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Cavity size and copper root pruning affect production and establishment of container-grown longleaf pine seedlingsAuthor(s): Mary Anne Sword Sayer; James D. Haywood; Shi-Jean Susana Sung
Source: Forest Science
Publication Series: Scientific Journal (JRNL)
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DescriptionWith six container types, we tested the effects of cavity size (i.e., 60, 93, and 170 ml) and copper root pruning on the root system development of longleaf pine (Pinus palustris Mill.) seedlings grown in a greenhouse. We then evaluated root egress during a root growth potential test and assessed seedling morphology and root system development 1 year after planting in central Louisiana, USA. Seedling size was increased by copper root pruning in small cavities but was unaffected by this treatment in larger cavities. Before planting, copper root pruning increased taproot and secondary lateral root dry weights at the expense of primary lateral root dry weight and increased root growth potential in the top 5 cm of the root plug. Across treatments, survival was 97%, and all seedlings were in the grass stage. Of the lateral root dry weight that elongated during the first year after planting, 33% more occurred in the upper 5 cm of soil when seedlings were treated with copper. Within each cavity size, copper root pruning did not affect the general morphology of 1-year-old seedlings. However, relationships between root collar diameter and root egress by depth indicated that this treatment has the potential to increase the range of cavity sizes used for seedling production.
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CitationSword Sayer, Mary Anne; Haywood, James D.; Sung, Shi-Jean Susana. 2009. Cavity size and copper root pruning affect production and establishment of container-grown longleaf pine seedlings. Forest Science. 55(5): 377-389.
Keywordscopperblock, copper oxychloride, Pinus palustris Mill., Superblock, taproot
- The persistence of container nursery treatments on the field performance and root system morphology of longleaf pine seedlings
- Longleaf Pine Root System Development and Seedling Quality in Response to Copper Root Pruning and Cavity Size
- Long-Term Container Effects on Root System Architecture of Longleaf Pine
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