饲料研究2024，Vol.47Issue(8)：21-26,6.DOI:10.13557/j.cnki.issn1002-2813.2024.08.004
新疆天山北坡两种草地类型放牧条件下多胎萨福克羊生产性能的对比分析
Comparative analysis of production performance of multiple Suffolk sheep under grazing conditions of two grassland types on the northern slope of Tianshan Mountains in Xinjiang
摘要
Abstract
The purpose of this experiment was to explore the monthly dynamic changes of yield and nutrient components of temperate desert-steppe type rangeland and temperate steppe-desert type rangeland on the northern slope of Tianshan Mountains in Xinjiang,and the effects of grazing on the weight changes of multiple Suffolk ewes and weaned lambs under the conditions of two grassland types.Suffolk postpartum ewes with a similar weight of two years old and 120 lambs after weaning were randomly divided into two groups.Each group had three repetitions,and each repetition had 20 sheep.Group A lambs and Group C ewes were grazed in temperate desert-steppe type rangeland experimental area(type Ⅰ grass group,namely Festucasulcata,feather grass and Seriphidium kaschgaricum),while Group B lambs and Group D ewes were grazed in temperate steppe-desert type rangeland experimental area(type Ⅱ grass group,namely Seriphidium borotalense Ling et Y.R.Ling,Kochia prostrata and Carex turkestanica).The trial period was 120 days.The results showed that in June and September,the fresh grass yield of type Ⅰ grass group was significantly higher than that of type Ⅱ grass group(P＜0.05).In September,the hay yield of type Ⅰ grass group was significantly higher than that of type Ⅱ grass group(P＜0.05).In June,the dry-fresh ratio of type Ⅰ grass group was significantly lower than that of type Ⅱ grass group(P＜0.05).In June and September,the crude ash content of type Ⅰ grass group was significantly lower than that of type Ⅱ grass group(P＜0.05).In July,the crude protein content of type Ⅰgrass group was significantly higher than that of type Ⅱ grass group(P＜0.05),and in September,the crude protein content of type Ⅰ grass group was significantly lower than that of type Ⅱ grass group(P＜0.05).The content of nitrogen-free extracts of type Ⅰ grass group in June was significantly higher than that in September(P＜0.05).In June,July and September,the phosphorus content of type Ⅱ grass group was significantly higher than that of type Ⅰ grass group(P＜0.05).There was no significant difference in total weight gain,average daily weight gain,and relative weight gain between the two grazing grassland types(P＞0.05).The weaned lamb weight increased continuously,and the litter size,litter weight,and weaned weight of ewes in the following year had no significant difference(P＞0.05).The results showed that with the increase of temperature and the decrease of precipitation,the forage yield of the two grazing grassland types decreased first and then increased,and the forage nutrition level decreased.The grazing adaptability and stress resistance of multiple Suffolk sheep were better under extreme environmental conditions.关键词
温性荒漠草原/温性草原化荒漠/绵羊/体重/繁殖性能Key words
temperate desert-steppe type rangeland/temperate steppe-desert type rangeland/sheep/weight/reproductive performance分类
农业科技引用本文复制引用
余乾,杨永林,杨华,张文喆..新疆天山北坡两种草地类型放牧条件下多胎萨福克羊生产性能的对比分析[J].饲料研究,2024,47(8):21-26,6.基金项目
国家重点研发计划子课题(项目编号:2021YFD1300903-2) （项目编号:2021YFD1300903-2）
"天山英才"培养计划 （）
兵团农业科技创新工程专项(项目编号:NCG202211) （项目编号:NCG202211）
"兵团英才"培养计划 （）
兵团科普发展专项(项目编号:2023CD004-01-3) （项目编号:2023CD004-01-3）
