Effects of inorganic fertilizers on biological nitrogen fixation and seedling growth of some agroforestry trees in Bangladesh

Abstract

The effects of different inorganic fertilizers (Urea and Triple Super Phosphate (TSP)) on seedling growth and nodulation capabilities of four agroforestry tree species (Albizia chinensis, A. saman, Acacia nilotica and Sesbania sesban) were compared. The nodulation of these seedlings were treated with different fertilizer treatments (at the rate of urea 40 kg hm -2 , urea 80 kg hm -2 , TSP 40 kg hm -2 , TSP 80 kg hm -2 , (urea+TSP) 40 kg hm -2-and (urea+TSP) 80 kg hm -2 ) after one month of seed germination. The results revealed that the seedling growth was enhanced significantly with moderate fertilizer treatment. In some cases, the higher levels of fertilizers reduced the seedling growth. The study also revealed that the nodulation in nodule number and size was significantly inhibited by the application of N fertilizer (Urea), while it was increased significantly with the application of P fertilizer (TSP). This study improved our understanding and provided insights that would be useful to the farmers in their efforts to amend the soil with inorganic fertilizers in order to enhance plant growth and biological nitrogen fixation.

Fatty acid profile of Albizia lebbeck and Albizia saman seed oils: Presence of coronaric acid

“…Albizia lebbeck is a fast‐growing deciduous tree occurring naturally in tropical Asia and Africa as well as parts of Australia (Queensland) and islands in the Indian and Pacific Oceans and is nitrogen‐fixing . Another common species, A. saman (often referred to as Samanea saman , especially in less recent literature) occurs in tropical regions of Central and South America and is also nitrogen‐fixing . Albizia saman is also known by other names including raintree, due to its folding of leaves during rainfall, and monkeypod.…”

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

“…Aussi, nos résultats ont montré que le substrat de type 3 qui a présenté la Biomasse Totale la plus faible ainsi que les plus faibles valeurs des paramètres de croissance à trois mois, a par contre enregistré la plus importante activité de réduction d'acétylène. En considérant que l'apport de l'azote booste la croissance des plants (Schulz and Glaser, 2012), nos résultats sont conformes à ceux trouvés par Uddin et al (2008), qui soutiennent que le nombre et la taille des nodules peuvent être considérablement contraints par l'utilisation d'engrais azotée, bien que la dose apportée en soit le déterminant (N'dri Kouassi et al, 2019). Aussi la pauvreté en azote (Voisin et al, 2010) ou en phosphore (Qiao et al, 2007 ;Chen et al, 2011 ;Qin et al, 2012) d'un milieu de croissance stimule chez les légumineuses la nodulation (Qiao et al, 2007, Voisin et al, 2010, bien que les travaux de Razzaque et al (2016) aient prouvé le contraire.…”

Influence of Mineral Fertilization on the Capacity of Nodulation of Three Species of Legumes (Groundnut, Cowpea and Soybean)

“…Indeed, according to Uddin and al. [9], the number and size of nodules are greatly reduced in the presence of nitrogen in the soil. This decrease in the number of nodules for nitrogen fertilization may be due to the fact that the increase in the number of legume nodules is a function of the lack of nitrogen in the soil.…”