Germination and Growth of Faidherbia albida (Del.) A. Chev. under Different Proportions of Potting Soil and Different Water Regimes

Abstract

Faidherbia albida is an economically important forest tree species mostly used in agroforestry systems. The species is heavily threatened with livestock feed, and studies about its regeneration are scares. The aim of this study is to contribute to the knowledge of the species F. albida production techniques, specifically by investigating the best pre-treatments for lifting the dormancy of seeds and the best suited substrate and water regime to the growth and development of seedlings. An experimental study as regards germination of seeds in the laboratory, and assessment of growth parameters through irrigation regime and type of substrate in nursery was carried out. A split-plot experimental design was used for seed germination rates i.e. five pre-treatments (98% acid, 75%, 50%, 10% and H2O) with four repetitions each. Afterwards, the 98% and 75% acid concentrations were used for the remaining study. A randomized complete block design with three blocks and nine plots was established in a nursery to assess the growth variables. The highest germination rates were noted with sulfuric acid doses of 98% and 75% with respective rates of 100% and 43.75%. Significant differences in growth parameters were observed among treatments, and the treatment that consisted of 100% potting soil and watering once every two days showed the best growth for all assessed growth parameters (height, number of leaves and number of spines) except for root length. This study supports that suitable pre-treatment is needed to lift seeds dormancy in F. albida, as well as suitable substrate and water regime are required for seedlings growth and development.