Based on the situation of agricultural eco-economy in Minqin County

select the period from 1994 to 2003

when Minqin County was typical in the damages to ecosystem in the region

using energy value method investigate and analyze the components and their indicators related to energy flow within the agro-ecosystems in that 10 years.In the period

the annual energy inputs in agricultural eco-economic system of the county was 1.51E +21 sej

of which contribution of environmental resources was only 22.47% and renewable environmental resources

only 15.00% of the total energy input

while industry supplemental energy in socio-economic inputs reached as high as 57.20% of the total energy.By comparative analysis

Minqin energy density was found to be in a lower level.In view of the environmental loading ratio(ELR)

the agricultural ecosystem of Minqin County presented a typical characteristic of petrochemical agriculture in the Hexi region.In view of the energy-based sustainability index(ESI)

the sustainability of the agricultural ecosystem development of Minqin County in the 10 years was not only poor

but also showed a declining trend year by year.