CAJ | 학술논문

通过获取2002―2013年湛江地区的自然资源、工业、农业、人口和环保等基本统计数据和相关参数，评估了湛江市辖区氮素的来源去向、收支演变趋势及环境效应。结果显示，氮输入总量在35444.03~40466.69 t波动；氮源的贡献为化肥氮、人畜排泄物、大气沉降、作物残体和工业废水，其中化肥氮的贡献率从2006年开始呈降低趋势，2008年之后趋于平稳，这可能与2006年湛江开始实施农田测土配方施肥有关；而工业废水氮的输入量在2010年之后迅速增加，与2009年东海岛工业基地的开工有关。氮输出总量在2002―2006年增长了16.35%，2007年开始降低并趋于稳定。氮负荷较高且与耕地面积比例显著相关。氮盈余量变化较大，2002年为6865.97 t，2013年降低到3998.96 t，呈减少趋势；年盈余负荷由47.03下降至23.48 kg/hm2。对单位面积施肥量和作物收获氮/施氮量值的分析表明，该地区面临着氮收支不平衡造成的氮污染潜势。
통과획취2002―2013년담강지구적자연자원、공업、농업、인구화배보등기본통계수거화상관삼수，평고료담강시할구담소적래원거향、수지연변추세급배경효응。결과현시，담수입총량재35444.03~40466.69 t파동；담원적공헌위화비담、인축배설물、대기침강、작물잔체화공업폐수，기중화비담적공헌솔종2006년개시정강저추세，2008년지후추우평은，저가능여2006년담강개시실시농전측토배방시비유관；이공업폐수담적수입량재2010년지후신속증가，여2009년동해도공업기지적개공유관。담수출총량재2002―2006년증장료16.35%，2007년개시강저병추우은정。담부하교고차여경지면적비례현저상관。담영여량변화교대，2002년위6865.97 t，2013년강저도3998.96 t，정감소추세；년영여부하유47.03하강지23.48 kg/hm2。대단위면적시비량화작물수획담/시담량치적분석표명，해지구면림착담수지불평형조성적담오염잠세。
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.