Comprehensive scores of grassland resources in different ecological functional areas of Gansu Province and their causes
According to the regional differentiation law of natural climate in Gansu province,the grassland in Gansu province was di-vided into five grassland ecological function zones:Gannan alpine grassland ecological function zone,Qilian Mountain-Aljinshan mountain meadow,grassland ecological function zone,Hexi Corridor desert grassland ecological function zone,Loess Plateau arid grassland ecologi-cal function zone,Longnan mountain grass grassland ecological function zone.From the current forest and grassland resources database of Gansu Province,the grassland map spots and related attribute factors were extracted to form the grassland thematic database.Four indexes of grassland comprehensive vegetation coverage,forage yield per unit area(kg/hm2),edible forage ratio(%)and livestock carrying ca-pacity(hm 2/sheep per unit·year)were calculated in the five grassland ecological function zones of the province.The results showed that the scores of comprehensive analysis and evaluation of grassland resources in different ecological functional areas were obtained by adding weight coefficients,and the calculated results were assigned 100 points.The highest score was assigned 100 points to the ecological func-tional area of Longnan mountain grassland.The ecological function zone of Gannan alpine grassland was 94.11 points.The ecological functional area of arid grassland on the Loess Plateau was 50.41 points.The ecological function zone of desert steppe in Hexi Corridor was 26.07 points.The ecological function zone of the grassland and meadow in Qilian Mountains and Altun Mountains was 18.36 points.
Gansu provinceecological function areagrassland resourcesgrassland comprehensive vegetation coverage
NETL
NSTL
万方数据
