| Sumario: | The effect of Bokashi (B, a fermented
compost), slow-release fertilizers (SRFs) and
their combined application on mycorrhizal
colonization (MC), soil invertase, cellulase,
acid (AcP) and alkaline (AlP) phosphatases
activities and maize (Zea mays L.) yield was
investigated in terrace (TS) and valley (VS) soils in
Oaxaca, Mexico. A complete randomized design,
seven fertilizer treatments and four replications
were used: unamended control (C); conventional
fertilization (90-46-00 NPK) (CF); B; SRF1
(Multigro 6®, 21-14-10 NPK); SRF2 (Multigro
3®, 24-05-14 NPK); B+SRF1; B+SRF2. Highest
root colonization percentage: CF in VS, and SRF2
in TS. Highest extraradical mycelium length: B,
B+SRF1, CF in VS, and B+SRF1 in TS. In both
soils, B increased the spore number. Highest AcP
activity: B, SRF2 in VS, and B+SRF1, B+SRF2
in TS. Highest AlP activity: B+SRF1, CF in VS,
and C in TS. Highest invertase activity: B+SRF1,
SRF2, CF in VS, and B in TS. Grain yield only
increased with B in VS. The significant interaction
soil type × fertilizer treatment for the majority of
the biological soil properties analyzed suggests
that MC and soil enzyme activity response to
fertilization was influenced by soil type. Bokashi,
alone or combined with SRFs improves biological
soil fertility in maize fields.
|
|---|
Biblioteca Digital de Vanguardia