Impact of Dietary Habit Change on Biomass Utilization: Energy Flow Analysis of Japan's Food System.

概要

論文の詳細を見る
This paper explores the relationship between dietary habit and Biomass resources based on a model developed for biological energy analysis of Japan's food system. Changes in net primary production (NPP) consumption, energy loss, and effectiveness of the systems are analyzed for the years 1962, 1965, 1970, 1975, 1980, 1985, 1990, 1995 and 1997. From 1962 to 1997, the total NPP inflow into Japan's food system rose 101 percent from 525×1012 kcal/yr to 1, 054×1012 kcal/yr while, the total energy loss of the food system increased 112 percent from 461×1012 kcal/yr to 977×1012 kcal/yr. The total efficiency for the system transferring biological energy from NPP of plants to intake of food decreased by 36 percent. Per capita, the NPP consumption for dietary purposes increased 50 percent from 15, 140 kcal/day to 22, 918 kcal/day from 1962 to 1997, while the energy loss increased 60 percent from 13, 549 kcal/day to 21, 224 kcal/day. With increased food and animal feed imports, the overseas quotient of NPP increased from 27 to 67 percent, and the overseas quotient of energy loss increased from 29 to 60 percent. It is estimated that 66×1012 kcal of NPP consumption could be avoided in one year if waste in the food consumption process is decreased by 20 percent, also 38×1012 kcal of NPP could be saved one year if 20 percent of the dietary energy intake of livestock food is replaced by plant food products.
社団法人環境科学会の論文