Spatial distribution ofMalusroot systems in irrigated, trellised orchards
| Autor: | N. David Appel, T. Wesley Watson, M. Charles Kenerley, A. Michael Arnold |
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| Rok vydání: | 2006 |
| Předmět: | |
| Zdroj: | The Journal of Horticultural Science and Biotechnology. 81:745-753 |
| ISSN: | 2380-4084 1462-0316 |
| Popis: | SummaryRoot distribution was determined for apple trees [Malus sylvestris (L.) Mill. var. domestica (Borkh.) Mansf. ‘Fuji’/’M.26’ (syn. M. domestica Borkh. non Poir.)] 1, 2 and 3 years after planting in trellised orchards in central Texas. Using a soil-coring method, measurable differences were detected in root-length density (RLD; root length per unit volume of soil) by tree age, soil depth, radial distance from the tree, and spatial bearing within and across rows (P ≤ 0.05). For fine roots (root diameters < 1 mm), mean RLD values were 0.1028, 0.1139 and 0.2911 cm cm–3 for 1, 2 and 3 year-old plantings, respectively. For coarse roots (root diameters 1–5 mm), mean RLD values were 0.0006, 0.0009 and 0.0015 cm cm–3 for 1, 2 and 3 year-old plantings, respectively. Mean RLD values declined for both fine and coarse roots of all ages with increasing soil depth and radial distance from the trunk (P ≤ 0.05). Similar patterns were observed for the number of soil cores containing measurable roots. The percentage of... |
| Databáze: | OpenAIRE |
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