北疆牧区山地草甸草地生产力动态监测与评价  

Monitoring and evaluation of productivity of mountain meadow in northern Xinjiang

作　　者：柴琦[1] 李霞[1] 梁天刚[1] 

机构地区：[1]兰州大学草地农业科技学院甘肃草原生态研究所,甘肃兰州730020

出　　处：《草业科学》2009年第4期12-15,共4页Pratacultural Science

基　　金：国家自然科学基金资助项目(30571316)

摘　　要：研究采用实地样方测量法,分析了北疆山地草甸草地盖度、草层平均高度和鲜草产量的季节和年份间的动态变化。结果表明,草地盖度、平均草层高度和鲜草产量在年内呈单峰变化,在6月中旬或7月中旬达到最高,分别为96%、36.4cm和8422kg/hm2;年际间的变化受水、热条件影响,其中鲜草产量对水、热条件响应最为敏感,2004-2006年草地盖度、平均草层高度和鲜草产量的变幅分别达到2.94%、3.36%和42.5%。Based on the field survey, the variation of coverage, average height and fresh grass yield of mountain meadow in northern Xinjiang were analyzed. The result showed that the variation changed periodically and showed the single peak pattern which was strongly associated with the temperature and precipitation. The coverage, average height and fresh grass yield reached the highest in mid June （96%, 36.4 cm and 8 422 hg/hm^2 respectively） and the lowest in mid May （80%, 14.8 cm and 1 086 hg/hm^2） within one year. The variation among years depended on the precipitation and temperature, in which, the response of fresh grass yield was the most sensitive. The amplitude of variation of coverage, average height and fresh grass yield from 2004 to 2006 was 2. 94%, 3.36% and 42.59% respectively.

关 键 词：山地草甸 草地生产能力 监测 

分 类 号：S812[农业科学—草业科学]