Organic compounds with high Ni content: Effects on soil and strawberry production

ABSTRACT The use of organic residues can improve soil chemical and physical conditions and plant growth. However, these residues often contain heavy metals that can interfere with growth. Here, a pot experiment was performed to compare the effects of organic compound (OC) containing a high nickel (N...

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Published in:Revista brasileira de engenharia agrícola e ambiental 2016-08, Vol.20 (8), p.722-727
Main Authors: Roveda, Luis F, Cuquel, Francine L, Motta, Antonio C.V, de F. Melo, Vander
Format: Article
Language:eng ; spa ; por
Subjects:
AGRICULTURAL ENGINEERING
ENVIRONMENTAL SCIENCES
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Summary:ABSTRACT The use of organic residues can improve soil chemical and physical conditions and plant growth. However, these residues often contain heavy metals that can interfere with growth. Here, a pot experiment was performed to compare the effects of organic compound (OC) containing a high nickel (Ni) load with those of a mineral Ni source (NiCl2, a soluble salt) on the production, quality and nutritional status of strawberry and on soil chemistry. Six dosages of Ni (0, 9, 18, 36, 72 and 144 mg kg-1) were added to the soil using both OC and NiCl2. The use of high-Ni OC resulted in increased productivity and fruit weight, whereas the soluble NiCl2 salt caused reduction in fruit weight. Application of NiCl2 at concentrations >18 mg kg-1 also caused internerval chlorosis on leaves, suggesting that strawberry is highly sensitive to Ni. The mineral Ni source was almost 15-fold more effective than the organic source at increasing leaf Ni content. Application of OC caused an increase of organic matter, Ca, sum of bases, cation exchange capacity, base saturation, Zn, Mn, and Cu, but reduced the levels of Mg in soil. RESUMO O uso de resíduos orgânicos pode promover não apenas melhorias nas condições químicas e físicas do solo e da planta mas também a entrada de metais pesados no ciclo biológico. Objetivando avaliar o efeito de um composto orgânico (CO) com altos teores de níquel (Ni) e do cloreto de Ni na produção, qualidade, nutrição do morango e nos aspectos químicos do solo, conduziu-se um experimento em vasos. Aplicaram-se seis doses de Ni 0, 9, 18, 36, 72 e 144 mg Ni kg-1 de solo por meio de um CO e um sal solúvel. Avaliaram-se os efeitos na produtividade, qualidade de frutos e composição química (macro e micronutrientes) em tecido da planta tal como efeitos no solo. A aplicação de CO com altos teores de Ni proporcionou aumentos na produção e massa de frutos, porém o uso isolado exerceu decréscimos na massa dos frutos; já na fonte mineral e nas maiores doses provocou clorose internerval nas folhas. A cultura do morango mostrou alta sensibilidade nas maiores concentrações de Ni; enfim, o CO promoveu incrementos de MO, Ca, soma de bases, CTC, saturação de base, Zn, Mn e Fe mas reduziu os teores de Mg.
ISSN:1415-4366
1807-1929
1415-4366
1807-1929
DOI:10.1590/1807-1929/agriambi.v20n8p722-727