本文選題：鈷 + 獺兔　； 參考：《動物營養(yǎng)學(xué)報》2017年03期

【摘要】：本試驗旨在研究飼糧鈷添加水平對斷奶至3月齡獺兔飼糧營養(yǎng)物質(zhì)表觀消化率、氮代謝、胰腺消化酶活性、血清生化指標(biāo)和鈷代謝的影響。選擇體重相近的斷奶獺兔200只,隨機分為5組,每組40個重復(fù),每個重復(fù)1只試驗兔。5組試驗兔分別飼喂在基礎(chǔ)飼糧中添加0(對照)、0.1、0.4、1.6、6.4 mg/kg鈷(以硫酸鈷的形式)的試驗飼糧,經(jīng)7 d預(yù)飼后進(jìn)行為期53 d的飼養(yǎng)試驗。結(jié)果顯示:飼糧鈷添加水平對飼糧中各營養(yǎng)物質(zhì)的表觀消化率均沒有顯著影響(P0.05),但飼糧干物質(zhì)(DM)、粗蛋白質(zhì)(CP)和鈷的表觀消化率隨飼糧鈷添加水平的升高均有先升高后降低的趨勢,DM和CP的表觀消化率在鈷添加水平為1.6 mg/kg時最高,鈷的表觀消化率在鈷添加水平為0.4 mg/kg時最高。飼糧鈷添加水平對糞氮(FN)、可消化氮(DN)、氮表觀消化率(NAD)、氮生物學(xué)效價(NBV)均無顯著影響(P0.05),對食入氮(IN)、尿氮(UN)、氮沉積(RN)、氮利用率(NUR)有顯著影響(P0.05)。隨著飼糧鈷添加水平的升高,IN、RN和NUR均先降低后升高再降低,并均在鈷添加水平為1.6 mg/kg時最高,而UN則逐漸降低。飼糧鈷添加水平對胰腺胰蛋白酶活性有顯著影響(P0.05),且在鈷添加水平為1.6 mg/kg時最高。飼糧鈷添加水平對血清尿素含量有顯著影響(P0.05),隨著飼糧鈷添加水平的升高,血清尿素含量先降低后升高,在鈷添加水平為1.6 mg/kg時最低。飼糧鈷添加水平對血清總蛋白和白蛋白含量無顯著影響(P0.05)。飼糧鈷添加水平對糞、尿、肌肉、脾臟和腎臟中鈷含量有顯著影響(P0.05),且隨著飼糧鈷添加水平的升高,糞、尿、肌肉、脾臟和腎臟中鈷含量均持續(xù)增加。綜合本試驗測定指標(biāo),斷奶至3月齡獺兔飼糧鈷適宜添加水平為0.4~1.6 mg/kg(飼糧中鈷含量實測值為0.60~1.83 mg/kg)。
[Abstract]:The purpose of this study was to study the effects of dietary supplementation of cobalt on the apparent digestibility, nitrogen metabolism, pancreatic digestive enzyme activity, serum biochemical indexes and cobalt metabolism in the diet of weaning to 3 month old Rex rabbits. 200 weanling rabbits with similar weight were randomly divided into 5 groups, each of 40 reduplicated rabbits and each repeat 1 Experimental Rabbit.5 rabbits were fed respectively. Adding 0 (control) to the basal diet, 0.1,0.4,1.6,6.4 mg/kg cobalt (in the form of cobalt sulphate) and pre feeding 7 d for a 53 D feeding test. The results showed that the apparent digestibility of the nutrients in the diet was not significantly affected by the dietary cobalt addition level (P0.05), but the dietary dry matter (DM), crude protein (CP) and cobalt The apparent digestibility of DM and CP increased first and then decreased. The apparent digestibility of DM and CP was the highest when the cobalt addition level was 1.6, and the apparent digestibility of cobalt was the highest when the cobalt addition level was 0.4 mg/kg. The dietary cobalt addition level to the fecal nitrogen (FN), the digestible nitrogen (DN), the nitrogen apparent digestibility (NAD), and nitrogen biology The titer (NBV) had no significant effect (P0.05) on the intake of nitrogen (IN), urine nitrogen (UN), nitrogen deposition (RN) and nitrogen utilization (NUR). With the increase of dietary cobalt addition level, IN, RN and NUR first decreased and then decreased, and both were the highest when cobalt addition level was 1.6 mg/kg, while UN was gradually reduced. The activity of protease has a significant effect (P0.05) and the highest in the addition level of cobalt (1.6 mg/kg). The dietary cobalt addition level has a significant effect on the serum urea content (P0.05). With the increase of the dietary cobalt addition level, the serum urea content decreases first and then increases, the lowest in the cobalt addition level is 1.6 mg/kg. The dietary cobalt addition level to the serum total protein There was no significant effect on the content of albumin (P0.05). Cobalt content in feces, urine, muscles, spleen and kidney was significantly affected by dietary cobalt addition level (P0.05), and cobalt content in feces, urine, muscles, spleen and kidneys increased with the increase of dietary cobalt levels. Synthesis of cobalt in 3 month old Rex rabbits was suitable for addition of cobalt content in the manure, urine, muscles, spleen and kidney. The level was 0.4~1.6 mg/kg (the measured value of cobalt in the diet was 0.60~1.83 mg/kg).

【作者單位】： 山東農(nóng)業(yè)大學(xué)動物科技學(xué)院;山東省農(nóng)科院畜牧獸醫(yī)研究所;
【基金】：中國博士后科學(xué)基金(2015M58061) 山東農(nóng)業(yè)大學(xué)博士后科學(xué)基金(2015—2017);山東農(nóng)業(yè)大學(xué)青年科技創(chuàng)新基金項目(2015—2016) 山東省現(xiàn)代農(nóng)業(yè)產(chǎn)業(yè)技術(shù)體系特種經(jīng)濟動物創(chuàng)新團(tuán)隊(SDAIT-21-12) 現(xiàn)代農(nóng)業(yè)產(chǎn)業(yè)技術(shù)體系建設(shè)專項(CARS-44-B-1) 山東省農(nóng)業(yè)重大應(yīng)用技術(shù)創(chuàng)新課題(肉、獺兔高效高產(chǎn)技術(shù)研究、集成與推廣)
【分類號】：S829.1
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本文編號：1782933