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Kwame Nkrumah University of Science and Technology (1992)

Live fencing with Newbouldia laevis, Jatropha curcas, Agave sisalana and Pithecellobium dulce (a preliminary study)

Tuffour, Isaac

Titre : Live fencing with Newbouldia laevis, Jatropha curcas, Agave sisalana and Pithecellobium dulce (a preliminary study)

Auteur : Tuffour, Isaac

Université de soutenance : Kwame Nkrumah University of Science and Technology

Grade : Master of Science in Silviculture and Forest Management, 1992

Résumé partiel
Four experiments were conducted at the Research Farm of the Institute of Renewable Natural Resources, Kumasi, Ghana (6° 43’N, 10 36’W) on four live fence species, namely ; Jatropha curcas, Pithecellobium dulce, Newbouldia laevis and Agave sisalana, to determine their response to spacing ; and on the two main methods of propagation of J. curcas and N. leavis, namely, sexual propagation and vegetative propagation, to determine their relative ease of establishment. Experiment 1 was set in a randomised complete block design (RCBD) and compared the percent germination and sprouting of J. curcas seeds and cuttings as well as the growth and survival of the seedlings and sprouts up to four months after planting. In Experiment 2, RCBD was used to compare the growth and survival of L laevis seedlings and sprouts four months after planting. Again, RCBD was used in Experiment 3 to estimate the growth and survival of A. sisalana bulbils at three different spacings, namely 20cm, 30cm and 40cm. Experiment 4 was set in a split plot design using the three species ; J. curcas, P. dulce and L. laevis as main plot treatments and within-row spacing as sub-plot treatments to find appropriate spacings for J. curcas, P. dulce and N. laevis in live fencing. Single row fence sections were used as plots in the experiments. Data collected included percent germination and sprouting (for Experiment 1), percent survival, growth in height, growth in diameter (except Experiment 3), and spread of shoot (Experiment 3). Results from Experiment 1 showed a higher percent germination and survival as well as faster growth in height, diameter and root development of L curcas seedlings than cuttings. Seedlings had 83% germination and 96.9% survival at 4 months while sprouts had 40% sprouting and 34.4% survival. Seedlings also averaged 20.1cm height growth and 1.35cm diameter growth at 2 months while sprouts had 1.2cm height growth and 0.5cm basal stem diameter. Growth of J. curcas reduced drastically after two months due to the onset of a period of drought. In Experiment 2, no significant differences (P 0.05) were found between L laevis seedlings and sprouts though seedlings had 97.2% survival, 12.5cm mean height and 0.82cm basal stem diameter at 4 months while sprouts had 44.5% survival, 11.4cm mean height and 1.16cm basal stem diameter. Experiment 3 also showed no significant difference (P 0.05) between the three spacing treatments of A. sisalana with respect to survival, height growth, shoot spread, and the number of leaves produced.

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Page publiée le 12 décembre 2013, mise à jour le 13 juillet 2018