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Fifteen lactating Zaraibi does were assigned to study the effect of EM ability to prevent the probably toxicology effect of the residues of pesticides remained in tomato haulms (TH). Animals were fed ad libitum fresh TH (T1), TH silage (T2) and TH silage treated with EM (T3) and concentrate feed mixture (CFM). Treatment with EM (T3) was resulted in less concentrations of pesticides residues compared to T1 and T2. Higher milk yield, milk composition and 4% FCM were followed EM treatment; T1 had less milk fat content than T2 and T3. All pesticides concentrations residues in milk were higher in T1, but it had less degree in T2 and not detected for T3 Treatment TH with EM (T3) had higher concentrations of TVFA's, acetate, gas production, total count of cellulosic bacteria and less protozoa. T1 had higher concentrations of cholesterol, triglyceride, urea, creatinine, AST, ALT and less glucose, albumin and globulin than those for T2 and T3. So, biological (EM) treatment could be advisable to overcome the harmful effect of feeding TH exposure to pesticides. [ABSTRACT FROM AUTHOR]

ABSTRACT Fruit by‐products are a sustainable and cost‐effective alternative to traditional grain feed for livestock. One of the most important by‐products is mango seed kernel (MSK), which can be used as a valuable energy source for feeding growing calves in the tropical and subtropical productive regions of the world. This study investigated the effect of replacing corn grains (CGs) with MSK on intake, nutrient digestibility, blood metabolites and rumen parameters. Eighteen growing male Friesian calves (200 ± 6.55 kg of body weight and 9–11 months old) were randomly assigned to three treatment groups. Three concentrate feed mixtures were formulated such that MSK replaced CG at 0%, 25% and 50%. Dry matter intake was unaffected, whereas dry matter, organic matter and fibre digestibility increased linearly (p < 0.05) with increased inclusion of MSK. Ruminal pH (p = 0.053) and total volatile fatty acid (VFA) concentration (p = 0.041) increased linearly. There was a linear decrease in cholesterol (p = 0.029) and AST (p = 0.028) levels in the blood of calves. In conclusion, this study demonstrated the positive effect of replacing 50% of CG with MSK on rumen parameters, including a higher ruminal pH and total VFA concentration, alongside higher nutrient digestibility. The dietary inclusion of mango seed can serve as a valuable and sustainable dietary component for growing calves. [ABSTRACT FROM AUTHOR]