کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5538799 1552355 2017 44 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effectiveness of calcium oxide and autoclaving for the detoxification of castor seed meal in finishing diets for lambs
ترجمه فارسی عنوان
اثربخشی اکسید کلسیم و اتوکلاوین برای سم زدایی از وعده های بذر کاستور در تکمیل جیره های بره
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک علوم دامی و جانورشناسی
چکیده انگلیسی
This study aimed to evaluate the efficiency of a detoxification process (calcium oxide (CaO) levels × different autoclaving times) on castor seed meal and to test the effects of diets incorporating detoxified castor seed meal on the performance, digestibility, ingestive behavior, blood concentrations, carcass weight, and in vitro gas production in lambs. Changes in detoxification capacity through the interaction of autoclaving time and the amount of CaO were evaluated by an experiment with a non-detoxified castor seed meal and a 4 × 2 factorial design with four levels of CaO (10, 20, 30 and 40 g/kg) and two autoclaving times (15 and 30 min at 15 psi and 121 °C), with five replicates per treatment. The treatment of castor seed meal with 10 g of CaO/kg and 30 min of autoclaving promoted the disappearance of the bands that represent the ricin subunits of castor seed meal, and this was the most efficient method because it used less CaO. Therefore, this method was used to detoxify the castor seed meal used for the formulation of the experimental diets. Forty crossbred male sheep, with an average weight of 25 ± 3.0 kg, were used in a completely randomized design with four treatments and ten replicates. The diets consisted of 0, 100, 200 and 300 g/kg castor seed meal inclusion (dry matter (DM) basis). The inclusion of up to 300 g/kg castor seed meal in the lamb diets did not affect the daily intake of DM and crude protein (CP), which averaged 1194 and 191 g/day, respectively. However, due to the chemical composition of the castor seed meal, the intake of ether extract and neutral detergent fiber (NDFan) was increased by approximately 110 g/day, while the intake of non-fibrous carbohydrates (NFC) was reduced by 95 g/kg. A linear decrease was observed in the digestibility of the DM and NDFan with the inclusion of detoxified castor seed meal. However, the digestibility coefficients of CP and EE did not change. The castor seed meal increased intake and reduced idling times. The performance data of lambs fed diets containing different levels of castor seed meal showed a decreasing linear trend in the final body weight gain and average daily gain, but the concentrations of the hepatic enzymes GGT, AST and ALT were not affected. The use of 10 g/kg CaO with 30 min of autoclaving led to the complete detoxification of the castor seed meal. Thus, the inclusion of detoxified castor seed meal in lambs' diet, at 200 g/kg, is recommended because it increased performance growth and feed efficiency and did not cause toxicity.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Animal Feed Science and Technology - Volume 231, September 2017, Pages 76-88
نویسندگان
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