High rates of gasified rice hull biochar affect geranium and tomato growth in a soilless substrate
| Autor: | James C. Locke, James E. Altland |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
0106 biological sciences
biology Physiology Chemistry 04 agricultural and veterinary sciences Pelargonium biology.organism_classification Rice hulls 01 natural sciences Crop Agronomy Geranium Shoot Biochar 040103 agronomy & agriculture 0401 agriculture forestry and fisheries Floriculture Solanum Agronomy and Crop Science 010606 plant biology & botany |
| Zdroj: | Journal of Plant Nutrition. 40:1816-1828 |
| ISSN: | 1532-4087 0190-4167 |
| DOI: | 10.1080/01904167.2016.1249800 |
| Popis: | Gasified rice hull biochar (GRHB) is a byproduct of rice production, where rice hulls are gasified to generate energy for other aspects of rice processing. Other research has shown that GRHB up to 10% (v/v) in a soilless substrate can provide much, but not all, of a potted floriculture crops’ phosphorus and potassium needs. The objective of this research was to determine the effect of higher GRHB rates on floriculture crop nutrition and growth. Two experiments were conducted with GRHB rates ranging from 0% to 30% (v/v) of a soilless peatmoss-based substrate. Geranium (Pelargonium ×hortorum ‘Maverick Red’) and tomato (Solanum lycopersicum ‘Megabite’) were grown in 10-cm diameter pots with amended substrates. Addition of GRHB up to 30% affected the physical properties of the peatmoss-based substrate by increasing container capacity (CC) and decreasing unavailable water (UAW). Summarizing across the two experiments, amending a peatmoss substrate with 15% and 20% GRHB provided sufficient P and K for production of geranium and tomato in soilless substrates over a 5 to 6 week production cycle. However, GRHB did not provide a sufficient source of micronutrients to support acceptable crop growth. Geranium responded negatively to high rates (>10%) with reduced shoot and root growth, while tomato responded positively to higher rates with increased shoot growth. Higher rates of GRHB (>10%) can be recommended for some crops, but not all. |
| Databáze: | OpenAIRE |
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