摘要
通过近25年相关资料,分析鄂温克地区天然草原生态环境状况,提出生态保护建议。结果表明:1990—2015年,鄂温克地区≥0℃有效积温呈显著上升趋势,其年际变化率为10 a上升112.14℃;生长季(5—8月)降水量呈下降趋势,其年际变化率为10 a下降13.24 mm;日照时数年际变化不明显;天然草场牧草盖度呈显著下降趋势,其年际变化率为10 a减少8.51%;地上生物量呈下降趋势,其年际变化率为10 a降低23.5 g/m^2。鄂温克地区天然草原总体生态环境状况呈下降趋势,当地行政主管部门应适当控制草原的载畜量,恢复草原植被,遏制草地荒漠化。
Based on the relevant information, ecological environment of natural prairie of Evenki region was analyzed and we proposed ecological protection recommendations. The results showed that the effective accumulated temperature of ≥0 ℃ appeared a significant upward trend,the annual variation rate was 112.14℃/10a. Precipitation in growing season （from May to Augnst）was on the decline,with an annual variation rate of -13.24 mm/10a. The annum variation of sunshine time was not obvious. The grass coverage of natural pasture showed a significant downward trend, and its annual variation rate was -8.51%/10a. In addition, aboveground biomass decreased by the rate of -23.5 （g/m）/10a. Ecological environment of natural prairie of Evenki region showed a downward trend, local administrative departments should properly control the stocking rates and restore the prairie vegetation and curb the grassland desertification.
出处
《北方农业学报》
2016年第6期86-90,共5页
Journal of Northern Agriculture
基金
呼伦贝尔市气象局业务应用开发项目(2014020)
关键词
鄂温克草原
生态环境
气候
Ewenki prairie
Ecological environment
Climate
