Effects of Growth Media on Germination and Early Seedling Development of Dioscoreophyllum cumminsii

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Tolulope Olaseeni Bamigboye Joshua Kayode Modupe Janet Ayeni

Abstract

Background and Objective: Growth medium has been considered to be the most critical factor determining seedling quality in the nursery as it act as a reservoir for nutrients and moisture. The objective of this study therefore was to determine the effect of different growth media on the emergence and early growth of D. cumminsii seedlings.
Methods: 180 freshly collected seeds were selected and divided into six groups of 30 seeds each. They were sown in black polythene pots separately filled with six media, viz: T1= top soil and sawdust (1:1); T2= river sand and top soil (1:1); T3= river sand and sawdust (1:1); T4= sawdust only; T5= river sand only and T6= top soil only (control). Germination initiation was observed for two months after the first and total emergence were counted and recorded. Assessment of growth parameters commenced four weeks after epicotyls emerged and was done monthly for three months. The parameters assessed were seedling heights, leaf production, stem girth and leaf area.
Results: The results obtained revealed that T3 has the highest mean germination (60%) while T5 had the least (15%). T4 recorded the best performance with mean height growth and mean leaf production (12.23cm and 11.67) respectively, the least was recorded in T2 (9.87cm and 7.67 respectively). Also, T4 has the highest stem girth while both T3 and T5 recorded the least mean stem girth. The highest mean leaf area was recorded in T6 (25.47cm2) while T1 had the least (13.19cm2).
Conclusion: The study revealed that the growth of D. cumminsii seedlings depend significantly on the type of medium on which it was raised and the use of soil amendments. The species also does better when growth media are used singly than combined.

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