INVESTIGADORES
FIGUEROLA Eva Lucia Margarita
artículos
Título:
Impact of diversification and intensification of crop rotation (DICR) in soil bacterial microbiota in on-farm study after four and seven years
Autor/es:
FRENE, JUAN P; FIGUEROLA, EVA L. M.; GABBARINI, LUCIANO; ERIJMAN, LEONARDO; WALL, LUIS G.
Revista:
APPLIED SOIL ECOLOGY
Editorial:
ELSEVIER SCIENCE BV
Referencias:
Lugar: Amsterdam; Año: 2022 vol. 179
ISSN:
0929-1393
Resumen:
No-till agricultural diversification and intensification of crop rotations (DICR) effects onsoil biological properties were studied in an on-farm study. DICR stands for increasingsoil cultivation period and consequent reduction of fallow times by using different winterand summer crops, including cover crops, in two and three-year rotation schemes. Fivedifferent levels of DICR were tested -typical local rotation, intermediate rotation, highintensification with grasses, high intensification with legumes, and a continuousmultispecies pasture-, and replicated at three different agricultural farms situated in theArgentinean Pampa. The soils were analyzed at four and seven years after DICRstarted. The on-farm studies were established at each site in a plot of ca. fifty hectareswith a typical local rotation history and evaluated after four and seven years ofchanges. The impact on prokaryotic soil communities was measured by 16S rRNAgene sequencing. Overall, the sustained DICR showed a progressive effect withreduced Bray-Curtis dissimilarities at second sampling. At the phylum level,Actinobacteria, Bacteroidetes, Verrucomicrobia, BCR1, and WS3 increased with thelevel of DICR while Acidobacteria, Firmicutes, Gemmatimonadetes, OD1, and TM7showed the opposite trend. Selected taxa based on LEfSe detection were associatedwith typical historical rotation after the four years and pasture after the seven years,expressing the cumulative effect of DICR. Bacterial communities structures wereassociated with plant stubble and crop yield. Understanding how more sustainablepractices such as DICR shift the soil microbiota can assist in designing agriculturalsystems that increase soil health, C sequestration, and crop yield.
