Presentation on theme: "Early Growth of Ramon (Brosimum alicastrum Sw.) and Relationships Between Seed Weight and Seedling Size Anibal Niembro Instituto de Ecologia, A.C. Xalapa,"— Presentation transcript:
Early Growth of Ramon (Brosimum alicastrum Sw.) and Relationships Between Seed Weight and Seedling Size Anibal Niembro Instituto de Ecologia, A.C. Xalapa, Veracruz, Mexico. C.P f
Materials and Methods Collection of bulk sample 200 randomly chosen seeds Seeds were weighed and planted
Materials and Methods Growth was measured by monitoring: Emergence rate Seedling height Main root length Stem diameter Number of leaves Stem and leaf fresh and dry weight Root fresh and dry weight Sturdiness quotient Shoot/root ratio
Materials and Methods Descriptive statistics: Mean, standard deviation, standard error, 90% CI, minimum and maximum values, and the range of coefficient of variability. Correlation analysis Relationship between seed weight and other variables.
Results & Discussion – Seed Weight and Emergence 184 seeds germinated Seed weight ranged from 0.65 – 6.02 g Emergence began 12 days after sowing and continued for 27 days; average time to germination: 17.8 days
Results & Discussion: Seedling Growth and Development
Results & Discussion: Correlation Analysis Heavier seeds did tend to germinate faster (P<0.01) Earlier germination = head start = large differences in seedling size and weight.
Results & Discussion: Correlation Analysis
Summary This experiment found that fresh seed size did effect emergence rate and the growth of B. alicastrum seedlings. Selection and planting of medium to medium large seeds is recommended for nursery production.