NDLI: The effect of different tillage and residue management practices on soil characteristics, inorganic N dynamics and emissions of N$_{2}$O, CO$_{2}$ and CH$_{4}$ in the central highlands of Mexico: a laboratory study

Content Provider	Springer Nature Link
Author	Patiño Zúñiga, L. Ceja Navarro, J. A. Govaerts, B. Luna Guido, M. Sayre, K. D. Dendooven, L.
Copyright Year	2008
Abstract	Conservation agriculture in its version of permanent raised bed planting with crop residue retention increases yields and improves soil characteristics, e.g. aggregate distribution, organic matter content, so it remained to be seen how greenhouse gas emissions and dynamics of C and N might be altered. The objective of this study was to investigate how conservation agriculture with permanent raised beds, tied ridges, i.e. dykes within the furrows to prevent water run-off, and residue retention affected greenhouse gas emissions. A field experiment was started in 1999 comparing permanent and conventionally tilled raised beds with different residue management under rain fed conditions. Soil was characterized and emissions of CH$_{4}$, N$_{2}$O and CO$_{2}$ and dynamics of NH$_{4}$ $^{+}$, NO$_{2}$ $^{−}$ and NO$_{3}$ $^{−}$ were monitored in a laboratory experiment. The crop and tied ridges had no effect on soil characteristics and dynamics of C and N. Tilled beds reduced the water holding capacity (WHC) 1.1 times and increased conductivity 1.3 times compared to soil under nontilled beds with retention of all crop residues. The WHC, organic C, soil microbial biomass and total N were ≥1.1 larger in soil from nontilled beds where the crop residue was retained compared to where it was removed after only 6 years. The emission of CO$_{2}$ was 1.2 times and production of NO$_{3}$ $^{−}$ 1.8 times larger in nontilled beds where the crop residue was retained compared to where it was removed. The CO$_{2}$ emission was 1.2 times and the emission of N$_{2}$O after 1 day 2.3 times larger in soil under tilled beds compared to nontilled beds with full residue retention, while the increase in concentration of NO$_{3}$ $^{−}$ was 0.05 mg N kg$^{−1}$ soil in the former and 2.38 in the latter. We found that permanent raised bed planting with crop residue retention decreased emissions of N$_{2}$O and CO$_{2}$ compared to soil under conventionally tilled raised beds. Production of NO$_{3}$ $^{−}$ is larger in soil with permanent raised bed planting with crop residue retention compared to conventionally tilled raised beds.
Starting Page	231
Ending Page	241
Page Count	11
File Format	PDF
ISSN	0032079X
Journal	Plant and Soil
Volume Number	314
Issue Number	1-2
e-ISSN	15735036
Language	English
Publisher	Springer Netherlands
Publisher Date	2008-08-15
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Conservation agriculture C and N mineralization Methane oxidation Microbial biomass Nitrous oxide emission Water content Ecology Plant Physiology Soil Science & Conservation Plant Sciences
Content Type	Text
Resource Type	Article
Subject	Soil Science Plant Science

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