Interactive effects of soil texture and salinity on nitrous oxide emissions following crop residue amendment

Geoderma ◽  
2019 ◽  
Vol 337 ◽  
pp. 1146-1154 ◽  
Author(s):  
Yongxiang Yu ◽  
Chengyi Zhao ◽  
Ningguo Zheng ◽  
Hongtao Jia ◽  
Huaiying Yao
2013 ◽  
Vol 19 (10) ◽  
pp. 2956-2964 ◽  
Author(s):  
Huaihai Chen ◽  
Xuechao Li ◽  
Feng Hu ◽  
Wei Shi

2019 ◽  
Vol 83 (5) ◽  
pp. 1399-1409 ◽  
Author(s):  
Perik Seiz ◽  
Ivan Guzman-Bustamante ◽  
Rudolf Schulz ◽  
Torsten Müller ◽  
Reiner Ruser

2021 ◽  
Vol 209 ◽  
pp. 104910
Author(s):  
Guangdi D. Li ◽  
Graeme D. Schwenke ◽  
Richard C. Hayes ◽  
Adam J. Lowrie ◽  
Richard J. Lowrie ◽  
...  

2003 ◽  
Vol 83 (4) ◽  
pp. 343-352 ◽  
Author(s):  
X. M. Yang ◽  
C. F. Drury ◽  
W. D. Reynolds ◽  
C. S. Tan ◽  
D. J. McKenney

The composting process results in immobilization of inorganic N. When high-Ndemanding crops are grown in compost- amended soils, additional N fertilizer is often applied. The combination of elevated nitrate levels from N fertilizer and high C inputs from the compost may result in enhanced greenhouse gas emissions. Hence, the objective of this laboratory incubation study was to characterize CO2 and N2O emissions from a Brookston clay loam soil that has received organic amendments in the presence or absence of added nitrate. The organic amendments included urban yard waste compost (YWC), liquid pig manure + wheat straw compost (PMC), and liquid pig manure (LPM). The nitrate treatments included added nitrate (100 mg KNO3-N kg soil-1) or no added nitrate. Total CO2 emissions during aerobic incubation followed the pattern: YWC > LPM > PMC > control (no organic amendments) for both nitrate treatments. Nitrate addition increased CO2 emissions from the YWC- and LPM-amended soils by 9 and 43%, respectively, but had no significant effect (P < 0.05) on CO2 emissions from the control or the PMC-amended soil. All organic amendments increased N2O emissions compared to the control. When nitrate was added to aerobically incubated LPM-amended soils, N2O emissions were increased over seven times; however, N2O emissions were decreased by 93% for PMC-amended soils and by 50% for YWC-amended soils. These decreases in N2O production occurred when nitrate was added to the YWC and PMC treatments under aerobic conditions but not under anaerobic conditions. Composted liquid pig manure was found to be more environmentally friendly than raw liquid pig manure as it stabilized the manure C and reduced CO2 and N2O emissions compared to the liquid pig manure. Key words: Compost, liquid pig manure, carbon dioxide, nitrous oxide, denitrification


2016 ◽  
Vol 55 (1) ◽  
pp. 1-9 ◽  
Author(s):  
B.P. Hyde ◽  
P.J. Forrestal ◽  
M.M.R. Jahangir ◽  
M. Ryan ◽  
A.F. Fanning ◽  
...  

Abstract Nitrous oxide (N2O) is an important and potent greenhouse gas (GHG). Although application of nitrogen (N) fertiliser is a feature of many grazing systems, limited data is available on N2O emissions in grassland as a result of the interaction between urine, dung and fertiliser N. A small plot study was conducted to identify the individual and interactive effects of calcium ammonium nitrate (CAN) fertiliser, dung and urine. Application of CAN with dung and urine significantly increased the mass of N2O-N emission. Importantly, the sum of N2O-N emitted from dung and CAN applied individually approximated the emission from dung and CAN fertiliser applied together, that is, an additive effect. However, in the case of urine and CAN applied together, the emission was more than double the sum of the emission from urine and CAN fertiliser applied individually, that is, a multiplicative effect. Nitrous oxide emissions from dung, urine and fertiliser N are typically derived individually and these individual emission estimates are aggregated to produce estimates of N2O emission. The presented findings have important implications for how individual emission factors are aggregated; they suggest that the multiplicative effect of the addition of CAN fertiliser to urine patches needs to be taken into account to refine the estimation of N2O emissions from grazing grasslands.


2017 ◽  
Vol 56 (1) ◽  
pp. 54-64 ◽  
Author(s):  
D.J. Krol ◽  
E. Minet ◽  
P.J. Forrestal ◽  
G.J. Lanigan ◽  
O. Mathieu ◽  
...  

AbstractPasture-based livestock agriculture is a major source of greenhouse gas (GHG) nitrous oxide (N2O). Although a body of research is available on the effect of urine patch N or fertiliser N on N2O emissions, limited data is available on the effect of fertiliser N applied to patches of urinary N, which can cover up to a fifth of the yearly grazed area. This study investigated whether the sum of N2O emissions from urine and a range of N fertilisers, calcium ammonium nitrate (CAN) or urea ± urease inhibitor ± nitrification inhibitor, applied alone (disaggregated and re-aggregated) approximated the N2O emission of urine and fertiliser N applied together (aggregated). Application of fertiliser to urine patches did not significantly increase either the cumulative yearly N2O emissions or the N2O emission factor in comparison to urine and fertiliser applied separately with the emissions re-aggregated. However, there was a consistent trend for approximately 20% underestimation of N2O loss generated from fertiliser and urine applied separately when compared to figures generated when urine and fertiliser were applied together. N2O emission factors from fertilisers were 0.02%, 0.06%, 0.17% and 0.25% from urea ± dicyandiamide (DCD), urea + N-(n-butyl) thiophosphoric triamide (NBPT) + DCD, urea + NBPT and urea, respectively, while the emission factor for urine alone was 0.33%. Calcium ammonium nitrate and urea did not interact differently with urine even when the urea included DCD. N2O losses could be reduced by switching from CAN to urea-based fertilisers.


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