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Effect of soil types, soil pasteurisation and inoculation on the growth of Colophospermum Mopane families : a nursery study

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dc.contributor.author Hangula RJK en
dc.date.accessioned 2016-09-22T08:40:38Z
dc.date.available 2016-09-22T08:40:38Z
dc.date.submitted 1998 en
dc.identifier.uri http://hdl.handle.net/20.500.11892/39782
dc.description.abstract Genetic information and nursery behaviour, of Colophospermum mopane is needed for breeding and improvement purposes. A nursery study with 18 C. mopane families from Namibia, and one seedlot each from Botswana and Zambia was done for eight months. The objectives of the study were to determine family variability, the effect of different soil types, soil pasteurisation and inoculation at two levels each on the growth of C. mopane. A factorial design, and Randomised Complete Block (RGB) layout was used. Variation in seed traits using a 40-seed sample per family and germination capacity were also measured among families including the Botswana and Zambia seedlots. There was significant difference in seed characteristics. Germination percentages varied between zero and 65 % and there was no significant correlation between seed size and germination percentage. Analysis of variance showed a significant family variation for height as a measure of early growth, number of leaves and for root collar diameter measured at two, four and eight months. As expected, the red heavy clay had the highest mean seedling height compared to the black sand, and seedlings grew better in it, even in combination with other soil treatments. Non-pasteurised soil had a higher mean height growth irrespective of soil types than pasteurised soil. Soil inoculation had a significant positive effect on the height growth of C. mopane seedlings at two, four and eight months, but seemed not to have the same effect on the root growth. On external root inspection, no nodules were found. A small sample of families was selected for root study on the basis of shoot height performance at eight months, in the two soil types, inoculated and uninoculated, ignoring pasteurisation treatment. Shoot and root dry mass and root:shoot ratio of the selected families were determined. There were no significant differences between the total mean root dry mass as opposed to mean shoot dry mass among families. The root:shoot ratio varied significantly among families. The results indicated early growth variations in C. mopane families at nursery level, and differences in responses to soil types and treatments applied. Therefore there is a need for more detailed genetic studies with mopane across its natural range, both at early growth and later when planted in the field to correlate and complement responses. en
dc.language English en
dc.subject Forest science en
dc.title Effect of soil types, soil pasteurisation and inoculation on the growth of Colophospermum Mopane families : a nursery study en
dc.type Masters degree en
dc.description.degree MSc en

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