本文選題：能量需要 + 產(chǎn)熱量　； 參考：《南京農(nóng)業(yè)大學(xué)》2015年碩士論文

【摘要】：皖東牛是安徽省地方優(yōu)良品種,在當(dāng)?shù)仫曫B(yǎng)歷史悠久。因其耐粗飼,抗病力強(qiáng),役用性能好,屠宰率高,逐漸受到人們的重視。本文旨在對(duì)皖東牛生長(zhǎng)期能量需要進(jìn)行探究,研究了不同日糧能量水平對(duì)日增重的影響,皖東牛生長(zhǎng)期的維持凈能需要量,不同能量采食水平對(duì)產(chǎn)熱量的影響,凈能需要量。1不同日糧能量水平對(duì)皖東牛生長(zhǎng)期日增重的影響本研究選擇13頭體況良好、體重相近(295.97±30.52)kg的生長(zhǎng)期皖東牛公牛,通過(guò)飼養(yǎng)試驗(yàn),研究不同日糧能量水平對(duì)生長(zhǎng)期皖東牛日增重的影響及生長(zhǎng)期皖東牛能量維持需要量。采用單因素隨機(jī)試驗(yàn)設(shè)計(jì),按照日糧不同總能采食水平設(shè)三個(gè)處理,依次為 T1(92.03MJ/d)、T2(68.77MJ/d)和 T3(45.53MJ/d)。測(cè)定了生長(zhǎng)期皖東牛的總增重、日增重。研究結(jié)果表明:三個(gè)處理皖東牛平均日增重差異極顯著,單位代謝體重總能攝入(GE,kJ/kg0.75·d)與日增重(△W,kg/d)的關(guān)系式為:GE(kJ/kg0.75.d)=353.87△W+942.70(P0.01,r=0.82)。AW為日增重,當(dāng)△W=0時(shí),維持需要下總能需要量為 942.70kJ/kg0.75.d,每增重 1kg,需要增重總能 353.87 kJ/kg0.75·d。2皖東牛生長(zhǎng)期絕食代謝研究通過(guò)研究皖東牛生長(zhǎng)期絕食產(chǎn)熱量來(lái)推算其維持凈能需要量。選取健康無(wú)病、體重(315.6±45.8)kg的皖東牛公牛3頭進(jìn)行絕食代謝試驗(yàn),用較低水平(干草2kg/d,精料0.5kg/d)飼喂一周后開(kāi)始絕食,自由飲水。從絕食第4天起連續(xù)3天采用呼吸代謝頭箱測(cè)定試驗(yàn)牛在站立狀態(tài)下的畜體產(chǎn)熱量,測(cè)定始末稱(chēng)重,取其平均值作為絕食體重。結(jié)果表明,生長(zhǎng)期皖東牛絕食代謝產(chǎn)熱(FHP)為356.26 kJ/kg0.75-d,根據(jù)NEm=120%FHP估測(cè)得出,生長(zhǎng)期皖東牛維持凈能需要量為427.51 kJ/kg0.75.d。3皖東牛生長(zhǎng)期凈能需要量的研究本試驗(yàn)為了探究皖東牛生長(zhǎng)期凈能需要量。選擇7頭體況良好,體重相近的生長(zhǎng)期皖東牛,試驗(yàn)分為三期不同能量水平飼喂,每期15天,三期日糧能量水平分別為T(mén)1(92.03MJ/d)、T2(68.77MJ/d)和 T3(45.53MJ/d),通過(guò)三期不同能量梯度的飼喂,測(cè)量試驗(yàn)牛體重變化和代謝產(chǎn)熱。研究結(jié)果表明,生長(zhǎng)期皖東�？偰艿絻裟艿霓D(zhuǎn)化效率為44.66%,維持凈能需要量為420.97 kJ/kg0.75.d,產(chǎn)熱量(HP,kJ/kg0.75.d)與日增重(AW,kg/d)之間的線(xiàn)性回歸關(guān)系為 HP(kJ/kg0.75.d)=81.535△W+420.97,(P0.01,r=0.78),生長(zhǎng)期皖東牛凈能需要量為 NE(kJ/kg0.75·d)= 158.04△W+420.97,每公斤增重需要生長(zhǎng)凈能158.04 kJ/kg0.75-d。
[Abstract]:East Anhui cattle is an excellent local breed in Anhui Province, and has a long history in local breeding. People pay more and more attention to it because of its strong resistance to disease, good performance in service and high slaughter rate. The purpose of this study was to investigate the energy needs of Anhui East Anhui cattle during the growth period, and to study the effects of different dietary energy levels on daily gain, the net energy requirement of the growth period and the effects of different energy intake levels on the energy production. Effects of different dietary energy levels on daily gain of Wandong cattle in growing period, 13 bulls with good body condition and similar body weight (295.97 鹵30.52) kg were selected in this study. The effects of different dietary energy levels on the daily gain of Anhui East Anhui cattle and the energy maintenance requirements of the growing Anhui cattle were studied. The single factor random trial design was used. According to the different dietary total energy intake levels, three treatments were set up, T1 (92.03 MJ / d) and T2 (68.77 MJ / d) and T3 (45.53 MJ / d) respectively. The total weight gain and daily gain of Anhui east cattle in growing period were measured. The results showed that the average daily gain of the three treatments was significantly different. The relationship between the total metabolic body weight intake (GEK J / kg 0.75 d) and daily gain (WN kg / d) was as follows: 1. GE (KJ / kg0.75.d) / 353.87 W 942.70 (P0.01 / kg 0.82) .AW = 0, respectively. The total energy requirement was 942.70kJ / kg 0.75.dunder the requirement of maintenance, the total energy gain of 353.87 kJ / kg 0.75d.2 for every 1 kg gain was calculated by studying the calorie requirement of the growth period of Anhui East Anhui cattle. Three healthy and disease-free Wandong bulls with body weight of (315.6 鹵45.8kg) kg were selected for a hunger strike metabolism test, and fed with a lower level (2 kg / d of hay, concentrate 0.5kg/d) for one week after hunger strike and drinking free water. From the 4th day of hunger strike, the body heat production of the cattle in standing state was measured by respiratory metabolism headbox for 3 consecutive days, the weight was measured and the average value was taken as the hunger strike body weight. The results showed that the fasting metabolic heat production (FHP) of Anhui East Anhui cattle was 356.26 kJ / kg 0.75-d during the growing period. A study on the net energy requirement of Anhui East Anhui cattle during the growth period was 427.51 KJ / kg 0.75.d.3 in order to explore the net energy requirement of Anhui East Anhui cattle during the growing period. In this experiment, 7 heads of Wandong cattle with good body condition and similar body weight were divided into three periods of different energy levels, 15 days each, and the dietary energy levels in three periods were T1 (92.03 MJ / d) and T2 (68.77 MJ / d) and T3 (45.53 MJ / d), respectively, and fed with three stages of different energy gradients. Body weight and metabolic heat production were measured. The results show that The conversion efficiency of total energy to net energy of East Anhui cattle was 44.66, the net energy requirement of maintenance was 420.97 KJ / kg 0.75.d, the linear regression relationship between HPJ / kg0.75.d and daily gain was HP (KJ / kg0.75.d) 81.535W 420.97, (P0.01hrc0.78), and the net energy requirement was NE (kJkg0.75d) = 158.04 W420.97. The net energy of growth per kilogram weight gain is 158.04 kJ / kg 0.75-d.
【學(xué)位授予單位】：南京農(nóng)業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類(lèi)號(hào)】：S823

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