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- Title
Soil fertility, root growth, and Eucalypt productivity in response to lime and gypsum applications under soil water deficit.
- Authors
Mariño Macana, Yesid Alejandro; Corrêa, Robson Schaff; de Toledo, Fábio Henrique Silva Floriano; de Vicente Ferraz, Alexandre; de Oliveira Ferreira, Eric Victor; Hakamada, Rodrigo Eiji; Moreira, Gabriela Gonçalves; Arthur Junior, José Carlos; de Moraes Gonçalves, José Leonardo
- Abstract
Eucalyptus plantations in the Brazilian savanna (Cerrado) are challenged by acidic soil and water-deficit conditions. Supply of Ca and S via application of dolomitic limestone and gypsum may stimulate root development (in terms of depth) and also enhance access to water stored in the subsurface layers. Aerial and root growth, Ca2+, Mg2+, K+, and S–SO42− migration, and soil profile of Eucalyptus urophylla were evaluated following dolomitic limestone and gypsum application. Five treatments were used: (i) no application of Ca2+, Mg2+, and S–SO42− sources (CONTROL); (ii) 1200 kg ha−1 of gypsum (GYP); (iii) 2000 kg ha−1 of dolomitic limestone (DOL); (iv) DOL plus 1200 kg ha−1 of gypsum (DOL + GYP); and (v) DOL plus 2400 kg ha−1 of gypsum (DOL + 2GYP). Compared with CONTROL, Gypsum and dolomitic limestone application in DOL + 2GYP increased the concentrations of Ca2+ and Mg2+ in the soil surface and of S–SO42− in the subsurface by five, four, and three times, respectively. Fertilization with gypsum alone or in combination with dolomitic limestone did not promote an increase in fine root density (FRD) in the deeper layers. Concentrations of Ca, S, and K in the leaves increased by 16–43%. Furthermore, applying limestone 49 months after planting increased E. urophylla whole wood volume and the mean annual increment (MAI) by 8%, as compared to those in the CONTROL. Thus, gypsum and dolomitic limestone positively impacted soil fertility and may be used to acclimatize Eucalyptus to water-deficit conditions.
- Subjects
SOIL fertility; ROOT growth; SOIL moisture; EUCALYPTUS; ACID soils; ROOT development; GYPSUM; SAVANNAS
- Publication
New Forests, 2023, Vol 54, Issue 5, p833
- ISSN
0169-4286
- Publication type
Article
- DOI
10.1007/s11056-022-09943-9