How to germinate Centrosema pubescens

Centrosema pubescens is a tropical forage legume native to Central and South America. Physical dormancy in seeds requires effective scarification for optimal germination. Seeds have hard seed coat affecting initial germination rates.

Before sowing

Scarification

agua_quente 60% of seeds have hard coat. Immerse in hot water (85°C) for 3-5 minutes, then keep in warm water 12-24 hours. Hot water 2 min = 56.66% germination; 4 min = 48.96% germination with H2SO4

Soak

24 h After hot water scarification, soak in warm water for 12-24 hours before sowing

Mechanical scarification with sandpaper achieves 96% germination. Sulfuric acid scarification (4 min at 10%) achieves ~49% germination. Mechanical methods preferred over acid.

Sowing

Substrate

Sandy loam, moist soil. Sand or river bank sand used in germination tests

Depth

2cm_mais

Temperature

20°C

Moisture

alta

What to expect

Step 1

Pre-treat the seed

Step 2

Sow at 2cm_mais · 20°C

Then

Seedlings emerge (~57%)

Tips

Sow during wet season/before rainfall. Ensure moist soil for 10-14 days after sowing. Avoid low soil temperatures below 15°C. Soak whole seeds, not chipped. 1000 seeds weigh ~25g. Requires Rhizobium inoculation within hours of planting for optimal establishment.

Sources: Wikipedia Centrosema pubescens; PFAF Database; Tropical Forages Database; Keys.lucidcentral; Academia.edu Nigeria germination study; Feedipedia

Fresh seeds to sow

Centrosema pubescens

Before sowing

Sowing

What to expect

Tips

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