In order to screen the Medicago sativa(alfalfa)varieties suitable for planting in Guangxi,six domestic and foreign heat-resistant alfalfa varieties,namely WL903,WL712,WL525HQ,59N59,Elite 9 and Longwei 6010,were select...In order to screen the Medicago sativa(alfalfa)varieties suitable for planting in Guangxi,six domestic and foreign heat-resistant alfalfa varieties,namely WL903,WL712,WL525HQ,59N59,Elite 9 and Longwei 6010,were selected and tested for growth performance,nutritional value and over-summer rate by the random block method.The results showed that the alfalfa varieties with better plant height and fresh grass yield were 59N59 and WL903,which showed the plant heights reaching 62.01 and 62.53 cm,respectively,and the fresh grass yields up to 40.93 and 38.38 t/hm 2,respectively,exhibiting extremely significant differences from the poorly performing Longwei 6010(P<0.01).The nutritional value of each tested variety was good,and the crude protein content was more than 20%.Among them,Elite 9 had a crude protein content as high as 28.43%.The over-summer rates of the six alfalfa varieties were all higher than 75%.It showed that the alfalfa varieties with fast growth,high yield,high nutritional value and high over-summer rate in this experimental area were 59N59 and WL903,which are suitable as the first varieties for planting in Guangxi.展开更多
[Objectives]The purpose of this experiment was to study the effects of dietary supplementation of Herba Picriae extract on the growth performance and immune organ index of Guangxi partridge chickens.[Methods]A total o...[Objectives]The purpose of this experiment was to study the effects of dietary supplementation of Herba Picriae extract on the growth performance and immune organ index of Guangxi partridge chickens.[Methods]A total of 500 one-day-old Guangxi partridge chickens were selected and randomly divided into five groups,five replicates for each group and 20 chickens for each replicate.Groups A,B and C were treatment groups,in which 0.70%,0.35%and 0.175%of Herba Picriae extract was added to the basal diet,respectively.Group D was a positive drug control group,in which 0.01%colistin sulfate premix was supplemented.Group E was a blank control group,in which the chickens were fed the basal diet.The experimental period was 105 d.During the experiment,five chickens were randomly selected from each group on days 21,35 and 49,respectively for the measurement of immune organ index.[Results]When the chickens were fed basal diet supplemented with 0.175%of Herba Picriae extract,their daily body weight gain increased significantly from day 22 to day 35 and from day 71 to day 105 and tended to increase from day 1 to day 21,from day 36 to day 49,and from day 50 to day 70,with a range of 7.37%-8.72%.Dietary supplementation of 0.70%and 0.175%of Herba Picriae extract significantly promoted the growth and development of Fabricius bursae in the experimental chickens.[Conclusions]Dietary supplementation of 0.175%of Herba Picriae extract improved the growth performance and feed intake,as well as 21-d-old bursal index of the experimental chickens.展开更多
基金Supported by the Special Fund for the Development of Local Science and Technology Guided by Central Government(YDZX20174500004910,ZY18076011)the Key Research&Development of Guangxi Zhuang Autonomous Region(GKG15248003-21)the Guangxi Science and Technology Base and Specialized Talents(GKAD16450015).
文摘In order to screen the Medicago sativa(alfalfa)varieties suitable for planting in Guangxi,six domestic and foreign heat-resistant alfalfa varieties,namely WL903,WL712,WL525HQ,59N59,Elite 9 and Longwei 6010,were selected and tested for growth performance,nutritional value and over-summer rate by the random block method.The results showed that the alfalfa varieties with better plant height and fresh grass yield were 59N59 and WL903,which showed the plant heights reaching 62.01 and 62.53 cm,respectively,and the fresh grass yields up to 40.93 and 38.38 t/hm 2,respectively,exhibiting extremely significant differences from the poorly performing Longwei 6010(P<0.01).The nutritional value of each tested variety was good,and the crude protein content was more than 20%.Among them,Elite 9 had a crude protein content as high as 28.43%.The over-summer rates of the six alfalfa varieties were all higher than 75%.It showed that the alfalfa varieties with fast growth,high yield,high nutritional value and high over-summer rate in this experimental area were 59N59 and WL903,which are suitable as the first varieties for planting in Guangxi.
基金Science and Technology Major Project of Guangxi Zhuang Autonomous Region(Gui Ke AA17204052)Fundamental Research Fund for Public-welfare Scientific Research Institutions Directly under Guangxi Zhuang Autonomous Region(Gui Mu Yan Ke 2019-9)+1 种基金Guangxi Innovation Team Construction Project of National Modern Agricultural Industry Technology System(nycytxgxcxtd-19)Guangxi Science and Technology Base Special Project(20182023-1).
文摘[Objectives]The purpose of this experiment was to study the effects of dietary supplementation of Herba Picriae extract on the growth performance and immune organ index of Guangxi partridge chickens.[Methods]A total of 500 one-day-old Guangxi partridge chickens were selected and randomly divided into five groups,five replicates for each group and 20 chickens for each replicate.Groups A,B and C were treatment groups,in which 0.70%,0.35%and 0.175%of Herba Picriae extract was added to the basal diet,respectively.Group D was a positive drug control group,in which 0.01%colistin sulfate premix was supplemented.Group E was a blank control group,in which the chickens were fed the basal diet.The experimental period was 105 d.During the experiment,five chickens were randomly selected from each group on days 21,35 and 49,respectively for the measurement of immune organ index.[Results]When the chickens were fed basal diet supplemented with 0.175%of Herba Picriae extract,their daily body weight gain increased significantly from day 22 to day 35 and from day 71 to day 105 and tended to increase from day 1 to day 21,from day 36 to day 49,and from day 50 to day 70,with a range of 7.37%-8.72%.Dietary supplementation of 0.70%and 0.175%of Herba Picriae extract significantly promoted the growth and development of Fabricius bursae in the experimental chickens.[Conclusions]Dietary supplementation of 0.175%of Herba Picriae extract improved the growth performance and feed intake,as well as 21-d-old bursal index of the experimental chickens.
