n Southern African Forestry Journal - Shoot morphology and site climate affect re-establishment success of Pinus patula in South Africa : scientific paper
|Article Title||Shoot morphology and site climate affect re-establishment success of Pinus patula in South Africa : scientific paper|
|© Publisher:||South African Institute of Forestry (SAIF)|
|Journal||Southern African Forestry Journal|
|Author||R.G. Mitchell, J. Zwolinski and N.B. Jones|
|Publication Date||Nov 2005|
|Pages||13 - 20|
|Keyword(s)||Cotyledon number, Cuttings, Height, Root collar diameter, Seedlings, Sturdiness ratio and Survival|
Operational experience has indicated that <I> Pinus patula</I> generally survives poorly on sub-optimal growing sites in South Africa, particularly when planted as cuttings. This observation will become increasingly important as softwood species of genetically selected stock are deployed as cuttings in preference to seedlings of lower genetic value. Methods to improve survival of this species are yet to be fully defined. Production of <I>P. patula</I> seedlings is currently based on broad prescriptions, which commonly include raising containerised stock for 5 to 7 months in the nursery and limiting planting to the early and late summer months. Little research has been conducted on determining optimal plant dimensions at planting or defining sites that are of high or low planting risk. This paper describes some effects of site climate and shoot morphology on post-planting survival and is the first to provide suggested guideline dimensions for <I>P. patula</I> cutting and seedling nursery stock raised in containers, 80 - 90 ml in volume. Further work is required to establish the validity of these dimensions.
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