摘要
采集不同海拔的高寒草甸、山地草甸、山地草甸草原、山地草原、山地荒漠草原及平原低地草甸上的混合牧草,进行风干和烘干处理后测定含水量,计算干鲜比。结果表明,不同海拔的山地草地的牧草干鲜比差异较大,牧草含水量呈现从高海拔高寒草甸到低海拔山地荒漠草原逐渐降低的趋势;同一山地草地类型(山地草甸)牧草干鲜比也存在一定差异;平原低地草甸与山地垂直带中部的牧草干鲜比差异均不显著(P>0.05),但与垂直地两端的牧草干鲜比差异显著(P<0.05);不同草地类型的牧草风干干鲜比较烘干干鲜比高出了5%~32%。分析认为,山地草地的牧草含水量受海拔、降水量、植被种类影响,可利用风干干鲜比与烘干干鲜比的比例系数,快速准确估算不同山地草地的饲草供给量。
The experiment collected mixed herbage of alpine meadows,mountain meadows,mountain meadow grasslands,mountain grasslands,mountain desert grasslands and plain lowland meadows at different altitudes,tested the water content after air drying and drying treatment,and then calculated the dry-fresh ratio.The results showed that the dry-fresh ratio of pastures in mountain grasslands at different altitudes was quite different,and the water content of pastures decreased gradually from high altitude alpine meadows to low altitude mountain desert grasslands;the dry-fresh ratio of pastures in the same mountain meadow type(mountain meadow)was also different;the dry-fresh ratio of pastures in plain lowland meadow and the middle of mountain vertical zone was not significant(P>0.05).However,the dry-fresh ratio of pastures was significantly higher than that of the vertical forages(P<0.05).The air-drying dry-fresh ratio of different grassland types was 5%-32% higher than that of dried grass.According to the analysis,the water content of pastures in mountain grasslands was affected by altitude,precipitation and vegetation types.The ratio coefficient of the air-drying dry-fresh ratio and the drying dry-fresh ratio can be used to quickly and accurately estimate the forage supply in different mountain grasslands.
作者
李静
LI Jing(Yili Normal University,Yining,Xinjiang 835000)
出处
《安徽农业科学》
CAS
2020年第17期108-111,共4页
Journal of Anhui Agricultural Sciences
基金
伊犁师范大学应用型重点项目(2017YSYY04)。
关键词
伊犁河谷
山地草地
天然牧草
含水量
干鲜比
Yili River valley
Mountain grassland
Natural forage
Water content
Dry-fresh ratio
