Tree-root systems and herbaceous species-characteristics under tree species introduced into grazing lands in subhumid Cameroon
The effect of tree species on the characteristics of the herbaceous stratum, during the first five years of a fallow, was evaluated in the North of Cameroon (average annual temperature 28.2°C, total annual rainfall 1050 mm). Treatments included a natural grazed herbaceous fallow, a natural ungrazed herbaceous fallow and three planted tree fallows (Acacia polyacantha Willd. ssp. campylacantha (Hochst. ex A. Rich.), Senna siamea Lam. and Eucalyptus camaldulensis Dehnh.), which were protected against grazing. Because tree species influenced light interception in different ways, as well as having different root patterns, they had different effects on the herbaceous stratum in terms of species composition and biomass. The grazed herbaceous fallow maintained the greatest species richness. Protection against grazing or the introduction of tree species associated with the absence of grazing induced both a progressive evolution to a particular species composition. The ungrazed herbaceous fallow consisted mainly of Andropogon gayanus Kunth, which provided the greatest biomass (8 t dry matter ha-1 at the end of the fallow period). E. camaldulensis provided little shade and the lowest fine root mass in the top layer allowing the growth of A. gayanus and thus a greater herbaceous biomass (3.5 t DM ha-1) than that found under the other tree species. Under the heavy shade of A. polyacantha, the herbaceous stratum consisted mainly of annual Pennisetum spp. (2.2 t DM ha-1) and showed the greatest N concentration (1.3%), probably due to N2 fixation by the tree species. After the fourth year, despite the relatively open tree canopy, S. siamea, which showed the highest fine root mass, had a strong depressive effect on the herbaceous stratum.
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Subjects: | F62 - Physiologie végétale - Croissance et développement, Andropogon gayanus, Eucalyptus camaldulensis, biodiversité, biomasse, herbage, Acacia, Senna siamea, http://aims.fao.org/aos/agrovoc/c_409, http://aims.fao.org/aos/agrovoc/c_2685, http://aims.fao.org/aos/agrovoc/c_33949, http://aims.fao.org/aos/agrovoc/c_926, http://aims.fao.org/aos/agrovoc/c_3366, http://aims.fao.org/aos/agrovoc/c_32, http://aims.fao.org/aos/agrovoc/c_331153, |
Online Access: | http://agritrop.cirad.fr/516904/ http://agritrop.cirad.fr/516904/1/516904.pdf |
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dig-cirad-fr-5169042024-01-28T11:57:43Z http://agritrop.cirad.fr/516904/ http://agritrop.cirad.fr/516904/ Tree-root systems and herbaceous species-characteristics under tree species introduced into grazing lands in subhumid Cameroon. Harmand Jean-Michel, Donfack Paul, Forkong Njiti Clément. 2003. Agroforestry Systems, 59 (2) : 131-140.https://doi.org/10.1023/A:1026313029783 <https://doi.org/10.1023/A:1026313029783> Tree-root systems and herbaceous species-characteristics under tree species introduced into grazing lands in subhumid Cameroon Harmand, Jean-Michel Donfack, Paul Forkong Njiti, Clément eng 2003 Agroforestry Systems F62 - Physiologie végétale - Croissance et développement Andropogon gayanus Eucalyptus camaldulensis biodiversité biomasse herbage Acacia Senna siamea http://aims.fao.org/aos/agrovoc/c_409 http://aims.fao.org/aos/agrovoc/c_2685 http://aims.fao.org/aos/agrovoc/c_33949 http://aims.fao.org/aos/agrovoc/c_926 http://aims.fao.org/aos/agrovoc/c_3366 http://aims.fao.org/aos/agrovoc/c_32 http://aims.fao.org/aos/agrovoc/c_331153 The effect of tree species on the characteristics of the herbaceous stratum, during the first five years of a fallow, was evaluated in the North of Cameroon (average annual temperature 28.2°C, total annual rainfall 1050 mm). Treatments included a natural grazed herbaceous fallow, a natural ungrazed herbaceous fallow and three planted tree fallows (Acacia polyacantha Willd. ssp. campylacantha (Hochst. ex A. Rich.), Senna siamea Lam. and Eucalyptus camaldulensis Dehnh.), which were protected against grazing. Because tree species influenced light interception in different ways, as well as having different root patterns, they had different effects on the herbaceous stratum in terms of species composition and biomass. The grazed herbaceous fallow maintained the greatest species richness. Protection against grazing or the introduction of tree species associated with the absence of grazing induced both a progressive evolution to a particular species composition. The ungrazed herbaceous fallow consisted mainly of Andropogon gayanus Kunth, which provided the greatest biomass (8 t dry matter ha-1 at the end of the fallow period). E. camaldulensis provided little shade and the lowest fine root mass in the top layer allowing the growth of A. gayanus and thus a greater herbaceous biomass (3.5 t DM ha-1) than that found under the other tree species. Under the heavy shade of A. polyacantha, the herbaceous stratum consisted mainly of annual Pennisetum spp. (2.2 t DM ha-1) and showed the greatest N concentration (1.3%), probably due to N2 fixation by the tree species. After the fourth year, despite the relatively open tree canopy, S. siamea, which showed the highest fine root mass, had a strong depressive effect on the herbaceous stratum. article info:eu-repo/semantics/article Journal Article info:eu-repo/semantics/publishedVersion http://agritrop.cirad.fr/516904/1/516904.pdf text Cirad license info:eu-repo/semantics/restrictedAccess https://agritrop.cirad.fr/mention_legale.html https://doi.org/10.1023/A:1026313029783 10.1023/A:1026313029783 http://catalogue-bibliotheques.cirad.fr/cgi-bin/koha/opac-detail.pl?biblionumber=178927 info:eu-repo/semantics/altIdentifier/doi/10.1023/A:1026313029783 info:eu-repo/semantics/altIdentifier/purl/https://doi.org/10.1023/A:1026313029783 |
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F62 - Physiologie végétale - Croissance et développement Andropogon gayanus Eucalyptus camaldulensis biodiversité biomasse herbage Acacia Senna siamea http://aims.fao.org/aos/agrovoc/c_409 http://aims.fao.org/aos/agrovoc/c_2685 http://aims.fao.org/aos/agrovoc/c_33949 http://aims.fao.org/aos/agrovoc/c_926 http://aims.fao.org/aos/agrovoc/c_3366 http://aims.fao.org/aos/agrovoc/c_32 http://aims.fao.org/aos/agrovoc/c_331153 F62 - Physiologie végétale - Croissance et développement Andropogon gayanus Eucalyptus camaldulensis biodiversité biomasse herbage Acacia Senna siamea http://aims.fao.org/aos/agrovoc/c_409 http://aims.fao.org/aos/agrovoc/c_2685 http://aims.fao.org/aos/agrovoc/c_33949 http://aims.fao.org/aos/agrovoc/c_926 http://aims.fao.org/aos/agrovoc/c_3366 http://aims.fao.org/aos/agrovoc/c_32 http://aims.fao.org/aos/agrovoc/c_331153 |
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F62 - Physiologie végétale - Croissance et développement Andropogon gayanus Eucalyptus camaldulensis biodiversité biomasse herbage Acacia Senna siamea http://aims.fao.org/aos/agrovoc/c_409 http://aims.fao.org/aos/agrovoc/c_2685 http://aims.fao.org/aos/agrovoc/c_33949 http://aims.fao.org/aos/agrovoc/c_926 http://aims.fao.org/aos/agrovoc/c_3366 http://aims.fao.org/aos/agrovoc/c_32 http://aims.fao.org/aos/agrovoc/c_331153 F62 - Physiologie végétale - Croissance et développement Andropogon gayanus Eucalyptus camaldulensis biodiversité biomasse herbage Acacia Senna siamea http://aims.fao.org/aos/agrovoc/c_409 http://aims.fao.org/aos/agrovoc/c_2685 http://aims.fao.org/aos/agrovoc/c_33949 http://aims.fao.org/aos/agrovoc/c_926 http://aims.fao.org/aos/agrovoc/c_3366 http://aims.fao.org/aos/agrovoc/c_32 http://aims.fao.org/aos/agrovoc/c_331153 Harmand, Jean-Michel Donfack, Paul Forkong Njiti, Clément Tree-root systems and herbaceous species-characteristics under tree species introduced into grazing lands in subhumid Cameroon |
description |
The effect of tree species on the characteristics of the herbaceous stratum, during the first five years of a fallow, was evaluated in the North of Cameroon (average annual temperature 28.2°C, total annual rainfall 1050 mm). Treatments included a natural grazed herbaceous fallow, a natural ungrazed herbaceous fallow and three planted tree fallows (Acacia polyacantha Willd. ssp. campylacantha (Hochst. ex A. Rich.), Senna siamea Lam. and Eucalyptus camaldulensis Dehnh.), which were protected against grazing. Because tree species influenced light interception in different ways, as well as having different root patterns, they had different effects on the herbaceous stratum in terms of species composition and biomass. The grazed herbaceous fallow maintained the greatest species richness. Protection against grazing or the introduction of tree species associated with the absence of grazing induced both a progressive evolution to a particular species composition. The ungrazed herbaceous fallow consisted mainly of Andropogon gayanus Kunth, which provided the greatest biomass (8 t dry matter ha-1 at the end of the fallow period). E. camaldulensis provided little shade and the lowest fine root mass in the top layer allowing the growth of A. gayanus and thus a greater herbaceous biomass (3.5 t DM ha-1) than that found under the other tree species. Under the heavy shade of A. polyacantha, the herbaceous stratum consisted mainly of annual Pennisetum spp. (2.2 t DM ha-1) and showed the greatest N concentration (1.3%), probably due to N2 fixation by the tree species. After the fourth year, despite the relatively open tree canopy, S. siamea, which showed the highest fine root mass, had a strong depressive effect on the herbaceous stratum. |
format |
article |
topic_facet |
F62 - Physiologie végétale - Croissance et développement Andropogon gayanus Eucalyptus camaldulensis biodiversité biomasse herbage Acacia Senna siamea http://aims.fao.org/aos/agrovoc/c_409 http://aims.fao.org/aos/agrovoc/c_2685 http://aims.fao.org/aos/agrovoc/c_33949 http://aims.fao.org/aos/agrovoc/c_926 http://aims.fao.org/aos/agrovoc/c_3366 http://aims.fao.org/aos/agrovoc/c_32 http://aims.fao.org/aos/agrovoc/c_331153 |
author |
Harmand, Jean-Michel Donfack, Paul Forkong Njiti, Clément |
author_facet |
Harmand, Jean-Michel Donfack, Paul Forkong Njiti, Clément |
author_sort |
Harmand, Jean-Michel |
title |
Tree-root systems and herbaceous species-characteristics under tree species introduced into grazing lands in subhumid Cameroon |
title_short |
Tree-root systems and herbaceous species-characteristics under tree species introduced into grazing lands in subhumid Cameroon |
title_full |
Tree-root systems and herbaceous species-characteristics under tree species introduced into grazing lands in subhumid Cameroon |
title_fullStr |
Tree-root systems and herbaceous species-characteristics under tree species introduced into grazing lands in subhumid Cameroon |
title_full_unstemmed |
Tree-root systems and herbaceous species-characteristics under tree species introduced into grazing lands in subhumid Cameroon |
title_sort |
tree-root systems and herbaceous species-characteristics under tree species introduced into grazing lands in subhumid cameroon |
url |
http://agritrop.cirad.fr/516904/ http://agritrop.cirad.fr/516904/1/516904.pdf |
work_keys_str_mv |
AT harmandjeanmichel treerootsystemsandherbaceousspeciescharacteristicsundertreespeciesintroducedintograzinglandsinsubhumidcameroon AT donfackpaul treerootsystemsandherbaceousspeciescharacteristicsundertreespeciesintroducedintograzinglandsinsubhumidcameroon AT forkongnjiticlement treerootsystemsandherbaceousspeciescharacteristicsundertreespeciesintroducedintograzinglandsinsubhumidcameroon |
_version_ |
1792495707694825472 |