EFFECT OF TAPPING DIRECTION IN RELATION TO SUN LIGHT ON GUM ARABIC<i>ACACIA SENEGAL</i>(L.) WILLD. YIELDS IN NORTH KORDOFAN STATE, SUDAN

Adam, Idris Musa; Ballal, M. E.; Fadl, Kamal Eldin Mohammed

doi:10.1080/14728028.2009.9752663

Cited by 4 publications

(4 citation statements)

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“…In Acacia Senegal (L.) Willd, oleoresin yield was up to 60% higher when tapping took place on the eastern and western sides of the tree compared to the northern and southern sides of the tree [31]. In this situation, the easter and western aspects took advantage of concentrated sunlight [33]. These researchers found that oleoresin exudation from the eastern side of trees demonstrated a more robust family effect than that of oleoresin exudation from the western side of trees.…”

Section: Discussionmentioning

confidence: 99%

“…In the summer, when sunlight is more abundant, oleoresin harvest in pines produces more oleoresin than that in winter [31]. Similarly, for acacia species, high temperature also increases oleoresin yield [32,33], with low temperatures bringing about the closure of the gum-secreting tissues [29]. In Acacia Senegal (L.) Willd, oleoresin yield was up to 60% higher when tapping took place on the eastern and western sides of the tree compared to the northern and southern sides of the tree [31].…”

Section: Discussionmentioning

confidence: 99%

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Evaluation of Aphid Resistance and Oleoresin Production in Indigenous Tropical Pine (Pinus merkusii Jungh. and de Vriese)

Purwanto¹,

Baskorowati²,

Sumantoro³

et al. 2022

Forests

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The native tropical pine (Pinus merkusii Jungh. and de Vriese) has been genetically improved in Indonesia since 1977; nevertheless, minor evaluations of aphid resistance have been conducted since 2004. As a result, a progeny test for aphid resistance was established in 2010 in Lawu, Central Java, Indonesia. Subjects in the trial were attacked significantly at the rate of 30.7% after 4 years, but surprisingly, some individuals were found to be healthy without any aphid attack. The observed a 7-year progeny trial comprised 34 families with 4 trees per unitary plot and replicated in 10 blocks. At 7 years, observations during 9 months (April–December) showed that there were differences in the range of resistance across families. The stem diameter, oleoresin production, and resistance to aphid attack were evaluated, and all traits were distinct among families except for oleoresin exudation from the western side of the stem. Five families performed above average for all three traits, while three other families had high diameter and maintained good oleoresin production. These eight families can be included in a forward selection strategy. Cluster analysis revealed that the eight best families were grouped into two of the eight clusters. Phenotypic correlations revealed that all pairs of traits were significantly related, with the highest correlation registered between stem diameter and resistance to aphid attack (0.99). Forward selection ensures the simultaneous improvement of the three traits.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Evaluation of Aphid Resistance and Oleoresin Production in Indigenous Tropical Pine (Pinus merkusii Jungh. and de Vriese)

Purwanto¹,

Baskorowati²,

Sumantoro³

et al. 2022

Forests

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“…More specifically, the investigated area was established in 1959/60 to rehabilitation of gum Arabic belt about 3150 ha. It is the biggest reserved forest of pure A. senegal "Hashab" stands in the Sudan [23], located about 30 km East of Elobeid town in North Kordofan State, in the dry region of central Sudan. North Kordofan State is located in the Sudan's dry lands, which refers to an ecological zone that is bordered by the desert region in the north and the sub-tropical dry forest in the south (Figure 1).…”

Section: Methodsmentioning

confidence: 99%

Estimating Ecological Characteristics and Carbon Stock in Uneven-Aged Plantations of <i>Acacia senegal</i> L. in the Savannah Woodlands of Sudan

Awadalla Abass,

Mubarak Khugali,

Mohammed Ahmed

et al. 2023

JEP

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The aim of this study was to assess Acacia senegal trees' characteristics as well as evaluate the carbon stock under a variety of ages in the El Demokeya forest in Sudan, where the Gum Arabic belt is located. 12 sample plots, in 2021 were randomly distributed to represent the entire area of the forest prior to the required measurements. The sample was designed as squire plots with one hectare. In each sample plot, all trees were counted, their height (m), and Diameters Breast Height (DBH in cm), respectively. The results showed the highest number of trees per ha at age 20 years old and the lowest number at age 47 years, while the highest values of DBH and volume were found at age 47 years old. As a result, the maximum and minimum values of the aboveground biomass were found in the age 47 years old and 16 years, accounting for 19.87 tons and 1.9 tons respectively. Thus, the amount of carbon stock was 11.92 tons/ha in the 35-years-old and 1.19 tons/ha in the 21-year stands. Furthermore, the average carbon stock in all plots was estimated as 18.70 tons/ha and hence the total carbon stock in the El Demokeya forest is equal to 620.11 tons. Conclusively, the characteristics of trees, amount of aboveground biomass and carbon stock in the El Demokeya forest varied among the uneven-aged plan-How to cite this paper:

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“…The application of ethephon in semi-arid North Cameroon when tapping trees is a way for enhancing gum production (Abib et al, 2013). It was also reported that the time of tapping as well as it intensity and tapping methods strongly influence gum yield by plant (Adam et al, 2009;Harmand et al, 2012;Abib et al, 2013). The needs of farmer's training about this new technology and the organization of the sector were real in order to sustain existed plantations and promote the new implementations.…”

Section: Farmer's Perception Of the Conversion Approaches And Soil Rementioning

confidence: 99%

Sandy soil fertility restoration and crops yields after conversion of long term Acacia senegal planted fallows in North Cameroon

Basga¹,

Madi²,

Balna³

et al. 2018

Afr. J. Agric. Res.

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Tree planted fallow is an agroforestry system that may restore degraded soils and protect them from erosion. In this study, sandy soils properties of Acacia senegal planted fallows (AF) were assessed and compared to those from the continuous cropped system (CC) in 3 sites from Northern Cameroon in order to determine its suitability to restore soil fertility and sustain crop productivity. Soil samples were collected from the topsoil (0 to 20 cm) and the subsoil (20 to 40 cm) and subjected to physicochemical analyses. The trials were established for 2 consecutive years, respectively with sorghum (Sorghum bicolor) and cowpea (Vigna unguiculata). Results confirmed the sandy (more than 80% of sand) and acidic (4.42 ≤ pH ≤ 6.59) soil characters. In every site, topsoil from AF was relatively more fertile than from CC. Globally, nutrients content were influenced by tree density and fallow duration. The more improved elements were organic matter, nitrogen and pH. Sorghum and cowpea yields were quite variable depending on fallow duration, tree density and conversion form. The highest crop yields (3.4 tha -1 for sorghum and 2.4 tha -1 for cowpea) were obtained in 19 years old AF converted by partial clearfelling. The intercropping process by partial clear-felling of trees was the best conversion form. Overall findings indicated that fallowing with A. senegal can reduce soil acidity, restore nutrients and therefore it constitutes a suitable agroforestry system that may sustain annual crops productivity. However, researches have to determine the best tree density for intercropping and the tools for their sustainable management.

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EFFECT OF TAPPING DIRECTION IN RELATION TO SUN LIGHT ON GUM ARABICACACIA SENEGAL(L.) WILLD. YIELDS IN NORTH KORDOFAN STATE, SUDAN

Cited by 4 publications

References 2 publications

Evaluation of Aphid Resistance and Oleoresin Production in Indigenous Tropical Pine (Pinus merkusii Jungh. and de Vriese)

Evaluation of Aphid Resistance and Oleoresin Production in Indigenous Tropical Pine (Pinus merkusii Jungh. and de Vriese)

Estimating Ecological Characteristics and Carbon Stock in Uneven-Aged Plantations of <i>Acacia senegal</i> L. in the Savannah Woodlands of Sudan

Sandy soil fertility restoration and crops yields after conversion of long term Acacia senegal planted fallows in North Cameroon

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EFFECT OF TAPPING DIRECTION IN RELATION TO SUN LIGHT ON GUM ARABICACACIA SENEGAL(L.) WILLD. YIELDS IN NORTH KORDOFAN STATE, SUDAN

Cited by 4 publications

References 2 publications

Evaluation of Aphid Resistance and Oleoresin Production in Indigenous Tropical Pine (Pinus merkusii Jungh. and de Vriese)

Evaluation of Aphid Resistance and Oleoresin Production in Indigenous Tropical Pine (Pinus merkusii Jungh. and de Vriese)

Estimating Ecological Characteristics and Carbon Stock in Uneven-Aged Plantations of &lt;i&gt;Acacia senegal&lt;/i&gt; L. in the Savannah Woodlands of Sudan

Sandy soil fertility restoration and crops yields after conversion of long term Acacia senegal planted fallows in North Cameroon

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Estimating Ecological Characteristics and Carbon Stock in Uneven-Aged Plantations of <i>Acacia senegal</i> L. in the Savannah Woodlands of Sudan