Wood ash as a vegetative-growth promoter in soils with subsurface compaction

Author:

Bonfim-Silva Edna M.1ORCID,Martinez-Santos Tulio2ORCID,Silva Tonny J. A. da1ORCID,Alves Rackel D. de S.1ORCID,Pinheiro Everton A. R.1ORCID,Duarte Thiago F.1ORCID

Affiliation:

1. Universidade Federal de Rondonópolis, Brazil

2. Instituto Federal de Educação Ciência e Tecnologia de Mato Grosso, Brazil

Abstract

ABSTRACT Subsurface soil compaction and nutritional stress are among the main factors that limit the yield of crops. Using forest residues, such as wood ash, is a viable option in the chemical recovery of soils and can promote vigorous root development in soils with subsurface compaction. The objective of this study was to indicate the most adequate dose of wood ash for efficient management of this residue applied in rotational crops cultivated in soils with subsurface compaction. Safflower plants (Carthamus tinctorius), a rotational crop with a deep taproot system, were grown in clay soil fertilized with different doses of ash and with induced levels of compaction in the subsurface layer. The experiment was conducted in a randomized block design, under a 4 × 5 factorial scheme, composed of four doses of wood ash (8.0, 16.0, 24.0, and 32.0 g dm-3) and five levels of soil bulk density (1.0, 1.2, 1.4, 1.6, and 1.8 kg dm-3), with four replicates. Crop growth variables (plant height, number of leaves, stem diameter, and SPAD chlorophyll index) were evaluated at 15, 45, and 75 days after emergence. The results indicated that soil compaction was the most limiting factor to the vegetative development of safflower, regardless of the ash dose. The interaction between the wood ash dose and bulk density, when present, showed that the best growth response occurred for ash dose of 25 g dm-3 for a soil bulk density of 1.2 kg dm-3.

Publisher

FapUNIFESP (SciELO)

Subject

Agronomy and Crop Science,Environmental Engineering

Reference27 articles.

1. Investigation of morphoagronomic performance and selection indices in the international safflower panel for breeding perspectives;Ali F.;Turkish Journal of Agriculture and Forestry,2020

2. Application of wood ash leads to strong vertical gradients in soil pH changing prokaryotic community structure in forest top soil;Bang-Andreasen T.;Scientific Reports,2021

3. Safflower grown in different sowing dates and plant densities;Bellé R. A.;Ciência Rural,2012

4. Wood ash as corrective of soil pH and as fertilizer in ornamental sunflower cultivation;Bonfim-Silva E. M.;African Journal of Agricultural Research,2015

5. Wood ash as a corrective and fertilizer in safflower crop in Oxisol of Brazilian cerrado;Bonfim-Silva E. M.;Journal of Agricultural Science,2018

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