关键词: 农业, 生态足迹, 区域产量法, 福建省

Abstract:

In order to make Ecological Footprint (EF) model better reflecting regional realities, the article significantly improved the calculating items of EF model. The arable land EF of meat and pollution EF of excreta of poultry, livestock and human were accounted firstly. Three EF categories, namely CO₂ absorption forest, decomposition land and water collection area were established to show the seriousness of agricultural pollution and the multiple ecological functions of arable land and forest. Fossil-fuel land was contained by forest land for absorbing CO₂; grazing land was canceled while the EF of grain used to produce meat was added arable land. The concerning pollution sources were expanded from fossil fuels to chemical-fertilizer, pesticide and excreta of poultry, livestock and human. Furthermore, the EF of pollutants such as CO₂, N, P and pesticide was counted.Fujian’s agricultural EF in 2007 was calculated by using average yields per-unit in recent five years, including the EF of direct inputs, farmers’ consumption and pollutants in agricultural practice. The category comparison between agricultural EF and Fujian’s Ecological Capacity (EC) was used to reflect the agricultural ecological-occupancy in the province. The calculation results indicated that the agricultural EF of forest-land, wetland, built-up area and pollutants-absorption land occupied small proportion of Fujian’s EC in 2007, being respectively 1.4%, 1.2%, 13.4% and 24.6%. This was largely due to high ecological productivity in the province and low consumption in underdevelopment rural areas. However, 94.2% of arable land EC was occupied by agriculture because of less arable land areas per capita and overdevelopment in grain-consumption livestock, which consumed 73.8% of the arable land EC. The EF of water collection area was 2.2 times that of relevant EC, indicating that serious ecological deficit occurred. In water collection area category, chemical fertilizer, excretion and freshwater aquaculture contributed respectively 36.8%, 23.5%, 39.7% in N and 41.8%, 12.9%, 45.4% in P. Some corresponding suggestions were proposed.

Key words: agriculture, ecological footprint, regional yield method, Fujian Province