Advantages of nitrogen fertilizer deep placement in greenhouse gas emissions and net ecosystem economic benefits from no-tillage paddy fields

2020 ◽  
Vol 263 ◽  
pp. 121322 ◽  
Author(s):  
T.Q. Liu ◽  
S.H. Li ◽  
L.G. Guo ◽  
C.G. Cao ◽  
C.F. Li ◽  
...  
Keyword(s):  
Greenhouse Gas Emissions ◽  
Greenhouse Gas ◽  
Nitrogen Fertilizer ◽  
Economic Benefits ◽  
Paddy Fields ◽  
No Tillage ◽  
Gas Emissions ◽  
Deep Placement

scholarly journals Effects of Different Types of Water and Nitrogen Fertilizer Management on Greenhouse Gas Emissions, Yield, and Water Consumption of Paddy Fields in Cold Region of China

2019 ◽  
Vol 16 (9) ◽  
pp. 1639 ◽  
Author(s):  
Tangzhe Nie ◽  
Peng Chen ◽  
Zhongxue Zhang ◽  
Zhijuan Qi ◽  
Yanyu Lin ◽  
...  
Keyword(s):  
Greenhouse Gas Emissions ◽  
Greenhouse Gas ◽  
Water Consumption ◽  
Nitrogen Fertilizer ◽  
Paddy Fields ◽  
High Yield ◽  
N2o Emissions ◽  
Cold Region ◽  
N Application ◽  
Gas Emissions

Water management and nitrogen (N) fertilizers are the two main driving factors of greenhouse gas emissions. In this paper, two irrigation modes, controlled irrigation (CI) and flood irrigation (FI), and four nitrogen fertilizer levels (N0: 0, N1: 85, N2: 110, and N3: 135 kg·hm−2) were set to study the effect of different irrigation modes and N fertilizer amount on greenhouse-gas emissions of paddy fields in cold region by using the static chamber-gas chromatograph method; yield and water consumption were also analyzed. The results showed that, compared with FI, CI significantly reduced CH4 emissions by 19.42~46.94%, but increased N2O emissions by 5.66~11.85%. Under the two irrigation modes, N fertilizers could significantly increase N2O emissions, but the CH4 emissions of each N treatment showed few differences. Compared with FI, appropriate N application under CI could significantly increase grain number per spike, seed-setting rate, and 1000-grain weight, thus increasing yield. Under the two irrigation modes, water consumption increased with the increase of N application rate, and the total water consumption of CI was significantly lower than that of FI. The global warming potential (GWP) of CI was significantly smaller than that of FI. The trend of GWP in each treatment was similar to that of CH4. Through comprehensive comparison and analysis of water productivity (WP), gas emission intensity (GHGI), and the yield of each treatment, we found that CI+N2 treatment had the highest WP (2.05 kg·m−3) and lowest GHGI (0.37 kg CO2-eq·kg−1), while maintaining high yield (10,224.4 kg·hm−2). The results of this study provide an important basis for guiding high yield, water-savings, and emission reduction of paddy fields in cold regions.

scholarly journals Spatiotemporal Evolution of Global Greenhouse Gas Emissions Transferring via Trade: Influencing Factors and Policy Implications

2020 ◽  
Vol 17 (14) ◽  
pp. 5065 ◽  
Author(s):  
Zhangqi Zhong ◽  
Xu Zhang ◽  
Weina Gao
Keyword(s):  
Greenhouse Gas Emissions ◽  
Greenhouse Gas ◽  
Global Climate ◽  
Anthropogenic Activities ◽  
Spillover Effects ◽  
Economic Benefits ◽  
Policy Implications ◽  
Energy Structure ◽  
Gas Emissions ◽  
Factors Influencing

Global climate change caused by greenhouse gas emissions (GHGs) from anthropogenic activities have already become the focus of the world. A more systematic and comprehensive analysis on the factors influencing the changes of global GHGs transferring via trade have not been fully discussed. To this end, employing spatial econometric regression models and multi-regional input-output models, this paper reveals factors influencing the GHGs transferring via trade changes in 39 major economies, so as to develop the relevant GHGs reduction policies. The results indicate that regions with the highest net outflow of GHGs transferring via trade are primarily Russia and Canada, and the adverse effects of promoting GHGs reduction on the national economy could be avoided by these regions owing to trade relations. Additionally, factors influencing the changes in GHGs transferring via trade have significant spatial autocorrelation, and population size and energy structure exert significant spatial spillover effects on the changes in the GHGs transferring via trade. On this basis, this paper suggests that one more effective way to prevent trade from the rigorous demands of environmental governance measures while preserving the economic benefits of international trade may be to facilitate cooperation between countries on GHGs mitigation. Further, we articulate more balanced environment governance policies, including conducting the sharing of advanced energy technologies and developing clearer production technologies.

scholarly journals Elastic and plastic soil deformation and its influence on emission of greenhouse gases

2016 ◽  
Vol 30 (2) ◽  
pp. 173-184 ◽  
Author(s):  
Christoph Haas ◽  
Dörthe Holthusen ◽  
Anneka Mordhorst ◽  
Jerzy Lipiec ◽  
Rainer Horn
Keyword(s):  
Greenhouse Gas Emissions ◽  
Greenhouse Gas ◽  
Microbial Activity ◽  
Soil Management ◽  
Soil Strength ◽  
Reduced Tillage ◽  
No Tillage ◽  
Microbiological Activity ◽  
Gas Emissions ◽  
Stress Application

Abstract Soil management alters physical, chemical and biological soil properties. Stress application affects microbiological activity and habitats for microorganisms in the root zone and causes soil degradation. We hypothesized that stress application results in altered greenhouse gas emissions if soil strength is exceeded. In the experiments, soil management dependent greenhouse gas emissions of intact soil cores (no, reduced, conventional tillages) were determined using two experimental setups; CO2 emissions were determined with: a dynamic measurement system, and a static chamber method before and after a vertical soil stress had been applied. For the latter CH4 and N2O emissions were analyzed additionally. Stress dependent effects can be summed as follows: In the elastic deformation range microbiological activity increased in conventional tillage soil and decreased in reduced tillage and no tillage. Beyond the precompression stress a release of formerly protected soil organic carbon and an almost total loss of CH4 oxidizability occurred. Only swelling and shrinkage of no tillage and reduced tillage regenerated their microhabitat function. Thus, the direct link between soil strength and microbial activity can be applied as a marker for soil rigidity and the transition to new disequilibria concerning microbial activity and composition.

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