CHANGES IN SOIL CHEMICAL ATTRIBUTES AND NUTRITION OF Anadenanthera colubrina AND Eucalyptus CLONE UNDER NATURAL FERTILIZERS AND BIOCHAR

Emmanoella Costa Guaraná Araujo,Thiago Cardoso Silva,José Antônio Aleixo Da Silva,Rinaldo Luiz Caraciolo Ferreira,Fernando José Freire

doi:10.5380/rf.v51i4.73425

Emmanoella Costa Guaraná Araujo, Thiago Cardoso Silva + Show 3 more

Open Access

https://doi.org/10.5380/rf.v51i4.73425

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Abstract

This study aimed to evaluate changes in soil chemical attributes and nutrition of Anadenanthera colubrina and a Eucalyptus clone under fertilization using reservoir sediment (RS), fish farming sediment (FFS) and biochar (BC) in the semi-arid region of Brazil. The Eucalyptus clone and A. colubrina leaves and soil were sampled after applying treatments. Leaves were collected for nutritional analysis and soil for mineral and fertility analyses. The K + and P concentration in the soil were influenced by the natural fertilizers, and the biochar increased the C content. The A. colubrina planting reduced the soil K + and P levels, and the Eucalyptus clone cultivation reduced the Mg 2+ content. The FFS was responsible for increasing P availability in both A. colubrina and the Eucalyptus clone, being a good option for use in soils which are naturally poor in P. A. colubrina presented the highest N, P, K and Ca levels, suggesting high demand of this species for these nutrients. The Eucalyptus clone was more demanding for Mg, suggesting that its cultivation should be done in soils rich in Mg 2+ . The use of RS and FFS is important to increase the growth of forest species in semi-arid regions, and this management is recommended in the deforestation policies of these regions.

Highlights

The elements circulate in nature in a constant and balanced way and the nutrients which compose the vegetal biomass generally return to the abiotic environment by senescent material falling after its fragmentation, decomposition, and mineralization
Eucalyptus clone cultivation reduced Mg+2 content and A. colubrina cultivation reduced K+ and P content of the soil, suggesting that the Eucalyptus clone is more demanding for Mg+2 and A. colubrina is more demanding for K+ and P
Soil chemical attributes The application of different sediments in the soils, including the biochar, influenced the concentration of the soils’ nutritional contents, especially for K, P and C macronutrients (Table 3)

Summary

Introduction

The elements circulate in nature in a constant and balanced way and the nutrients which compose the vegetal biomass generally return to the abiotic environment by senescent material falling after its fragmentation, decomposition, and mineralization. It is crucial to consider the content and type of nutrients, mainly in the plants’ leaf component. Knowledge on nutrient content in the phytomass and how this material returns to the soil is fundamental for adequate management of the forest production, and to help reduces costs and environmental impacts as a consequence of reducing the amount of chemical fertilization used. Forest biomass formation contributes to translocating nutrients present in the lower soil layers, being absorbed by the plants’ deep roots and returned by senescent plant material, and is essential for the natural maintenance of ecosystems (GAUTAM; MANDAL, 2018). Nutrient exportation from soils is relatively higher in regions with commercial plantations

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