居民食物氮足迹分析及其动态研究

A Dynamic Study and an Analysis on the Food Nitrogen Footprint of Residents

以食物氮足迹为切入点,基于氮足迹计算模型,计算了2000-2014年浙江省居民食物氮足迹,研究了氮足迹动态变化特点及其与经济社会因子间的关系。结果表明：（1）浙江省城镇和农村居民的食物氮足迹变化分别与各自的食物消费量变化趋势相同,城镇为16.85~20.10kg（N）/a,农村为12.72~16.40kg（N）/a;（2）城镇居民的荤食、素食和副食氮足迹分别为40.19%~45.23%、35.42%~42.60%、17.02%~19.35%,农村分别为16.79%~34.99%、51.99%~78.11%、5.10%~13.13%;（3）城镇居民的食物氮足迹与人均可支配收入呈正相关、与人口数量、恩格尔系数和食物价格指数呈负相关,而农村居民食物氮足迹相关情况与前者相反。浙江省城镇居民的饮食消费模式不利于减缓食物氮足迹高通量状况,城市化进程将加速浙江省的氮足迹增长。食物氮足迹的计算可为改变高氮消费模式提供参考,引导＂低氮型＂生活。

Taking food nitrogen footprint （FNF） as a breakthrough point and based on an N-calculator model, the FNF of urban and rural residents in Zhejiang Province in the period of 2000 - 2014 were calculated, and the characteristic trends and associated socio-economic factors were analysed. It has indicated that the changes in FNF of urban and rural residents in Zhejiang Province were consistent with the changing trends of the amount of their individual food consumption （FC） ranging from 16.85 to 20.10 and from 12.72 to 16.40 kilograms of nitrogen per annum, respectively. The proportions of FNF from animal food, vegetarian diet and subsidiary foodstuff were 40.19% - 45.23%, 35.42% - 42.60%, 17.02% - 19.35% for urban residents, and 16.79% - 34.99%, 51.99% - 78.11%, 5.10% - 13.13% for rural residents, respectively. The FNF of urban residents was correlated positively with disposable income per capita, and negatively with population, Engel＇s coefficient and food price index, whilst that of rural residents was just in contrary. The FC pattern of urban residents was not conducive to slowing down high throughput of FNF, and the urbanisation process would accelerate the growth of FNF in Zhejiang Province. Such a calculation of FNF could provide a support to alter high nitrogen consumption patterns whilst leading to a ＂low nitrogen＂ life.