ISHS Acta Horticulturae 567: IV International Strawberry Symposium
EFFECTS OF ORGANIC RESIDUES ON STRAWBERRY ROOT GROWTH |
| Authors: | D. Neri, N. Sugiyama, A. Inujima |
| Keywords: | Fragaria x ananassa, allelopathy, rhizotrone, root physiology |
| DOI: | 10.17660/ActaHortic.2002.567.107 |
| Abstract:
Strawberry is often replanted in the same field as a single crop or in short rotation cycles causing a progressively deterioration of the soil. The objective of the present study was to clarify the growth response of strawberry roots to increasing amounts of strawberry residues. Observation boxes were built with glass windows and filled with commercial compost. In order to simulate the soil accumulation of strawberry plant residues, a 3-cm layer with a residue concentration ranging from 0 to 100% was prepared at 15 cm from the soil surface. Root growth was reduced by the presence of the residues in a different way during the 3-weeks observation period. In the first week, the lowest growth was found with 30% residue. After the primary roots entered the layer containing the residue (second week), root growth was most reduced with 100% residue. However, primary roots showed only a slight or no dimorphism when they encountered the residue layer. The 3% dose did not reduce root growth as compared to control. When 30 and 100% of residues were applied, the above-soil plant growth was also negatively affected. Results indicate that strawberry residues at high doses (10 to 100%) inhibited both primary and secondary root growth and changed root dynamics in the substrate, perhaps a result of phytotoxicity. | |
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