北疆牧区山地草甸草地生产力动态监测与评价

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%、36.4 cm和8 422 kg/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%。

Monitoring and evaluation of productivity of mountain meadow in northern Xinjiang

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/hm2 respectively) and the lowest in mid May (80%, 14.8 cm and 1 086 hg/hm2) within one year. ...