Grass competition is more important than fire for suppressing encroachment of Acacia sieberiana seedlings

Plant Ecology ◽  
2020 ◽  
Author(s):  
Tiffany Pillay ◽  
David Ward
Keyword(s):  
Acacia Sieberiana

scholarly journals In VitroAntibacterial Potential of Extracts ofSterculia africana,Acacia sieberiana, andCassia abbreviatassp.abbreviataUsed by Yellow Baboons(Papio cynocephalus)for Possible Self-Medication in Mikumi National Park, Tanzania

2018 ◽  
Vol 2018 ◽  
pp. 1-6
Author(s):  
Irene Kirabo ◽  
Faith P. Mabiki ◽  
Robinson H. Mdegela ◽  
Christopher J. D. Obbo
Keyword(s):  
Staphylococcus Aureus ◽  
Antibacterial Activity ◽  
Plant Extracts ◽  
National Park ◽  
Nonhuman Primates ◽  
Diffusion Method ◽  
Root Bark ◽  
Self Medication ◽  
Gram Positive ◽  
Acacia Sieberiana

In the animals in general and nonhuman primates in particular self-medication has been widely reported; however, little is still known about the pharmacological activity of the extracts present in their daily diet. Thein vitroantibacterial activity of the stem, root bark, and leaf extracts of three selected plants on which yellow baboons feed in an unusual manner in Mikumi National Park, Tanzania, was evaluated. Crude plant extracts were tested against Gram positive and Gram negative bacteria of medical and veterinary importance employing a modified agar well diffusion method and Minimum Inhibitory Concentration (MIC) technique. The lowest MIC value for Gram positive strains was 0.31 mg/ml demonstrated byCassia abbreviatassp.abbreviataagainstStaphylococcus aureus(ATCC 25923). The highest susceptibility to the ethanol plant extracts was exhibited byPseudomonas aeruginosa,Escherichia coli,andStaphylococcus aureus,examples of microbes that affect both human and nonhuman primates. These findings demonstrate that the plant extracts fromSterculia africana,Acacia sieberiana,andCassia abbreviatassp.abbreviatahave antibacterial activity and may be used as feed for their prophylactic benefits. Remarkably, the lowest MIC of 0.16 mg/ml was only 16-fold weaker than Gentamicin, a standard drug.

Proacaciberin, A cyanogenic glycoside from Acacia sieberiana var. Woodii

1981 ◽  
Vol 20 (6) ◽  
pp. 1311-1314 ◽  
Author(s):  
Frederick Nartey ◽  
Leon Brimer ◽  
S.Brøgger Christensen
Keyword(s):  
Cyanogenic Glycoside ◽  
Acacia Sieberiana

Chance Discoveries and Germ-plasm Conservation in Tanzania: Some Observations on ‘Reserved’ Trees

1995 ◽  
Vol 22 (1) ◽  
pp. 51-55 ◽  
Author(s):  
Ladi Nshubemuki ◽  
Ancelm G. Mugasha
Keyword(s):  
Germ Plasm ◽  
Ex Situ ◽  
Subsequent Growth ◽  
Traditional Practice ◽  
Maesopsis Eminii ◽  
Acacia Sieberiana

The concept of chance discoveries — serendipity — has been examined with respect to ex situ conservation of ‘reserved’ trees in Tanzania, where selection has little regard to climatic matching. Support for such departure from traditional practice is offered by the introduction, and subsequent growth, of Maesopsis eminii Engl. in the East Usambaras, and by the growth of the dry-savanna Acacia sieberiana DC. var. sieberiana and A. seyal Del. at Lushoto, in a wetter and cooler ecozone.

scholarly journals PERFORMANCE OF BROILERS GIVEN DIFFERENT DIETARY LEVELS OF ACACIA SIEBERIANA DC. VAR. SIEBERIANA SEEDS

2021 ◽  
Vol 17 ◽  
pp. 11-16
Author(s):  
G. G. Mustapha ◽  
T. Oguntona
Keyword(s):  
Deleterious Effect ◽  
Plant Protein ◽  
Feed Consumption ◽  
Leguminous Plant ◽  
Alternative Source ◽  
Consumption Values ◽  
Higher Weights ◽  
Acacia Sieberiana

The study was aimed at evaluating the seeds of a leguminous plant, Acacia sieberiana DC as an alternative source of dietary plant protein for broilers. Five experimental diets containing 0 (control), 5, 10, 15 and 20% Acacia sieberiana seeds (ASS) were formulated and fed to 5 groups of birds during starter (0 - 4 weeks), grower (5 - 8 weeks) and finisher (9-12 weeks) periods respectively. There were 3 replicates per treatment, with 10 birds per replicate. At the end of the experiment, average weekly liveweight gains of 128.90 ±24.17, 122.68±25.09, 112.79 ± 22.83, 96.40 ± 21.53 and 99.56 + 21.53g were obtained for the birds on 0, 5, 10 and 20% ASS inclusion respectively. The average weekly feed consumption values were 413.47 ± 63.63, 408.59 ± 63.82, 304.60 ± 61.70, 347.96 ± 58.0 and 352.83 ± 59.76g for the birds on 0, 5, 10, 15 and 20% ASS respectively. The feed efficiencies were 0.289 ± 0.03, 0.272± 0.03, 0.264 + 0.03, 0.248 ± 0.03 and 0.253 ± 0.03 for the birds on 0. 5. 10. 15 and 20% ASS respectively. The data revealed that in general, the birds on 0, 5 and 10% ASS inclusion performed better (PÇ<.05) than birds on 15 or 20% ASS. Results of carcass evaluation show that the gizzard, lungs and heads of the control birds had significantly (PÇ<.05) higher weights than those of birds on 15 and 20% ASS. From these results it can be concluded that up to 10% ASS could be incorporated into poultry diet without deleterious effect on broilers.

Effects of heat and fire on the germination of Acacia sieberiana D.C. and Acacia gerrardii Benth. in Uganda

1996 ◽  
Vol 12 (1) ◽  
pp. 1-10 ◽  
Author(s):  
Patrick Mucunguzi ◽  
Hannington Oryem-Origa
Keyword(s):  
Heat Treatment ◽  
Seed Germination ◽  
Prolonged Exposure ◽  
Seedling Emergence ◽  
Seed Viability ◽  
Short Exposure ◽  
Dry Heat ◽  
Acacia Gerrardii ◽  
Depth Of Burial ◽  
Acacia Sieberiana

ABSTRACTThe effects of heat treatment and fire on seed germination of Acacia sieberiana D.C. and Acacia gerrardii Benth. were studied. Dry heat and fire were studied separately. Seeds treated with dry heat were set to germinate in petri-dishes under laboratory conditions. Other seeds were planted in plots at the Uganda Institute of Ecology, Mweya, which were then burnt, and subsequent seedling emergence was monitored. The effect of heat treatment on seed germination depended on heat intensity and duration of exposure. Higher intensities reduced the germination capacity of Acacia seeds. Short exposure of seeds stimulated germination but prolonged exposure rapidly reduced seed viability. A. sieberiana had a higher heat resistance than A. gerrardii. The survival and germination of seeds after fire increased with depth of burial and A. sieberiana survived better than A. gerrardii. The germinability of seeds of A. gerrardii was not significantly increased by fire.

scholarly journals Evaluating the Nutritional Potential of Acacia Sieberiana Seeds (Dc) Growing In North West of Nigeria

2014 ◽  
Vol 5 (2) ◽  
pp. 25 ◽  
Author(s):  
Abubakar Salisu ◽  
Godwin H. Ogbadu ◽  
Paul C. Onyenekwe ◽  
Omotoye Olorode ◽  
Rebecca W. Ndana ◽  
...  
Keyword(s):  
Crude Protein ◽  
Toxic Elements ◽  
Critical Value ◽  
Crude Protein Content ◽  
Alternative Source ◽  
North West ◽  
Spss Software ◽  
Alternative Sources ◽  
Nutritional Potential ◽  
Acacia Sieberiana

Concerted efforts in search of alternative sources of protein has grown due to dearth of animal protein in developing countries, as  food shortage and poverty become more endemic, people increasingly depend on plants rather than animals for proteins in their diets. This work focuses on untapped indigenous wild savannah tree, Acacia sieberiana (seeds) for its nutritional and economical values. The seeds were collected and processed for proximate compositions, phytochemicals and elemental analysis. The high percentage of crude protein content of 49.7% and absence of toxic elements such as Cadmium (Cd), Arsenic (Ar), and very low percentage of Lead (Pb) 0.001ml/g has proven that the Acacia sieberiana seeds are very safe and could serve as an alternative source of protein. The result of the quantitative minerals determination shows the presence of Manganese (3.93mg/g), Calcium (2.02mg/g), and Iron (0.11mg/g). The germination trials of the seeds were also carried out, and the result shows that, soaking, heating the seeds at 600C and even the non treated seeds as well as those planted and mulched gave promising results of the plant’s seeds germination. The statistical package for social science (SPSS) software was used to analysed the significant differences between the treatments at critical value (p≥0.05).

Dihydroacacipetalin–a new cyanogenic glucoside from Acacia sieberiana var. Woodii

1975 ◽  
Vol 14 (5-6) ◽  
pp. 1419-1420 ◽  
Author(s):  
David S. Seigler ◽  
Charles S. Butterfield ◽  
John E. Dunn ◽  
Eric E. Conn
Keyword(s):  
Cyanogenic Glucoside ◽  
Acacia Sieberiana

scholarly journals Acacia sieberiana Effects on Soil Properties and Plant Diversity in Songa Pastures, Rwanda

2013 ◽  
Vol 2013 ◽  
pp. 1-11 ◽  
Author(s):  
C. P. Mugunga ◽  
D. T. Mugumo
Keyword(s):  
Soil Properties ◽  
Plant Diversity ◽  
Diversity Index ◽  
Exchange Capacity ◽  
Crown Architecture ◽  
Tree Leaves ◽  
Tree Crowns ◽  
Tree Canopies ◽  
Acacia Sieberiana ◽  
Tree Characteristics

Effects of A. sieberiana trees on soil properties and plant diversity were investigated in Songa pastures, Rwanda. Tree characteristics and crown architecture of A. sieberiana were studied. Soil properties were assessed and plants were identified under and away from tree crowns. Counts of individual plants/species were done only under tree crowns. Nitrogen, P, and K were analysed in the soil, grass, and A. sieberiana leaves. Plant diversity was determined using Simpson's diversity index. Data were subjected to ANOVA. Soil organic carbon (SOC), cation exchange capacity (CEC), Ca2+, N and pH, and plant diversity were higher in soils under tree canopies than in open areas. Tree leaves were significantly richer in N and poorer in P and K as compared to grasses. Tree crowns grew wider and horizontal and developed intertwined secondary branching, reducing light intensity to as low as 38% under tree canopies compared to the open pasture. At 3 trees/ha stocking, A. sieberiana trees shaded 0.18 ha and herbaceous plants and grasses unpalatable to livestock dominated under tree canopies. A tradeoff of A. sieberiana tree value versus the loss of palatable grass due to tree presence needs to be assessed to decide whether the trees should be included in pastures and if yes, the apporpriate stocking identified.

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