Rice Hulls and Anaerobic Digestion Residues as Substrate Components for Potted Production of Geranium and Rose
| Autor: | Antonio Bassan, Paolo Sambo, Stefano Bona, Carlo Nicoletto, Giampaolo Zanin |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
PCA analysis Pelargonium peltatum peat alternatives 01 natural sciences lcsh:Agriculture Ground rice hulls Multiple regression PCA analysis Peat alternatives Whole rice hulls Nutrient Ornamental plant Cation-exchange capacity biology multiple regression Chemistry lcsh:S Substrate (chemistry) 04 agricultural and veterinary sciences biology.organism_classification Rice hulls ground rice hulls Anaerobic digestion Horticulture whole rice hulls Geranium 040103 agronomy & agriculture 0401 agriculture forestry and fisheries Agronomy and Crop Science 010606 plant biology & botany |
| Zdroj: | Agronomy Volume 10 Issue 7 Agronomy, Vol 10, Iss 950, p 950 (2020) |
| ISSN: | 2073-4395 |
| DOI: | 10.3390/agronomy10070950 |
| Popis: | Economic and environmental concerns limit peat use for substrate production, promoting interest in alternative materials. Hence, in this study, 16 substrates were obtained by mixing, in a factorial combination, eight substrates with different ratios of peat, rice hulls (RH), and anaerobic digestion residues (ADR) and two types of RH: whole (WRH) or ground RH (GRH). Substrates were physically and chemically characterized and then tested as potting substrates for Pelargonium peltatum &lsquo Ville de Paris&rsquo and Rosa × hybrida &lsquo La Sevillana&rsquo production. Physical characteristics worsened the increasing RH content. This problem was partly solved using GRH and adding ADR to the substrates. As for chemical characteristics, RH increased P and K, reducing cation exchange capacity, NO3-N, and Ca, thus causing a possible nutritional imbalance. ADR addition increased all nutrients, restoring the nutritional balance. Geranium and rose plants were negatively affected by an increasing rate of RH. In both species, the use of GRH improved the considered parameters, whereas ADR improved some parameters but only in geranium. It was possible to partly substitute peat with 33% RH, but GRH plus ADR is necessary for geranium production, and facultative for rose. The multiple regression method and principal component analysis appear to be useful tools to understand which substrate parameters, and to what extent, influence the growth of ornamental plants. |
| Databáze: | OpenAIRE |
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