鼠害对草地生物量的危害损失分析

利用中国畜牧业统计资料,结合全国草地覆盖遥感数据,采用生态能学方法,分析了2000—2010年中国草地鼠害发生的空间分布特征与变化趋势,评估了鼠害对草地生态系统生物量的危害损失。结果表明:2000—2010年,中国草地鼠害的发生面积、发生程度和造成的损失总体呈上升趋势;11年间全国由于鼠害造成草地生物量的损失年均约1.181 54×10~7 t,年份间鼠害差异大,2006年草地生物量损失最大,为2.537 23×10~7 t;区域草地鼠害损失大小排序为西南、西北、华北、东北,西藏自治区鼠害最严重,年均草地生物量损失占全国总量的38.09%。

Analysis of biomass loss from rodent pest in grassland

Based on the statistical data of animal husbandry and remote sensing data of grassland coverage, we analyzed the spatial distribution and occurrence trend of rodent pest in grassland and estimated biomass loss in grassland ecosystem caused by rodent pest by the method of ecological energetics from 2000 to 2010 in China. Results showed that the occurrence areas and occurrence intensity of rodent pest and the biomass loss of grassland showed general upward trend, and the average annual loss of grassland caused by rodent pest was about 11.8154 million tons from 2000 to 2010. The grassland loss between years varied widely and in 2006 there was the largest loss of 25.3723 million tons. The grassland loss in descending order for regions was Southwest, Northwest, North and Northeast, and among the provinces, the most serious loss occurred in Tibet where the average annual loss accounted for 38.09 % of the national total.