天然牧草地
天然牧草地-
草地很分散，部分草地围绕着林地，天然牧草地退化很严重。
Grass was scattered , some grass around the woodland , natural grassland degradation is very serious . 2 .
-
干旱区天然低湿牧草地参考作物蒸散量研究&以黑河中游为例
Study on the Reference Evapotranspiration of Natural Steppes in Arid Areas & A Case Study in the Middle Reaches of the Heihe River , Gansu Province