热带地理Issue(5)：777-784,8.DOI:10.13284/j.cnki.rddl.002752
湛江市辖区2002-2013年氮收支演变及环境效应
Nitrogen Budget Evolution in Zhanjiang Municipal District and Its Environmental Effect during 2002-2013
摘要
Abstract
By using the basic statistical data (natural resources, industry, agriculture, population and environmental protection) and related parameters in Zhanjiang Area during 2002-2013, the Nitrogen budget in Zhanjiang municipal district and its environmental effect were assessed. Results show that total Nitrogen input fluctuated during 35 444.03~40 466.69 t; the Nitrogen source was from fertilizer nitrogen, human and animal excretion, atmospheric settlement, farmland, crop residual body and industrial wastewater, respectively; the contribution of fertilizer Nitrogen was reducing from 2006 and tended to be steady after 2008, this phenomenon might be related to farmland soil testing formula fertilization which began in Zhanjiang in 2006. The reason that the wastewater Nitrogen input increased rapidly after 2010 was the construction of industrial base of East Island in 2009. Total Nitrogen output increased by 16.35%during 2002-2006, and began to decrease and stabilize from 2007. Nitrogen load was relatively high and significantly correlated with the proportion of cultivated land area. The surplus of Nitrogen varied widely, which was 6 865.97 t in 2002 and down to 3 998.96 t in 2013, showing a reducing trend. Surplus of Nitrogen load decreased from 47.03 to 23.48 kg/hm2·per year. Our results show that the district is facing potential Nitrogen pollution caused by imbalance of Nitrogen budget.关键词
氮收支/氮负荷/演变趋势/环境效应/湛江市Key words
Nitrogen budget/Nitrogen load/evolution trend/environmental effect/Zhanjiang分类
资源环境引用本文复制引用
孟亚飞,陈法锦,曾珍..湛江市辖区2002-2013年氮收支演变及环境效应[J].热带地理,2015,(5):777-784,8.基金项目
国家自然科学基金（41476066）；广东海洋大学创新强校项目（GDOU2014050229）；广东海洋大学校选项目 （）
