Straw management, crop rotation and nitrogen source effect on carbon and nitrogen dynamics: A laboratory study

A. Montoya-González, O. E. González-Navarro, B. Govaerts, K. D. Sayre, I. Estrada, M. Luna-Guido, J. A. Ceja-Navarro, L. Patiño-Zúñiga, R. Marsch, L. Dendooven

Research output: Contribution to journalArticlepeer-review

19 Scopus citations

Abstract

Straw incorporation, crop rotation and organic fertilizer applications have been proposed to counter the negative effects of straw burning, inorganic N fertilizer application and intensive agriculture practices for wheat production in the state of Sonora (México). A laboratory study was done to investigate how these alternative agriculture practices applied for 9 years affected carbon dioxide (CO2), nitrous oxide (N2O) and nitrogen (N2) emissions and inorganic N in soil. Emission of CO2 decreased 1.2 times in soil burned compared to soil where residue was incorporated, but emissions of N2 increased 4.1 times and the increase in inorganic N or the N mineralization rate 1.4 times. Including Sesbania spp. in the crop rotation reduced N mineralization rate 1.2 times when residue was burned, but increased it 1.5 times when it was incorporated compared to clean fallow or the cultivation of maize. Fertilizing soil with urea increased the N mineralization rate 4.9 times and the N2O emission 2 times while chicken manure increased it 11.4 times and 3.7 times, respectively, compared to the unamended soil when residue was burned. It was found that burning of crop residue increased N mineralization and N2 emissions, but decreased microbial activity. Addition of chicken manure increased emissions of N2O and CO2 and concentrations of NO3-.

Original languageEnglish (US)
Pages (from-to)243-253
Number of pages11
JournalPlant and Soil
Volume325
Issue number1
DOIs
StatePublished - Jan 2009
Externally publishedYes

Keywords

  • C and N mineralization
  • Chicken manure
  • Clean fallow
  • N emission
  • NO emissions
  • Sesbania spp.

ASJC Scopus subject areas

  • Soil Science
  • Plant Science

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