Microbial enzymatic stoichiometry and the acquisition of C, N, and P in soils under different land-use types in Brazilian semiarid

2023

Article référencé dans le Web of Science WOS:000913483100001

de Medeiros E. V., Silva E. D., Duda G. P., Lira M. A., dos Santos U. J., Hammecker Claude, da Costa D. P., Araujo F. F., Pereira A. P. D., Mendes L. W., Araujo A. S. F.

Soil Ecology Letters, 2023, 5 (3), p. 220159 [8 p.] ISSN 2662-2289

? The enzymatic stoichiometry varied between land-use in both soil depth.? The values of C-and N-acquiring enzymes were higher at 0-5 cm depth.? Soils under different land-use types in the Brazilian semiarid are P-limited.This study hypothesized that different land-use affect the microbial enzymatic stoichiometry and C-, N-, and P-acquisition in Brazilian semiarid soils. Thus, the enzymes beta-glucosidase (C-acquiring enzyme), urease (N-acquiring enzyme), and acid phosphatase (P-acquiring enzyme) were assessed in soil samples collected at 0-5 and 5-10 cm depth from a tropical dry forest, a protected area with Angico, a protected area with Ipe, scrub area, and an agricultural area with maize. The values of C-, N-, and P-acquiring enzymes were used to calculate the enzymatic C:N, C:P, and N:P ratios. The values of C:P and N:P ratios were higher at 0-5 cm depth, while no significant variation, between soil depth, was observed for C:N ratio. The values of C-and N-acquiring enzymes were higher at 0-5 cm in tropical dry forest areas and Angico forest, respectively. In all land use types, the values of vectors L and A were higher than 1 degrees and 45 degrees, respectively. This study showed that both land-use and soil depth influence the enzymatic stoichiometry, showing higher values of C-and N-acquiring enzymes in native and protected forests at soil surface.

Pédologie [068] ; Etudes, transformation, conservation du milieu naturel [082]

BRESIL ; ZONE SEMIARIDE ; PERNAMBUCO

Fonds IRD [F B010086849]

fdi:010086849