English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Acacia mangium Willd est une espece a croissance rapide, fixatrice d’azote, capable de restituer au sol des elements mineraux par chute de litiere. Elle est actuellement tres utilisee dans les programmes de reboisement. L’effet substrat sur la biomasse des plants, a l’âge de plantation, a ete estime dans le but d’optimiser les conditions de production des plants. Un dispositif en blocs complets randomises comprenant six types de substrats a base de terre noire, charbon et sciure de bois, a ete mis en place. Des jeunes plants âges de trois semaines ont ete transplantes dans des plaques alveolees comprenant differents substrats puis eleves jusqu’a l’âge de plantation. Une dose de 30 g d’engrais NPK dilues dans 10 l d’eau a ete apportee quotidiennement aux plants. Les resultats obtenus montrent un effet substrat sur la biomasse et la croissance. Les plants issus des substrats 6 (75% terre+25% charbon) et 4 (50% terre+50% charbon) presentent les meilleures performances de croissance. L’Activite Reductrice d’Acetylene (ARA) realisee a ete influencee par le substrat. La dose de fertilisation apportee n’a pas engendre l’avortement des nodules. Le substrat 5 (50% de terre noire, 25% de charbon et 25% de sciure de bois) offre les conditions optimales de developpement des nodules.Mots cles : Substrat, Acacia mangium, biomasse, ARA.   English Title: Effect of substrate on the biomass and the symbiotic fixing of nitrogen by Acacia mangium willd. (Fabaceae) seedlings in the nurseryAcacia mangium Willd is a rapid growth species, fixing of nitrogen and able to restore on the ground biogenic salts through the fall of litter. It’s currently very used in the afforestation programs. The effect of substrate on the seedlings biomass at the plantation age was estimated with the aim of optimizing the seedlings production conditions. A randomized complete blocks of six types of substrate containing black soil, charcoal and sawdust, was set up. Seedlings of three weeks old were transplanted in the alveolate plates with various substrates during the education phase until the age of plantation. 30 g of a mineral fertilizer NPK (20-20-20) diluted in 10 l of water was brought daily to the seedlings. The results showed a substrate effect on the biomass and the plants growth. Seeedlings which growed on the substrate 6 (75% black soil + 25% charcoal) and 4 (50% black soil + 50% charcoal) present the best growth performances. The Acetylene Reduction Assay (ARA) realized was significantly influenced by the types of substrate. Mineral fertilizer brought does not generate the abortion of the nodules. The substrate 5 (black soil 50%, charcoal 25% and sawdust 25%) offered the optimum conditions of nodules development.Keywords: Substrate, Acacia mangium, biomass, ARA.

international journal of biological and chemical sciences

Effet du substrat sur la biomasse et la fixation symbiotique de l’azote par les plants de &lt;i&gt;Acacia mangium&lt;/i&gt; willd. (Fabaceae) en pépinière