Decoupling Agricultural Nonpoint Source Pollution from Crop Production: A Case Study of Heilongjiang Land Reclamation Area, China

Modern agriculture often leads to nonpoint source pollution. From the perspective of a decoupling analysis, this research evaluates the relationship between crop production and agricultural nonpoint source pollution (via fertilizer application), using the Heilongjiang land reclamation area as a case study. As it is the largest commodity grain base and green food base in China, more than 80% of water pollution in this area comes from fertilizer application. This study adopts an export coefficient model to hindcast nitrogen loss delivered to surface water via fertilizer application and conduct a further analysis of decoupling agricultural nonpoint source pollution from crop production. The results indicated that weak decoupling frequently occurred. However, this tendency was not steady in the period 2001–2012, and weak decoupling was typical in each branch based on the average value. Regarding the example of decoupling agricultural nonpoint source pollution from rice production, weak decoupling occurred more often, but this tendency was not steady over time. In addition, expansive coupling occurred in 2006, 2010 and 2012, and there were no definite signs of it improving. All branches, except for the Suihua branch, reached the degree of weak decoupling. A basic fact is that a decoupling tendency and environmental deterioration coexist in both the past and present. The decoupling analysis will contribute to localized strategies for sustainable agricultural development.

[1]  K. Hubacek,et al.  Drivers of CO2 emissions in the former Soviet Union: A country level IPAT analysis from 1990 to 2010 , 2013 .

[2]  Yongqiang Yu,et al.  Changes in rice yields in China since 1980 associated with cultivar improvement, climate and crop management , 2012 .

[3]  G. Grossman,et al.  Economic Growth and the Environment , 1994 .

[4]  John P. Holdren,et al.  Science and Technology for Sustainable Well-Being , 2008, Science.

[5]  Douglas Crawford-Brown,et al.  Decoupling analysis and socioeconomic drivers of environmental pressure in China. , 2014, Environmental science & technology.

[6]  Penny J Johnes,et al.  Evaluation and management of the impact of land use change on the nitrogen and phosphorus load delivered to surface waters: the export coefficient modelling approach , 1996 .

[7]  Soon-Jin Hwang,et al.  Landscape ecological approach to the relationships of land use patterns in watersheds to water quality characteristics , 2009 .

[8]  Arjen Ysbert Hoekstra,et al.  The Water Footprint Assessment Manual , 2011 .

[9]  Qian Hong,et al.  Parameter uncertainty analysis of the non-point source pollution in the Daning River watershed of the Three Gorges Reservoir Region, China. , 2008, The Science of the total environment.

[10]  Yue-Jun Zhang,et al.  The decomposition of energy-related carbon emission and its decoupling with economic growth in China , 2015 .

[11]  Changsheng Li,et al.  Calibration of DNDC model for nitrate leaching from an intensively cultivated region of Northern China , 2014 .

[12]  Stefano Galmarini,et al.  Decoupling economic growth from carbon dioxide emissions: A decomposition analysis of Italian energy consumption , 2012 .

[13]  Bing Xue,et al.  Empirical study on the environmental pressure versus economic growth in China during 1991–2012 , 2015 .

[14]  Danae Diakoulaki,et al.  Decomposition analysis for assessing the progress in decoupling industrial growth from CO2 emissions in the EU manufacturing sector , 2007 .

[15]  P. Tapio.  Towards the theory of decoupling : Degrees of decoupling in the EU and the case of road traffic in Finland between 1970 and 2001 , 2022 .

[16]  C. S. Holling,et al.  Economic growth, carrying capacity, and the environment , 1995, Environment and Development Economics.

[17]  Shinji Kaneko,et al.  Decomposing the decoupling of CO2 emissions and economic growth in Brazil , 2011 .

[18]  刘建国 Liu Jianguo,et al.  The grey water footprint of the winter wheat-summer maize crop rotation system of the North China Plain , 2015 .

[19]  A. Hoekstra,et al.  A global and high-resolution assessment of the green, blue and grey water footprint of wheat , 2010 .

[20]  A. Hoekstra,et al.  The green, blue and grey water footprint of crops and derived crops products , 2011 .

[21]  Yang Qing-shan,et al.  Decoupling agricultural water consumption and environmental impact from crop production based on the water footprint method: A case study for the Heilongjiang land reclamation area, China , 2014 .

[22]  Nigussie Haregeweyn,et al.  Testing and evaluation of the agricultural non-point source pollution model (AGNPS) on Augucho catchment, western Hararghe, Ethiopia , 2003 .