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Title: An Alternative to Peat—Effects on Plant Growth, Phytochemical Accumulation, and Antioxidant Power of Spinach.
Authors: Machado, Rui. M.A.
Alves-Pereira, Isabel
Ferreira, Rui
Gruda, N.S.
Editors: Santamaria, Pietro
Keywords: soil organic matter
acidic soil
nutrient uptake
photosynthetic pigments
antioxidant activity
Spinacia oleracea
Issue Date: 2021
Publisher: MDPI
Citation: Machado, R.M.A.; Alves-Pereira, I.; Ferreira, Rui; Gruda, N.S. Coir (2021) An Alternative to Peat—Effects on Plant Growth, Phytochemical Accumulation, and Antioxidant Power of Spinach. Horticulturae 2021, 7, 127.
Abstract: In this study, we evaluated the effects of municipal solid waste compost supplemented with inorganic N on the physicochemical properties of soil, plant growth, nitrate concentration, and antioxidant activity in spinach. Experiments were carried out in neutral and acidic soils that were low in organic matter. A fertilized soil was used as a control, while four compost treatments—two compost rates of 35 and 70 t ha−1, supplemented or not with inorganic N (92 kg N ha−1 as Ca (NO3)2)—were applied by fertigation. The addition of compost increased the soil organic matter content and pH in both soils. The compost supplementation with N greatly increased the shoot dry weight and spinach fresh yield by nearly 109%. With the highest compost rate and 43% N applied, the yield increased in both soils, similar to results obtained in fertilized soil (3.8 kg m−2). The combined application of compost and N could replace inorganic P and K fertilization to a significant extent. The compost application at both rates and in both soils considerably decreased shoot Mn concentrations.
Type: article
Appears in Collections:MED - Publicações - Artigos em Revistas Internacionais Com Arbitragem Científica

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