic enzymes supplementation to dairy cows ration at early, mid and lactation has the potential to improve its productive performance as well as it is affect milk curve response.
  Y.I. El-Talty , M.H. Abdel-Gwad and A.E.M. Mahmoud
  The present study aimed to evaluate the effect of common reed silage on the performance of growing lambs. Twenty Barki (33±0.57 kg) and 9 months old were divided into four equal groups in 90 days experimental period. The treatments were; (C) as a control group were animals fed clover hay plus Concentrate Feed Mixture (CFM), while, the experimental animals were fed (R1) reed (Phragmites australis) silage with molasses (RSM) plus CFM, R2) Reed Silage with Molasses and Formic acid (RSMF) plus CFM and (R3) Reed Silage with Molasses and Lactic acid bacteria (RSML) plus CFM. The chemical composition indicated that control ration was insignificantly little pitting lower in crude fiber and its constituents and higher in NFE comparing to the other rations. The digestibility coefficients (%) of nutrients (EE, CF, NDF, ADF, Cellulose and hemicellulose) were insignificantly different. On the other hand, DM, OM and CP digestibilities were significantly higher with R1 comparing to the control ration. There was no significant difference for nutritive value estimates of TDN, DCP, GE and DE among all tested rations. Similarly, the nitrogen balance was insignificantly differed among all treatments. Rumen pH of all treatments was significantly decreased at 3 h post feeding and then increased at 6 h post feeding. In contrary both ruminal ammonia nitrogen and total volatile fatty acids increased at 3 h post feeding and then decreased at 6 h post feeding. Blood metabolites of Albumin, Globulin and GOT were insignificantly differed for all tested rations, while total proteins and creatinine were significantly higher in R2 , urea significantly higher in control ration and GPT significantly higher with R1. In digestion trail, feed intake as DM and TDN was significantly higher in the control group, while DCP intake was insignificantly differed. Treatments feed conversion was insignificantly differed. It is concluded that reed silage was quite suitable as an alternative fodder for lambs growing with some minor additives that keep protein and energy on the demanded requirements.
  A.M. Abd El- Gawad , Y.I. El- Talty , K.M. Elsawy , A.E.M. Mahmoud and M.A. Rawash
  This study aimed to evaluate the effects of feeding lactating buffaloes on different dietary protein sources on amino acids profile of milk and milk urea nitrogen. Eight lactating Egyptian buffaloes in second lactation season weighed 730±32 kg in average were used after 8 weeks after calving, the animals arranged in three swing over design. Tested sources protein were Soybean Meal (SBM), Cotton Seed Meal (CSM) and Sunflower Meal (SFM). Rations differed in source of protein supplement: Ration one (R1) contained three meals, ration two (R2) contained soybean meal and cottonseed meal; ration three (R3) contained soybean meal and sunflower meal and ration four (R4) contained soybean meal alone. Result indicated that SBM had higher essential, non-essential amino acids values. Also, total Non-Essential Amino Acids (NEAA) were numerically higher for SBM (22.29) vs. CSM (20.46) and SFM (14.78). The ratio EAA/NEAA value in SFM (0.91) was higher than soybean meal (0.89) and cotton seed meal (0.81). Ration three had the highest in most of essential amino acids, non-essential amino acids and total EAA (30.39). Total NEAA value was the highest in R3 (33.52) compared with other rations. Ration one recorded the highest values in most of essential, non-essential amino acids and total EAA and ratio of EAA/NEAA in milk compared with other experimental rations. Whereas, R4 had the lowest ratio of EAA/NEAA in milk. Milk urea nitrogen was significantly lower with R1 (11.67) compared with R4 which recorded highest value (12.97) followed by R2 (12.78) and R3 (11.90). It could be concluded that feeding lactating buffaloes on more than one source of protein in its rations had a positive effect on amino acids profile in milk and decrease milk urea nitrogen (MUN) level.
  A.E.M. Mahmoud and H.M. El-Bana
  Metabolism trials were carried out using four mature males of Sudanese camels; Camelius dromedaries to evaluate the nutritive value of date stone (DS) and olive cake (OC), palm leaves (PL) and barley grains (BG) or their mixture. Results indicated that barley grains showed significantly (p<0.05) higher digestibility and nutritive value in all nutrients except for EE and ADF compared with either olive cake or date stone. In addition, DS showed better digestibility in all nutrients compared with OC except for EE digestibility. The ration contained BG plus DS recorded the highest digestibility for DM, OM, CP, CF and NFE. While, the ration contained BG plus OC recorded higher digestibility for NDF and ADF. No significant differences were detected in dry matter intake expressed as DMI g/W0.75 by camels fed different either tested feeds or rations. The water intake increased with animals fed DS being 8.42 L compared with BG and OC being 7.58 and 6.92 L, respectively. Also, results showed that animals consumed the ration contained BG plus DS recorded the highest water intake being 8.33 L. Feeding on BG led up to significant (p<0.05) decrease in pH values compared with other feeds after 3 and 5 h. No significant differences in ammonia nitrogen concentration at 5 h post feeding with all feeds. The BG plus DS mixture gave the lowest concentration of rumen ammonia content at the three times. While, BG with PL mixture showed the highest value of rumen ammonia content at the three times. It could be concluded that date stone and olive cake used to feed camel as substitution of barley grains without any adverse effect.
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