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Articles by Taghi Ghoorchi
Total Records ( 3 ) for Taghi Ghoorchi
  Mohammad Nasehi , Nor Mohammad Torbatinejad , Morteza Rezaie and Taghi Ghoorchi
  Background and Objective: Efficient use of available unconventional feeds and co-products is very important in developing countries. Therefore, the present study aimed to investigate the chemical composition, in vitro gas production (GP), methane production (CH4), dry matter digestibility, organic matter digestibility (OMD), metabolizable energy (ME), net energy lactation (NEL) and short-chain fatty acid (SCFA) of green tea waste (GTW), black tea waste (BTW) and alfalfa hay in presence or absence of polyethylene glycol (PEG). Materials and Methods: The amount of dry matter digestibility, OMD, ME, NEL, SCFA and CH4 in experimental treatment was determined by in vitro gas production technique. Rumen fluid samples were collected from three Taleshi cows (live weight 335±2.5 kg) before the morning meal. Chemical composition data was analyzed by general linear models, using a completely randomized design (CRD); the means were compared with Duncan’s test (p<0.05) procedures in SAS (version 9.1). Gas production, CH4, dry matter digestibility, OMD, ME, NEL and SCFA data were analyzed by general linear models, using a completely randomized design in a 2×3 factorial arrangement. The means were compared with Tukey’s test (p<0.05) procedures in SAS (version 9.1). Results: The amount of phosphorus was not significantly affected by treatments but other chemical composition showed a wide variation (p<0.05) between treatments. The use of PEG increased (p<0.05) GP from GTW and BTW in all incubation times. The PEG significantly increased (p<0.05) the volume of GP from soluble fraction (a) The volume of GP from insoluble but fermentable fraction and (b) GP potential (a+b) in GTW and BTW. The CH4 production significantly increased in BTW by PEG (p<0.05). The amount of dry matter digestibility, OMD, ME, NEL and SCFA in GTW and BTW significantly increased by using PEG (p<0.05). Conclusion: The results of this study indicated that adding PEG to GTW and BTW can improve their nutritive value and could be considered as a potential feed for ruminants.
  Noutmohammad Torbatinejad , Serollah Galeshi and Taghi Ghoorchi
  An experiment was conducted at the Agricultural Research Station of Eraghi Mahalleh, Gorgan, in Northern Iran. The aim of the experiment was to measure the nutritional value of foxtail millet forage grown in Northern Iran with different sowing dates and at different densities. Foxtail millet (Setaria italica L.) was cultivated under different conditions of sowing date and plant density, using a factorial arrangement in a randomized completely design with 6 replications. The sowing dates as as first factor were July 1, 16 or 31, the plant densities as a second factor were 30, 45 or 60 plants m-2. The results showed that the sowing date and plant density had a significant effect on the content of NDF and ADF (p<0.05). When the various treatments were compared, the forage produced from millet grown with a sowing date of July 16 and a density of 30 plants m-2 contained the greatest amount of protein (119.3 g kg-1). The highest ash content (100 g kg-1) was obtained from plants grown with a sowing date of July 1 and a density of 45 plants m-2. The sowing date, the density and the interaction of these two factors did not have a significant effect on Ca and or P content of millet forage (p<0.05). The DMD of millet forage from different treatments varied between 418 and 589 g kg-1. Similarly, the Digestible Energy (DE) varied between 7.5 and 10.5 and the Metabolizable Energy (ME) between 6.0 and 8.7 MJ kg-1. The highest rate of rumen gas production was related to an incubation time of 12 h (46.8-58.8 mL/200 g DM). A sowing date of July 1 and a density of 60 plants m-2 are recommended to produce foxtail millet with optimal characteristics for animal nutrition in the climatic conditions of the Gorgan-Golestan province in Northern Iran. This is because these conditions led to the greatest production of dry matter and an optimal chemical composition (especially, with regard to the protein content).
  Behnam Ghorbani , Taghi Ghoorchi , Hamid Amanlou and Saeed Zerehdaran
  Twenty-four Holstein dairy cows were used to evaluate the singular and combined effects of different level of crude protein and monensin treatments during the early lactation on digestion and milk yield of dairy cows. The experiment was designed as completely randomized with a 3x2 factorial arrangement of treatments. The factors were three Concentrations of CP supplement (19.5, 21.4 and 23.4% of dry matter) and two levels of monensin (0 and 350 mg per cow per day). This experiment consist of three periods and each period was 3 week in length. Monensin did not affect DMI, milk yield, lactose and SNF but it reduced milk fat and protein percentage. Monensin premix significantly decreased rumen ammonia but rumen pH and microbial protein synthesis was not affected by monensin treatment. Although, Monensin treatment increased apparent digestibility of DM, NDF, ADF, CP, but they were not significantly. Increasing dietary CP, improved milk and protein production, but did not alter the other components of milk. Digestibility of NDF, ADF, CP were improved by increasing dietary CP. Increasing diet CP from 19.5 to 21.4% did not significantly increase ruminal ammonia, but increasing to 23.4% have significant effect on it. There was a linear relationship between level of crud protein in the diet and urine volume excretion. Microbial protein synthesis was affected by increasing CP level; on this way maximum protein synthesis was achieved in 21.4% CP.
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