| This study first through the digestion and metabolism,growth and feeding experiments,select the appropriate animal growth performance of the Diets morphology,combined with the observation of feeding,rumination and mastication,it was evaluated whether pelleted could affect Diets fiber.Finally,through the development of rumen papilla comprehensive evaluation of granulation after the development of rumen papilla will have an impact,which provides a scientific basis for the application of whole mixed pelleted feed on goat.The study consists of the following five parts:1.Different levels peNDF pelleted feed on nutrients apparent digestibility of goatsIn this study,we studied the effects of Diets pelleted and powder on the apparent digestibility and nitrogen metabolism of goats under different peNDF levels.Select four weight was 25.00±0.12 kg of wave miscellaneous goat,use 4 x 4 Latin square design of experiment,four groups of experimental goat feeding four different diet.Diets A and Diets B were peNDF content of 22.75%of the powder,pellets.Diets C and Diets D were peNDF levels of 31.76%of the powder,pellets.Four sets of Diets neutral detergent fiber,protein,energy and other nutrients equal or close.The test is divided into four periods,each period of 15 days,of which pre-test period of 10 days,the official period of 5 days.The results show:1)At the low peNDF level,Diets B significantly increased the Diets acid detergent fiber(ADF),crude protein(CP),dry matter(DM),organic matter(OM),calcium(P<0.05).There was no significant difference in NDF between Diets A and Diets B(P>0.05).The results showed that there was no significant difference between the two groups(P>0.05).2)At the high peNDF level,Diets D significantly increased the Diets neutral detergent(NDF),acid detergent fiber(ADF),crude protein(CP),dry matter(DM),and dry matter(DM)at the high peNDF level,(P<0.05).There was no significant difference in the apparent digestibility of organic matter(OM),calcium(Ca)and phosphorus(P)between Diets C and Diets D(P<0.05),and the apparent digestibility and nitrogen retention(GE)(P>0.05).In this study,it was found that the diets were increased to increase the utilization of Diets nutrients and the biological value of nitrogen after high and low peNDF levels.2.Effects of different peNDF levels on the growth performance,digestibility and feeding behavior of goatsThe aim of this study was to investigate the effects of Diets pelleted on the growth performance,digestibility and behavior of goats under different peNDF levels.Select four weight was 25.00±0.15 kg of wave miscellaneous goat,use 4 x 4 Latin square design of experiment,four groups of experimental goat feeding four different diet.Diets A and Diets B were peNDF content of 22.75%of the powder,pellets.Diets C and Diets D were peNDF levels of 31.76%of the powder,pellets.Four sets of Diets neutral detergent fiber,protein,energy and other nutrients equal or close.The test is divided into four periods,each period of 15 days,of which pre-test period of 10 days,the official period of 5 days.The results show:1)At the low peNDF level,compared with diet A,Diets B significantly increased the daily feed intake,daily gain and apparent digestibility of nutrients(P<0.05),significantly shortened the time of feeding,chewing time,dry matter per kilogram(P<0.05),and the feed weight ratio of Diets B was significantly lower than that of Diets A(P<0.05).The time of feeding,ruminating time,chewing time and NDF feeding time,rumination time and chewing time;2)At the high peNDF level,Compared with Diets C,Diets D significantly increased the daily feed intake,daily gain and apparent digestibility of nutrients(P<0.05),significantly shortened the feeding time,chewing time,(P<0.05),and the feed weight ratio of Diets D was significantly lower than that of Diets C(P<0.05),and the time of feeding time,ruminant time,chewing time and NDF feeding time,rumination time and chewing time per kilogram).In this study,it was found that the Diets pelleted increased the daily feed intake,daily gain,feed conversion rate and apparent digestibility of nutrients,as well as reduced animal feeding and ruminant time.3.Effects of powder and pellets on rumen development of goatsThe aim of this study was to investigate the effects of different Diets patterns on rumen development of miscellaneous goats.Eight rounds of goats weighing 15.00 ± 0.15 kg were randomly divided into 2 treatment groups,each group of four were fed with neutral diets such as fiber,protein and energy,and diets of diets A and B respectively powder and pellets.The results showed that:1)Compared with Diets A,Diets B significantly increased the rumen and stomach weight of goat(P<0.05),but there was no significant difference in the proportion of rumen to stomach(P>0.05).2)Compared with diet A,Diets B significantly increased the width of ruminal papilla(P<0.05),but there was no significant difference between rumen papillary length and rumen wall thickness(P>0.05).The results of this experiment show that the diets can not only affect the healthy development of goat rumen,but also have the tendency to promote rumen width development.4.Effects of different pelleted size on nutrients apparent digestibility and nitrogen metabolism of goatsThis experiment chooses wave miscellaneous goat as the research object,the aim of this study was to investigate the effect of grain size on apparent nutrient digestibility and nitrogen metabolism in goats.Eighteen weeds with weight of 25.00±0.15 kg were randomly divided into 4 treatment groups,6 rats in each group.Three groups of test goats were fed with three different diets,respectively,feeding three different particle size and other nitrogen and other fiber diets.(Diets A:diameter 8 mm,length 2-3 cm;Diets B:diameter 6 mm,length 2-3 cm;Diets C:diameter 6 mm,length 5-6 cm).The test is divided into four periods,each period of 15 days,of which pre-test period of 10 days,the official period of 5 days.The results showed that:Compared with Diets A and Diets C,Diets B significantly improved the effects of neutral detergent fiber(NDF),acid detergent fiber(ADF),crude protein(CP),dry matter(DM),organic matter(OM),calcium(Ca),phosphorus(P)apparent digestibility and nitrogen biology(P<0.05).The results showed that the apparent digestibility of goat and the biological value of nitrogen could be improved when the diameter of the pellet was 6 mm and the length was 2-3 cm.5.Effects of different pelleted size on on growth performance,apparent digestibility and feeding behavior of goatsThis experiment chooses wave miscellaneous goat as the research object.The aim of this study was to investigate the effects of different particle sizes on the growth performance,nutrient digestibility and behavior of goats.Eighteen weeds with weight of 15.00±0.15 kg were randomly divided into 4 treatment groups,6 rats in each group.Three groups of test goats were fed with three different diets,respectively,feeding three different particle size and other nitrogen and other fiber diets.(Diets A:diameter 8 mm,length 2-3 cm;Diets B:diameter 6 mm,length 2-3 cm;Diets C:diameter 6 mm,length 5-6 cm).The results showed that:1)Diets A significantly increased feed conversion compared with Diets B and Diets C(P<0.05).2)Diets A significantly increased the nutrient digestibility of goats compared with Diets C(P<0.05).3)Diets A significantly prolonged feeding time and rumination time compared with Diets B and Diets C(P<0.05).The results showed that the pellet material had a significant increase in feed conversion rate when the diameter of the pellets was 8 mm in diameter and 2-3 cm in length when the diameter of the pellets was 6 mm in diameter and 2-3 cm in length.Extend the time of feeding and ruminant. |
PDF Full Text Request