Effectiveness of planting intervals on the growth, above-ground biomass and some wood properties of two Sesbania Species

Sesbania grandiflora and S. sesban at three growing spaces (1 X 0.5, 1 X 1 and 1 X 1.5 m) were conducted in a loamy sandy soil of Kom-Ombo Tropical Farm, Aswan Botanical Garden during 2013/2014 and 2014/2015 seasons. Generally, plant height, root length, stem diameter, fresh weight of plant and root as well as dry weight of plant and root significantly increased due to using 1 X 1.5 m plant spacing compared to other treatments, whatever time elapsed or species tested .Concerning, 1 X 1 m space the stem length for the two species in the mean of seasons were recorded. Also, the highest value of plant height at 90 days from planting was due to 1 X 0.5 m space in the two seasons. However, S grandiflora recorded significantly higher for growth and above ground biomass characters when compared to S. sesban in the two seasons. On the contrary, the effect of plant spacing on the moisture content and specific gravity were not significant. Meanwhile, the 1 X 0.5 m space with S. grandiflora gave the highest value of specific gravity while, the same space with S. sesban recorded the more moisture content compared to the other combinations.