草食家畜Issue(4)：48-56,9.DOI:10.16863/j.cnki.1003-6377.2026.04.007
西藏高寒牧区土壤理化性质与季节变化对牧草营养的动态影响规律及白绒山羊对冬季牧草营养成分的表观消化率研究
Dynamic Effects of Soil Physicochemical Properties and Seasonal Changes on Forage Nutrition in Xizang Alpine Pastoral Regions and Apparent Digestibility of Winter Forage Nutrients of White Cashmere Goats
摘要
Abstract
[Objective]The study aimed to investigate the seasonal dynamics of soil physicochemical properties and forage nutrition in the alpine pastoral region of Xizang and to clarify the apparent digestion characteristics of white cashmere goats for autumn and winter forages.[Methods]Taking Rutog County of Ngari Prefecture as the experimental location,and the dominant forages and soils from summer-autumn pastures and winter-spring pastures as the research subjects,a diagonal five-point sampling method was used for sampling of forages and soils.Then soil physicochemical properties in the two seasonal pastures,nutrient components of forages in four seasons were measured,and the apparent nutrient digestibility of white cashmere goats for autumn and winter forages was determined using total fecal collection method.[Results]The soil in the experimental pastures was alkaline,with pH values ranging from 8.69 to 8.86.The organic carbon content in summer-autumn pastures was significantly higher than that in winter-spring pastures(P＜0.05).The contents of total nitrogen,available phosphorus,and available potassium were all higher in summer-autumn pastures than in winter-spring pastures.Forage nutrient indices showed significant seasonal differences.Specifically,the dry matter content was highest in autumn,reaching 95.51%±1.67%;crude protein content peaked in summer at 17.69%±2.23%and dropped to the lowest in winter at 3.52%±0.62%;crude fat content was highest in spring at 5.70%±0.47%;calcium content generally showed an increasing trend,while phosphorus content decreased sharply by 83%in autumn and winter.White cashmere goats had the highest digestibility of crude fiber in autumn and winter forages at 74.06%±16.00%,but the lowest digestibility of crude protein and phosphorus at 37.66%±8.09%and 38.63%±18.20%,respectively.[Conclusion]Forage nutrition was jointly affected by soil physicochemical properties and seasonal changes.Summer forages had the best nutritional value,while forage nutrient level significantly declined in winter and spring.During the autumn-winter withered grass period,white cashmere goats had insufficient access to crude protein and phosphorus.In production,targeted supplementation should be carried out based on forage nutrient deficiencies to ensure the healthy growth of livestock.关键词
高寒草甸/土壤养分/季节变化/牧草营养成分/白绒山羊/表观消化率Key words
alpine meadow/soil nutrients/seasonal change/forage nutritional composition/White Cashmere Goat/apparent digestibility分类
农业科技引用本文复制引用
阿骄阳,郭云霞,刘月琴,王红娜,段泽鹏,吴晓龙,刘洁,西热多吉,达娃卓玛,旦追索朗,索朗达,吴玉江..西藏高寒牧区土壤理化性质与季节变化对牧草营养的动态影响规律及白绒山羊对冬季牧草营养成分的表观消化率研究[J].草食家畜,2026,(4):48-56,9.基金项目
中央引导地方科技发展资金项目(246Z6602G) （246Z6602G）
国家绒毛用羊产业技术体系项目(CARS-39-23) （CARS-39-23）
国家现代农业产业技术体系资助项目(CARS-39-32) （CARS-39-32）
