Integrated Acacia senegal-based agroforestry for sustainable agriculture and rehabilitation of degraded systems

Forskningsoutput: Kapitel i bok/rapport/konferenshandlingKonferensbidragVetenskapligPeer review

Sammanfattning

The general aim of the project is to develop models and techniques for sustainable agricultural and rehabilitation of forest production on lands that are already degraded or under the threat of degradation in the central gum belt region of the Sudan. The experiments were conducted in two contrasting sites: the sandy soils of western Sudan and the clay plains of central Sudan. The necessary equipment for taking the measurements were either provided by the local institutions or procured by the project. These include, Licor portable photosynthesis systems (Li-6400 & Li-6250), pressure chamber, neutron probe and theta probe. Soil analyses were done at the Agricultural Research Corporation (ARC) central laboratory, whereas other sophisticated measurements such as plant tissue nutrient analyses and determination of δ 13C were done in Helsinki, Finland. Experiments on the sandy soils showed the following results: • Seeds collected from trees grown on the sandy soils have shown better growth performance than those collected from trees on clay soil. • Agricultural crops have no significant effect on seedling survival and growth, however, seedlings grown with sesame performed better. • Soil working has no significant effect on seedling survival and growth. • The gum yield of farm stands, whether planted or natural, was 47 to 60% lower than that of research stands. • Late tapping reduced the gum yield by 40% and 50% at the two different locations. • The yield was highly determined by the rainfall: the yield positively correlated with the rainfall in six out of eight years. Results can be used for improving the gum arabic yield by management interventions and for predicting the yield in relation to stand type, management regime and rainfall. • Gum yield was positively correlated with tapping intensity, rainfall and the minimum and maximum temperatures at tapping time, and negatively correlated with tapping time and the minimum and maximum temperatures at gum collection
Originalspråkengelska
Titel på gästpublikationProceedings of the International Symposium for Sustainable Dryland Agriculture Systems
RedaktörerG.O Omanya, D. Pasternak
Antal sidor138
Utgivningsdatum2005
Sidor129
ISBN (tryckt)92-9066-477-0
StatusPublicerad - 2005
MoE-publikationstypA4 Artikel i en konferenspublikation

Citera det här

Elfadol, M. A., & Luukkanen, M. O. (2005). Integrated Acacia senegal-based agroforestry for sustainable agriculture and rehabilitation of degraded systems. I G. O. Omanya, & D. Pasternak (Red.), Proceedings of the International Symposium for Sustainable Dryland Agriculture Systems (s. 129)
Elfadol, Mohamed Ahmed ; Luukkanen, Martti Olavi. / Integrated Acacia senegal-based agroforestry for sustainable agriculture and rehabilitation of degraded systems. Proceedings of the International Symposium for Sustainable Dryland Agriculture Systems. redaktör / G.O Omanya ; D. Pasternak. 2005. s. 129
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title = "Integrated Acacia senegal-based agroforestry for sustainable agriculture and rehabilitation of degraded systems",
abstract = "The general aim of the project is to develop models and techniques for sustainable agricultural and rehabilitation of forest production on lands that are already degraded or under the threat of degradation in the central gum belt region of the Sudan. The experiments were conducted in two contrasting sites: the sandy soils of western Sudan and the clay plains of central Sudan. The necessary equipment for taking the measurements were either provided by the local institutions or procured by the project. These include, Licor portable photosynthesis systems (Li-6400 & Li-6250), pressure chamber, neutron probe and theta probe. Soil analyses were done at the Agricultural Research Corporation (ARC) central laboratory, whereas other sophisticated measurements such as plant tissue nutrient analyses and determination of δ 13C were done in Helsinki, Finland. Experiments on the sandy soils showed the following results: • Seeds collected from trees grown on the sandy soils have shown better growth performance than those collected from trees on clay soil. • Agricultural crops have no significant effect on seedling survival and growth, however, seedlings grown with sesame performed better. • Soil working has no significant effect on seedling survival and growth. • The gum yield of farm stands, whether planted or natural, was 47 to 60{\%} lower than that of research stands. • Late tapping reduced the gum yield by 40{\%} and 50{\%} at the two different locations. • The yield was highly determined by the rainfall: the yield positively correlated with the rainfall in six out of eight years. Results can be used for improving the gum arabic yield by management interventions and for predicting the yield in relation to stand type, management regime and rainfall. • Gum yield was positively correlated with tapping intensity, rainfall and the minimum and maximum temperatures at tapping time, and negatively correlated with tapping time and the minimum and maximum temperatures at gum collection",
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Elfadol, MA & Luukkanen, MO 2005, Integrated Acacia senegal-based agroforestry for sustainable agriculture and rehabilitation of degraded systems. i GO Omanya & D Pasternak (red), Proceedings of the International Symposium for Sustainable Dryland Agriculture Systems. s. 129.

Integrated Acacia senegal-based agroforestry for sustainable agriculture and rehabilitation of degraded systems. / Elfadol, Mohamed Ahmed; Luukkanen, Martti Olavi.

Proceedings of the International Symposium for Sustainable Dryland Agriculture Systems. red. / G.O Omanya; D. Pasternak. 2005. s. 129.

Forskningsoutput: Kapitel i bok/rapport/konferenshandlingKonferensbidragVetenskapligPeer review

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T1 - Integrated Acacia senegal-based agroforestry for sustainable agriculture and rehabilitation of degraded systems

AU - Elfadol, Mohamed Ahmed

AU - Luukkanen, Martti Olavi

N1 - Volume: Proceeding volume:

PY - 2005

Y1 - 2005

N2 - The general aim of the project is to develop models and techniques for sustainable agricultural and rehabilitation of forest production on lands that are already degraded or under the threat of degradation in the central gum belt region of the Sudan. The experiments were conducted in two contrasting sites: the sandy soils of western Sudan and the clay plains of central Sudan. The necessary equipment for taking the measurements were either provided by the local institutions or procured by the project. These include, Licor portable photosynthesis systems (Li-6400 & Li-6250), pressure chamber, neutron probe and theta probe. Soil analyses were done at the Agricultural Research Corporation (ARC) central laboratory, whereas other sophisticated measurements such as plant tissue nutrient analyses and determination of δ 13C were done in Helsinki, Finland. Experiments on the sandy soils showed the following results: • Seeds collected from trees grown on the sandy soils have shown better growth performance than those collected from trees on clay soil. • Agricultural crops have no significant effect on seedling survival and growth, however, seedlings grown with sesame performed better. • Soil working has no significant effect on seedling survival and growth. • The gum yield of farm stands, whether planted or natural, was 47 to 60% lower than that of research stands. • Late tapping reduced the gum yield by 40% and 50% at the two different locations. • The yield was highly determined by the rainfall: the yield positively correlated with the rainfall in six out of eight years. Results can be used for improving the gum arabic yield by management interventions and for predicting the yield in relation to stand type, management regime and rainfall. • Gum yield was positively correlated with tapping intensity, rainfall and the minimum and maximum temperatures at tapping time, and negatively correlated with tapping time and the minimum and maximum temperatures at gum collection

AB - The general aim of the project is to develop models and techniques for sustainable agricultural and rehabilitation of forest production on lands that are already degraded or under the threat of degradation in the central gum belt region of the Sudan. The experiments were conducted in two contrasting sites: the sandy soils of western Sudan and the clay plains of central Sudan. The necessary equipment for taking the measurements were either provided by the local institutions or procured by the project. These include, Licor portable photosynthesis systems (Li-6400 & Li-6250), pressure chamber, neutron probe and theta probe. Soil analyses were done at the Agricultural Research Corporation (ARC) central laboratory, whereas other sophisticated measurements such as plant tissue nutrient analyses and determination of δ 13C were done in Helsinki, Finland. Experiments on the sandy soils showed the following results: • Seeds collected from trees grown on the sandy soils have shown better growth performance than those collected from trees on clay soil. • Agricultural crops have no significant effect on seedling survival and growth, however, seedlings grown with sesame performed better. • Soil working has no significant effect on seedling survival and growth. • The gum yield of farm stands, whether planted or natural, was 47 to 60% lower than that of research stands. • Late tapping reduced the gum yield by 40% and 50% at the two different locations. • The yield was highly determined by the rainfall: the yield positively correlated with the rainfall in six out of eight years. Results can be used for improving the gum arabic yield by management interventions and for predicting the yield in relation to stand type, management regime and rainfall. • Gum yield was positively correlated with tapping intensity, rainfall and the minimum and maximum temperatures at tapping time, and negatively correlated with tapping time and the minimum and maximum temperatures at gum collection

UR - http://oar.icrisat.org/553/1/RA_0404.pdf

M3 - Conference contribution

SN - 92-9066-477-0

SP - 129

BT - Proceedings of the International Symposium for Sustainable Dryland Agriculture Systems

A2 - Omanya, G.O

A2 - Pasternak, D.

ER -

Elfadol MA, Luukkanen MO. Integrated Acacia senegal-based agroforestry for sustainable agriculture and rehabilitation of degraded systems. I Omanya GO, Pasternak D, redaktörer, Proceedings of the International Symposium for Sustainable Dryland Agriculture Systems. 2005. s. 129