發(fā)布時間：2018-06-19 20:11

  本文選題：甘肅高山細毛羊 + 泌乳量　； 參考：《西北農(nóng)林科技大學》2015年碩士論文

【摘要】：本試驗以25只二胎次甘肅高山細毛羊泌乳母羊和29只哺乳期羔羊為研究對象,準確測量甘肅高山細毛羊母羊2~75 d的泌乳量,同時對哺乳期羔羊1~75 d進行體重稱量,以期為舍飼半舍飼甘肅高山細毛羊母羊的飼養(yǎng)管理和羔羊的早期斷奶提供理論依據(jù)。本次研究內(nèi)容分為兩個試驗內(nèi)容:試驗一:甘肅高山細毛羊產(chǎn)后2~75 d泌乳規(guī)律研究本試驗為了系統(tǒng)描述母羊的泌乳規(guī)律,以25只甘肅高山細毛羊為研究對象,以羔羊哺乳前后的體重差作為母羊的泌乳量,在母羊產(chǎn)后的2~15 d、15~30 d、30~75 d分別對羔羊進行哺乳5次/d、4次/d、3次/d,以每一只母羊作為一個重復,在泌乳量準確測量的基礎上建立泌乳回歸曲線,再用Wood模型進行擬合。試驗結(jié)果表明:(1)甘肅高山細毛羊產(chǎn)后2~75 d平均總泌乳量為72.33±11.42 kg,平均日泌乳量為977.37±154.31 g。(2)甘肅高山細毛羊產(chǎn)后2~75 d泌乳曲線符合Wood模型。(3)10只產(chǎn)公羔母羊2~75 d泌乳量為76.95±11.02 kg,平均每天的泌乳量為1039.90±148.87 g。11只產(chǎn)母羔母羊2~75 d總泌乳量為68.12±10.52 kg,平均每天的泌乳量為920.53±142.17 g。結(jié)果表明羔羊性別對母羊泌乳量和泌乳曲線方程參數(shù)無顯著影響(P0.05)。(4)根據(jù)羔羊出生重進行分成兩組,體重較大組母羊(n=10)總泌乳量為74.169±13.431 kg,體重較小組母羊(n=11)總泌乳量為70.649±9.588 kg,體重較大組的母羊泌乳量比較小組高4.98%,但是羔羊出生重對甘肅高山細毛羊母羊的泌乳量和泌乳曲線方程參數(shù)無顯著影響(P0.05)。(5)甘肅高山細毛羊母羊泌乳曲線具有以下特點:泌乳初期上升速度快,泌乳高峰期出現(xiàn)較早且峰值較高,泌乳后期下降速度也比較快。(6)通過對甘肅高山細毛羊母羊泌乳曲線研究發(fā)現(xiàn),母羊在75 d時泌乳量比較低。試驗二:甘肅高山細毛羊哺乳期羔羊體重生長規(guī)律本試驗為了驗證羔羊早期斷奶的可能性,以29只1日齡甘肅高山細毛羊羔羊為研究對象,對羔羊在哺乳前后準確稱量體重,在此基礎上分別繪制羔羊生長的累積生長曲線、絕對生長曲線和相對生長曲線,來描述甘肅高山細毛羊羔羊的體重生長規(guī)律。試驗結(jié)果表明:(1)29只甘肅高山細毛羊羔羊的平均出生重為3.994±0.727 kg,75日齡體重為21.937±3.278 kg,75天內(nèi)共增重17.943 kg,平均日增重為249.3 g/d。(2)羔羊累積生長曲線呈近似直線變化,且羔羊體重增長量與母羊的泌乳量呈極強正相關(guān)(r=0.988)。(3)通過羔羊絕對生長曲線可以看出:羔羊出生后1~10日齡日增重快速增加,11~50日齡日增重平穩(wěn)上升,50~75日齡日增重波動下降。(4)通過羔羊相對生長曲線可以看出:羔羊出生后1~10日齡相對生長速度快速上升,10日齡達到最大值,10日齡之后開始迅速下降,30日齡之后下降速度趨于緩和。(5)根據(jù)甘肅高山細毛羊羔羊生長發(fā)育規(guī)律研究結(jié)果表明,羔羊?qū)嵭?5 d斷奶可行。綜上所述,甘肅高山細毛羊母羊在泌乳初期泌乳量迅速增加,泌乳高峰期出現(xiàn)較早且峰值較大,泌乳后期泌乳量下降速度也比較快,泌乳性能比較高。甘肅高山細毛羊羔羊累計生長曲線呈近似直線變化。研究表明了羔羊在75 d進行斷奶可行。
[Abstract]:In this experiment, 25 second Gansu Alpine Fine Wool Sheep lactation ewes and 29 lactation lambs were used to measure the milk secretion of the 2~75 D of the alpine fine wool sheep, and the weight of 1~75 D of the lactation lambs at the same time, in order to feed and manage the feeding and management of the ewes of Gansu Alpine Fine Wool Sheep and the early weanling of the lamb. The content of this study is divided into two experimental contents: Test 1: the test of 2~75 D lactation in Gansu Alpine fine wool sheep after postpartum study in order to systematically describe the law of lactation of the ewes, 25 Alpine fine wool sheep were taken as the research object, the weight difference before and after the lamb lactation was taken as the lactating amount of the ewes, and the 2~15 d after the ewes was 15, and 15 ~30 D, 30~75 D were lactating 5 times /d, 4 times /d, 3 /d, and each ewes were used as a repeat. On the basis of accurate measurement of milk secretion, the milk regression curve was established, and the Wood model was used to fit it. The results showed: (1) the average total lactation of Gansu Alpine fine wool sheep was 72.33 + 11.42 kg, and the average daily milk quantity was For 977.37 + 154.31 g. (2) Gansu Alpine fine wool sheep, the 2~75 D lactation curve accords with the Wood model. (3) the 2~75 D lactating amount of 10 male lambs is 76.95 + 11.02 kg, and the average milk volume per day is 1039.90 + 148.87 g.11, and the total milk volume of the female lamb is 68.12 + 10.52 kg, and the average daily milk volume is 920.53 + 142.17 g.. The sex of the lambs had no significant influence on the milk secretion and lactation curve equation parameters of the ewes (P0.05). (4) it was divided into two groups according to the birth weight of the lamb, and the total lactation of the large group of ewes (n=10) was 74.169 + 13.431 kg, and the body weight of the group ewe (n=11) was 70.649 + 9.588 kg, and the comparison group of the large body weight group was 4.98% higher than that of the group. But the birth weight of lamb has no significant influence on the milk secretion and lactation curve equation parameters of Gansu Alpine Fine Wool Sheep (P0.05). (5) the lactation curve of Gansu Alpine Fine Wool Sheep ewes has the following characteristics: the early stage of lactation is faster, the peak period of lactation appears earlier and the peak is higher, and the decline rate of the late lactation is also faster. (6) pass to Gansu The study of lactation curve of Alpine Fine Wool Sheep ewe found that the amount of lactation of the ewes at 75 D was lower. Test two: the body weight growth law of Gansu Alpine Fine Wool Sheep breastfeeding lamb in order to verify the possibility of early weaning, 29 1 day old Gansu Alpine fine wool sheep lambs were taken as the research object, and the lamb was accurately weighing body before and after lactation. On this basis, the cumulative growth curve of lamb growth, the absolute growth curve and the relative growth curve were drawn to describe the body weight growth of the Gansu Alpine fine wool sheep lambs. The experimental results showed that: (1) the average birth weight of 29 Gansu Alpine fine wool sheep lambs was 3.994 + 0.727 kg, 75 days old body weight was 21.937 + 3.278, and in 75 days. The cumulative growth curve of the average daily gain of 17.943 kg and the average daily gain of 249.3 g/d. (2) showed an approximate linear change, and the weight growth of the lamb had a strong positive correlation with the milk secretion of the ewes (r=0.988). (3) through the lamb absolute growth curve, it could be seen that the daily weight gain of the lamb increased rapidly after the birth of the lamb, and the daily weight gain of 11~50 was steadily rising, 50~75. (4) the relative growth curve of day age was reduced. (4) the relative growth curve of lambs showed that the relative growth rate of the lambs increased rapidly after birth and reached the maximum at 10 days of age. After 10 days of age, the growth rate began to decline rapidly. After 30 days of age, the decline rate tended to ease. (5) the results of the study on the growth and development of lambs in Gansu Alpine fine wool sheep showed that the growth and development of lambs in Gansu Alpine fine wool sheep showed that The 75 D weaning is feasible for the lamb. In summary, the amount of lactation in the early lactation period increases rapidly in the early lactation, the peak period of lactation appears earlier and the peak value is larger, the rate of lactation in the late lactation is also faster and the lactation performance is higher. The growth curve of the Gansu Alpine Fine Wool lamb is approximately linear. The lambs are weaned at 75 D.
【學位授予單位】：西北農(nóng)林科技大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：S826

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