【摘要】 夏河县作为甘肃省重要的草地畜牧业生产基地及黄河流域重要的水涵养区和生态安全屏障,其天然草原对保护当地草牧业生产的健康发展和黄河流域生态安全具有十分重要的意义。为及时掌握夏河县草原资源现状,结合遥感等现代信息技术,对夏河县天然草原的分布、分类和面积等进行了调查与评价。结果表明:夏河县草原总面积52.43万hm~2,有山地草甸、高寒草甸和温性草原3个草原类,7个草原型,其中山地草甸和高寒草甸分别占全县草原总面积的50.71%和41.88%;山地草甸占阿木去乎镇、博拉乡、甘加乡、吉仓乡、拉卜楞镇、曲奥乡、扎油乡、达麦乡、唐尕昂乡等各自草原面积的50%以上,高寒草甸占科才乡、桑科乡和牙利吉乡等各自草原面积的50%以上,温性草原主要分布在甘加、麻当和王格尔塘等乡镇,面积均在6 500 hm~2以上。山地草甸植被盖度(96.80%)极显著高于温性草原(84.25%)(P<0.01),山地草甸和高寒草甸可食牧草产量分别是温性草原(1 100.18 kg/hm~2)的2.23倍和2.04倍。更多还原

【Abstract】 Xiahe county is an important grassland animal husbandry production base in Gansu province and an important water conservation area and ecological security barrier in the Yellow River Basin. Natural grassland is of great significance to protect the healthy development of local grassland animal husbandry development and the ecological security of the Yellow River Basin. In order to understand the current situation of grassland resources in Xiahe county,combineing with remote sensing and other modern information technologies,investigating and evaluating the distribution,classification and area of natural grassland in Xiahe county.The result showed that the total grassland area of Xiahe county was 524 300 hm~2,with 3 grassland classes including mountain meadow,alpine meadow and warm steppe,and 7 grassland types.Mountain meadow and alpine meadow accounted for50.71% and 41.88% of the total grassland area of the county respectively,mountain meadow accounted for more than 50% of the grassland area of Bola,Ganjia,Jicang,Tanggaang,Quao,Zhayou,Damai country and Amuquhu,Lapuleng town,etc,alpine meadow accounted for more than 50% of the grassland area of Kecai,Sangke and Yaliji country,warm steppe with an area of more than 6 500 hm~2 were mainly distributed in Ganjia,Madang and Wangertang country.The vegetation coverage of mountain meadow(96.80%)was significantlyhigher than the warm steppe(84.25%),the forage yield of mountain meadowand alpine meadowwere2.23 times and 2.04 times of that of warm steppe(1 100.18 kg/hm~2)respectively.更多还原