Evolution of soil chemical properties in the rotational agroforestry system with Acacia auriculiformis during 22 years, DRC
To produce charcoal and prevent the deforestation around Kinshasa (Gond et al., 2017), 7,700 ha of Acacia auriculiformis were planted on savannah ecosystems, in 1987 (Bateke Plateau, DR Congo). Since 1995, the plantation was managed using the rotational woodlot system alternating agricultural and charcoal production on the same area (Kimaro et al., 2007). The 7,700 ha produced a large amounts of charcoal, cassava and maize during many years (Bisiaux et al., 2009). However, farmers have observed for a while a decline in wood and crop productivity. The aim of this study was to compare chemical properties of soils in six acacia stands in two farms having undergone different agroforestry trajectories: - one 22-year-old acacia stand, never-harvested; 4 stands in their 2nd rotation after 1 cropping cycle; and 1 stand in its 3rd rotation after 2 cropping cycles - and soils in the native control savannah. Compared to the original savannah, all acacia stands showed an increase in soil C, N and N-NO3- contents, but a decline in soil pH and exchangeable cations, and an increase in exchangeable Al and CEC (Fig 1). To maintain the sustainability of the system, we recommend different practices in order to improve the nutrient balance and decrease the soil acidity. Such practices are the debarking of tree stems before carbonization, the restitution of small branches and charcoal residues to the soil, and the supply of natural rock phosphate (Dubiez et al., 2018).
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Subjects: | K10 - Production forestière, P06 - Sources d'énergie renouvelable, F08 - Systèmes et modes de culture, P35 - Fertilité du sol, déboisement, charbon de bois, reconstitution forestière, Acacia auriculiformis, savane, culture itinérante, http://aims.fao.org/aos/agrovoc/c_15590, http://aims.fao.org/aos/agrovoc/c_1503, http://aims.fao.org/aos/agrovoc/c_13802, http://aims.fao.org/aos/agrovoc/c_35, http://aims.fao.org/aos/agrovoc/c_6825, http://aims.fao.org/aos/agrovoc/c_7038, http://aims.fao.org/aos/agrovoc/c_8500, |
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dig-cirad-fr-5927182024-01-29T02:02:20Z http://agritrop.cirad.fr/592718/ http://agritrop.cirad.fr/592718/ Evolution of soil chemical properties in the rotational agroforestry system with Acacia auriculiformis during 22 years, DRC. Dubiez Emilien, Freycon Vincent, Marien Jean-Noël, Peltier Régis, Harmand Jean-Michel. 2019. In : 4th World Congress on Agroforestry. Book of abstracts. Dupraz Christian (ed.), Gosme Marie (ed.), Lawson Gerry (ed.). CIRAD, INRA, World Agroforestry, Agropolis International, MUSE. Montpellier : CIRAD-INRA, Résumé, p. 348. World Congress on Agroforestry. 4, Montpellier, France, 20 Mai 2019/22 Mai 2019.https://agroforestry2019.cirad.fr/news-press <https://agroforestry2019.cirad.fr/news-press> Evolution of soil chemical properties in the rotational agroforestry system with Acacia auriculiformis during 22 years, DRC Dubiez, Emilien Freycon, Vincent Marien, Jean-Noël Peltier, Régis Harmand, Jean-Michel eng 2019 CIRAD 4th World Congress on Agroforestry. Book of abstracts K10 - Production forestière P06 - Sources d'énergie renouvelable F08 - Systèmes et modes de culture P35 - Fertilité du sol déboisement charbon de bois reconstitution forestière Acacia auriculiformis savane culture itinérante http://aims.fao.org/aos/agrovoc/c_15590 http://aims.fao.org/aos/agrovoc/c_1503 http://aims.fao.org/aos/agrovoc/c_13802 http://aims.fao.org/aos/agrovoc/c_35 http://aims.fao.org/aos/agrovoc/c_6825 http://aims.fao.org/aos/agrovoc/c_7038 République démocratique du Congo http://aims.fao.org/aos/agrovoc/c_8500 To produce charcoal and prevent the deforestation around Kinshasa (Gond et al., 2017), 7,700 ha of Acacia auriculiformis were planted on savannah ecosystems, in 1987 (Bateke Plateau, DR Congo). Since 1995, the plantation was managed using the rotational woodlot system alternating agricultural and charcoal production on the same area (Kimaro et al., 2007). The 7,700 ha produced a large amounts of charcoal, cassava and maize during many years (Bisiaux et al., 2009). However, farmers have observed for a while a decline in wood and crop productivity. The aim of this study was to compare chemical properties of soils in six acacia stands in two farms having undergone different agroforestry trajectories: - one 22-year-old acacia stand, never-harvested; 4 stands in their 2nd rotation after 1 cropping cycle; and 1 stand in its 3rd rotation after 2 cropping cycles - and soils in the native control savannah. Compared to the original savannah, all acacia stands showed an increase in soil C, N and N-NO3- contents, but a decline in soil pH and exchangeable cations, and an increase in exchangeable Al and CEC (Fig 1). To maintain the sustainability of the system, we recommend different practices in order to improve the nutrient balance and decrease the soil acidity. Such practices are the debarking of tree stems before carbonization, the restitution of small branches and charcoal residues to the soil, and the supply of natural rock phosphate (Dubiez et al., 2018). conference_item info:eu-repo/semantics/conferenceObject Conference info:eu-repo/semantics/publishedVersion http://agritrop.cirad.fr/592718/7/ID592718.pdf text Cirad license info:eu-repo/semantics/openAccess https://agritrop.cirad.fr/mention_legale.html https://agroforestry2019.cirad.fr/news-press http://agritrop.cirad.fr/592794/ info:eu-repo/semantics/altIdentifier/purl/https://agroforestry2019.cirad.fr/news-press |
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K10 - Production forestière P06 - Sources d'énergie renouvelable F08 - Systèmes et modes de culture P35 - Fertilité du sol déboisement charbon de bois reconstitution forestière Acacia auriculiformis savane culture itinérante http://aims.fao.org/aos/agrovoc/c_15590 http://aims.fao.org/aos/agrovoc/c_1503 http://aims.fao.org/aos/agrovoc/c_13802 http://aims.fao.org/aos/agrovoc/c_35 http://aims.fao.org/aos/agrovoc/c_6825 http://aims.fao.org/aos/agrovoc/c_7038 http://aims.fao.org/aos/agrovoc/c_8500 K10 - Production forestière P06 - Sources d'énergie renouvelable F08 - Systèmes et modes de culture P35 - Fertilité du sol déboisement charbon de bois reconstitution forestière Acacia auriculiformis savane culture itinérante http://aims.fao.org/aos/agrovoc/c_15590 http://aims.fao.org/aos/agrovoc/c_1503 http://aims.fao.org/aos/agrovoc/c_13802 http://aims.fao.org/aos/agrovoc/c_35 http://aims.fao.org/aos/agrovoc/c_6825 http://aims.fao.org/aos/agrovoc/c_7038 http://aims.fao.org/aos/agrovoc/c_8500 |
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K10 - Production forestière P06 - Sources d'énergie renouvelable F08 - Systèmes et modes de culture P35 - Fertilité du sol déboisement charbon de bois reconstitution forestière Acacia auriculiformis savane culture itinérante http://aims.fao.org/aos/agrovoc/c_15590 http://aims.fao.org/aos/agrovoc/c_1503 http://aims.fao.org/aos/agrovoc/c_13802 http://aims.fao.org/aos/agrovoc/c_35 http://aims.fao.org/aos/agrovoc/c_6825 http://aims.fao.org/aos/agrovoc/c_7038 http://aims.fao.org/aos/agrovoc/c_8500 K10 - Production forestière P06 - Sources d'énergie renouvelable F08 - Systèmes et modes de culture P35 - Fertilité du sol déboisement charbon de bois reconstitution forestière Acacia auriculiformis savane culture itinérante http://aims.fao.org/aos/agrovoc/c_15590 http://aims.fao.org/aos/agrovoc/c_1503 http://aims.fao.org/aos/agrovoc/c_13802 http://aims.fao.org/aos/agrovoc/c_35 http://aims.fao.org/aos/agrovoc/c_6825 http://aims.fao.org/aos/agrovoc/c_7038 http://aims.fao.org/aos/agrovoc/c_8500 Dubiez, Emilien Freycon, Vincent Marien, Jean-Noël Peltier, Régis Harmand, Jean-Michel Evolution of soil chemical properties in the rotational agroforestry system with Acacia auriculiformis during 22 years, DRC |
description |
To produce charcoal and prevent the deforestation around Kinshasa (Gond et al., 2017), 7,700 ha of Acacia auriculiformis were planted on savannah ecosystems, in 1987 (Bateke Plateau, DR Congo). Since 1995, the plantation was managed using the rotational woodlot system alternating agricultural and charcoal production on the same area (Kimaro et al., 2007). The 7,700 ha produced a large amounts of charcoal, cassava and maize during many years (Bisiaux et al., 2009). However, farmers have observed for a while a decline in wood and crop productivity. The aim of this study was to compare chemical properties of soils in six acacia stands in two farms having undergone different agroforestry trajectories: - one 22-year-old acacia stand, never-harvested; 4 stands in their 2nd rotation after 1 cropping cycle; and 1 stand in its 3rd rotation after 2 cropping cycles - and soils in the native control savannah. Compared to the original savannah, all acacia stands showed an increase in soil C, N and N-NO3- contents, but a decline in soil pH and exchangeable cations, and an increase in exchangeable Al and CEC (Fig 1). To maintain the sustainability of the system, we recommend different practices in order to improve the nutrient balance and decrease the soil acidity. Such practices are the debarking of tree stems before carbonization, the restitution of small branches and charcoal residues to the soil, and the supply of natural rock phosphate (Dubiez et al., 2018). |
format |
conference_item |
topic_facet |
K10 - Production forestière P06 - Sources d'énergie renouvelable F08 - Systèmes et modes de culture P35 - Fertilité du sol déboisement charbon de bois reconstitution forestière Acacia auriculiformis savane culture itinérante http://aims.fao.org/aos/agrovoc/c_15590 http://aims.fao.org/aos/agrovoc/c_1503 http://aims.fao.org/aos/agrovoc/c_13802 http://aims.fao.org/aos/agrovoc/c_35 http://aims.fao.org/aos/agrovoc/c_6825 http://aims.fao.org/aos/agrovoc/c_7038 http://aims.fao.org/aos/agrovoc/c_8500 |
author |
Dubiez, Emilien Freycon, Vincent Marien, Jean-Noël Peltier, Régis Harmand, Jean-Michel |
author_facet |
Dubiez, Emilien Freycon, Vincent Marien, Jean-Noël Peltier, Régis Harmand, Jean-Michel |
author_sort |
Dubiez, Emilien |
title |
Evolution of soil chemical properties in the rotational agroforestry system with Acacia auriculiformis during 22 years, DRC |
title_short |
Evolution of soil chemical properties in the rotational agroforestry system with Acacia auriculiformis during 22 years, DRC |
title_full |
Evolution of soil chemical properties in the rotational agroforestry system with Acacia auriculiformis during 22 years, DRC |
title_fullStr |
Evolution of soil chemical properties in the rotational agroforestry system with Acacia auriculiformis during 22 years, DRC |
title_full_unstemmed |
Evolution of soil chemical properties in the rotational agroforestry system with Acacia auriculiformis during 22 years, DRC |
title_sort |
evolution of soil chemical properties in the rotational agroforestry system with acacia auriculiformis during 22 years, drc |
publisher |
CIRAD |
url |
http://agritrop.cirad.fr/592718/ http://agritrop.cirad.fr/592718/7/ID592718.pdf |
work_keys_str_mv |
AT dubiezemilien evolutionofsoilchemicalpropertiesintherotationalagroforestrysystemwithacaciaauriculiformisduring22yearsdrc AT freyconvincent evolutionofsoilchemicalpropertiesintherotationalagroforestrysystemwithacaciaauriculiformisduring22yearsdrc AT marienjeannoel evolutionofsoilchemicalpropertiesintherotationalagroforestrysystemwithacaciaauriculiformisduring22yearsdrc AT peltierregis evolutionofsoilchemicalpropertiesintherotationalagroforestrysystemwithacaciaauriculiformisduring22yearsdrc AT harmandjeanmichel evolutionofsoilchemicalpropertiesintherotationalagroforestrysystemwithacaciaauriculiformisduring22yearsdrc |
_version_ |
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