@article{fdi:010089634,
  title = {{V}ariability in decomposition rate of sorghum cultivar residues linked to lignin content},
  author = {{N}tonta, {S}. and {Z}engeni, {R}. and {M}uchaonyerwa, {P}. and {C}haplot, {V}incent},
  editor = {},
  language = {{ENG}},
  abstract = {{C}rop residue decomposability in soils is of major importance for maintaining soil carbon ({C}) stocks and nitrogen ({N}) mineralization, which are vital for soil fertility and climate change mitigation. {T}he impact of biochemical quality on decomposition and {N} mineralization of sorghum cultivars and/or crop residue parts is not well documented. {I}n the present study, field and laboratory experiments spanning 168 and 120 days, respectively, were used to assess the rate of decomposition and {N} mineralization in soils from five sorghum cultivars and to relate the results with residue quality (i.e. lignin: {N} ratio) over time. {H}igh-quality cultivars (i.e., {M}amolokwane and {OS}-{P}otch) exhibit rapid decomposition (>50% {DM} loss) and elevated carbon dioxide emissions in shoots, attributed to a low lignin-to-nitrogen ratio. {L}ow-quality residues (i.e., {AS}8 and {KZ}5246) initially undergo net nitrogen immobilization, transitioning to mineralization at later stages. {N}otably, shoots consistently release more nitrogen than roots, with distinct {NO}3 -{N} mineralization values ranging from 22.7 to 11.5 mg {N}/kg for {OS}-{P}otch and {KZ}5246 shoots and 20.6 to 9.3 mg {N}/kg for their root residues. {R}esults suggest that low-quality sorghum residues, particularly {KZ}5246 and {AS}8 roots, release carbon and nitrogen at a slower rate, providing potential for carbon storage and limited nitrogen availability compared to high-quality residues like {OS}-{P}otch shoots.},
  keywords = {{D}ecomposition ; {R}esidue quality ; {C}arbon emissions ; {C}arbon storage ; {N}utrient cycling ; {AFRIQUE} {DU} {SUD}},
  booktitle = {},
  journal = {{R}hizosphere},
  volume = {29},
  numero = {},
  pages = {100850 [10 p.]},
  year = {2024},
  DOI = {10.1016/j.rhisph.2024.100850},
  URL = {https://www.documentation.ird.fr/hor/fdi:010089634},
}