Effect of Pre-treatments and Sowing Depths on Germination and Early Growth of Leucaena leucocephala seeds.

  • Sherzad Omar Hamad Department of Forestry, College of Agricultural Engineering Sciences, Salahaddin University-Erbil, Kurdistan Region, Iraq.
  • Laween Salar Anwer Department of Forestry, College of Agricultural Engineering Sciences, Salahaddin University-Erbil, Kurdistan Region, Iraq.
Keywords: Germination,Growth,Seed treatment,Sowing depth


Leucaena leucocephala (Lam) de wit is an evergreen shrub or tree with a fairly open, rounded crown; it can grow from 5 - 20 meters tall. The tree species used for several agricultural purposes in the Mediterranean region. The seeds of this species exhibit dormancy due to presence hard seed coat, causing delayed germination.  The aim of this study was to investigate the effect of seed pre-treatments, seeding depths and their interaction on the germination, growth and biomass parameters of L. leucocephala. This study was conducted in the glass-house. The seeds were exposed to three pre- treatments: control (T1), scarification (T2), and soaking in hot water for 12 hours (T3), then the seeds were sown in 1cm and 2cm deep. Germination percentage (%) and growth performance were measured. The results showed that soaking in hot water and sowing in 1 cm deep had a great effect on the germination and early growth of L. leucocephala. Thus, for maximum germination and initial vigorous seedlings growth of L. leucocephala, the present study suggests that the seeds should be immersed in hot water and left for 12 hours and then planted in 1 cm deep.


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Adelani, D. O. 2015. Effects of pre-germination treatments and sowing depths on early growth of sesban (Sesbania sesban). Applied Tropical Agriculture, 20(1), 31-36.
Aganga, A.A. and Tshwenyane, S.O., 2003. Lucerne, Lablab and Leucaena leucocephala forages: production and utilization for livestock production. Pakistan Journal of Nutrition, 2(2), pp.46-53.
Amaral, F.H., Nóbrega, J.C., Nóbrega, R.S. and Amorim, S.P.D.N., 2016. Growth of Leucaena leucocephala (Lam.) de Wit favored by organic waste in the Brazilian semiarid region. Revista Brasileira de Engenharia Agrícola e Ambiental, 20(7), pp.612-617.
Arowolo, A. D. 2007. Alley farming and sustainable Agriculture. In Proceedings of annual conference of IRDI research and development network, 2(4), 27-28.
Azad, S., Manik, M. R., Hasan, S., & Matin, A. 2011. Effect of different pre-sowing treatments on seed germination percentage and growth performance of Acacia auriculiformis. Journal of Forestry Research, 22(2), 183-188.
Chima, U.D., Etuk, E.C. & Fredrick, C., 2017. Effects of sowing depths on the germination and early seedling growth of different seed sizes of Annona muricata L. African Journal of Agriculture, Technology and Environment, 6(2), 134-144.
Chotchutima, S., Tudsri, S., Kangvansaichol, K. and Sripichitt, P., 2016. Effects of sulfur and phosphorus application on the growth, biomass yield and fuel properties of leucaena (Leucaena leucocephala (Lam.) de Wit.) as bioenergy crop on sandy infertile soil. Agriculture and Natural Resources, 50(1), 54-59.
Gholami, S., Hosseini, S. M., & Sayad, E. 2007. Effect of soil, sowing depth and sowing date on growth and survival of Pistacia atlantica seedlings. Pak. J. Biol. Sci, 10(2), 245-249.
Graham, P. H. & Vance, C.P. 2003. Legumes: importance and constraints to greater use. Plant Physiol 131:872–877

Hamad, S. O. & Ali, O. O. 2011. Effect of some pretreatments and sowing periods on seed germination percentage of Acacia farnesiana, Gleditsia triacanthos and Robinia pseudoacacia in the plastic house. Zanco Journal of Pure and Applied Science, 23(4), 44-50.
Hwang, C.Y., Hsu, L.M., Liou, Y.J. and Wang, C.Y., 2010. Distribution, Growth, and Seed Germination Ability of Lead Tree (Leucaena leucocephala) Plants in Penghu Islands, Taiwan. Weed Technology, 24(4), 574-582
Islam, M. T., Wadud, M. A., Mondol, M. A., & Rahman, G. M. M. 2010. Effect of sowing depth on germination of important multipurpose trees. J. Agroforest. Environment, 4(2), 1-5.
Kibru, T., Zewdie, S., Gure, A., & Gebre, T. 2015. Effect of growing media, sowing depth, and hot water treatment on seed germination and seedling biomass of Acacia senegal (L) wild. Science, Technology and Arts Research Journal, 4(3), 47-57.
Lal, P. 2003. Seed sowing techniques in nursery. In forest tree seeds and nursery management (Virendra, S. & S. K. Lavania), Bishen Singh Mahendra Pal Singh, Dehra Dun, pp 165-174.
Longer, D.E. & Degago, Y. 1996. Field weathering potential of normal and hardseeded soybean genotypes. Seed Science and Technology, 24(2), 273-280.

Missanjo, E., Chioza, A., & Kulapani, C. 2014. Effects of different pretreatments to the seed on seedling emergence and growth of Acacia polyacantha. International Journal of Forestry Research, 2014, 1-6.
Mohamed-Yaseen, Y., Barringer, S.A., Splittstoesser, W.E. & Costanza, S. 1994. The role of seed coats in seed viability. The Botanical Review, 60: 426-439.
Orwa, C., Mutua, A., Kindt, R., Jamnadass, R. & Simons, A. 2009. Agroforestry Database: a tree reference and selection guide version 4.0 http://apps.worldagroforestry.org/treedb2/speciesprofile.php?Spid=1069
Pachas, A.N.A., Shelton, H.M., Lambrides, C.J., Dalzell, S.A. and Murtagh, G.J., 2018. Effect of tree density on competition between Leucaena leucocephala and Chloris gayana using a Nelder Wheel trial. I. Aboveground interactions. Crop and Pasture Science, 69(4), 419-429.
Parrotta JA. 1992. Leucaena leucocephala (Lam.) de Wit: leucaena, tantan. Res. Note SO-ITFSM-52. New Orleans: USDA Forest Service, Southern Forest Experiment Station. 8 p.
Pramod, S., Patel, K. and Rao, K., 2013. Effect of exogenous growth regulators on pattern of xylogenesis in young shoots of Leucaena leucocephala. Acta Botanica Hungarica, 55(1-2), 81-97.
Salem, A.Z.M., Olivares, M., Lopez, S., Gonzalez-Ronquillo, M., Rojo, R., Camacho, L.M., Cerrillo, S.M.A. and Mejia, H.P., 2011. Effect of natural extracts of Salix babylonica and Leucaena leucocephala on nutrient digestibility and growth performance of lambs. Animal Feed Science and Technology, 170(1-2), pp.27-34.
Shafiq, M., Iqbal, M.Z. and Mohammad, A., 2008. Effect of lead and cadmium on germination and seedling growth of Leucaena leucocephala. Journal of Applied Sciences and Environmental Management, 12(2), 61-66.
Sharma, S., Naithani, R., Varghese, B., Naithani, S. C., & Keshavkant, S. 2008. Effect of hot-water treatment on seed germination of some fast growing tropical tree species. Journal of Tropical Forestry, 24(3), 49-53.
Silvertown, J. 1999. Seed ecology, dormancy, and germination: a modern synthesis. American Journal of Botany, 86(6), 903–905.
Singh, A., 2012. Effect of spatial distribution on the growth performance of Leucaena leucocephala planted on coal mine spoil. Bulletin of Environment, Pharmacology and Life Sciences, 1(3), 55-57.
Tadros, M. J., Samarah, N. H., & Alqudah, A. M. 2011. Effect of different pre-sowing seed treatments on the germination of Leucaena leucocephala (Lam.) and Acacia farnesiana (L.). New forests, 42(3), 397-407.
Whitesell, C.D. and Parrotta, J.A., 2008. Leucaena leucocephala (Lam.) de Wit. 658-660. In Bonner, F.T. and Karrfalt, R.P.(Eds.) The Woody Plant Seed Manual. Agric. Handbook No. 727. Washington, DC. US Department of Agriculture, Forest Service. 1223 p.,
How to Cite
Omar Hamad, S. and Salar Anwer, L. (2021) “Effect of Pre-treatments and Sowing Depths on Germination and Early Growth of Leucaena leucocephala seeds.”, Zanco Journal of Pure and Applied Sciences, 33(s1), pp. 53-61. doi: 10.21271/ZJPAS.33.s1.5.