中国生态农业学报2017，Vol.25Issue(8)：1099-1105,7.DOI:10.13930/j.cnki.cjea.170125
长春地区食物链磷素养分流动历史变化特征分析
Analysis of historical characteristics of phosphorus nutrient flow in food chain in Changchun area
摘要
Abstract
Phosphorus is an important element of life, whose cycle and transformation are critical in the food chain. With statistical and literature data, the trends and characteristics of phosphorus flow in the food chain in Changchun area were investigated for the period 1993–2013 using the NUFER (Nutrient flows in Food chain, Environment and Resources use) model. The study determined the existing problems, put forward strategies and provided examples of optimal management of phosphorus in the food chain. The results showed that total input of phosphorus in the food chain system in Changchun area increased from 32.6 Gg in 1993 to 113.9 Gg in 2013. In food production, phosphorus flow in animal-derived food increased from 0.7 Gg in 1993 to 2.7 Gg in 2013, and that of plant-derived food dropped from 16.1 Gg in 1993 to 15.7 Gg in 2013. In food consumption, phosphorus flow rate in ani-mal-derived food increased from 0.5 Gg in 1993 to 1.1 Gg in 2013, and phosphorus flow in plant-derived food dropped from 5.0 Gg in 1993 to 4.4 Gg in 2013. In the last two decades, phosphorus accumulation in the form of waste in the food chain increased by 15%, while phosphorus loss via runoff, leaching and erosion increased by 17.6 Gg. Up till 2013, the rate of phosphorus loss in the food chain was 20.2%. The trend in phosphorus use efficiency in various paths of the food chain decreased, in which the phosphorus utili-zation rate by animals/crops decreased from 94.2%/4.1% to 49.3%/3.8%, respectively. Phosphorus use efficiency in the whole food chain decreased by 20.3%. At the same time, the recycling efficiency of phosphorus gradually reduced. In the last two decades, phosphorus flow of food chain in Changchun area followed the path of "high input, high accumulation, high loss, low efficiency and low recycle". Therefore, it was important to control phosphorus input, reduce phosphorus loss, increase phosphorus recycling in waste and enhance the rate of phosphorus use efficiency in Changchun area.关键词
磷素/NUFER模型/食物链/养分流动/磷素利用效率/磷素损失率/长春地区Key words
Phosphorus/NUFER model/Food chain/Nutrient flow/Phosphorus use efficiency/Phosphorus loss rate/Chang-chun area分类
农业科技引用本文复制引用
张晓萌,王寅,焉莉,冯国忠,高强..长春地区食物链磷素养分流动历史变化特征分析[J].中国生态农业学报,2017,25(8):1099-1105,7.基金项目
国家公益性行业(农业)科研专项(201103003)资助 This study was supported by the Special Fund for Agro-scientific Research in the Public Interest of China (201103003). （农业）
