Abstract
SUMMARY Seeds of most Prosopis species exhibit hard seed coat dormancy which must be broken to permit rapid germination. Pretreatments tested for breaking the dormancy of Prosopis juliflora seeds consisted of cutting, abrasion, 30, 60 and 95% sulphuric acid for 2–30 min, boiling water with soaking for up to 5 days, scalding for 2 s to 10 min and passing through a cow. Ninety five percent sulphuric acid for 14 or 30 min, 60% sulphuric acid for 30 min, and manual scarification by cutting or abrasion, all gave germination >94%. Immersion in boiling water followed by 24 h soaking, traditionally used by many field workers, gave only 52% germination. Scalding in actively boiling water for 2 s to 1 min gave similar results (55–74%). Twenty eight percent of seeds passed through a cow germinated compared with 13% of untreated control seeds. Abrasion, 95% sulphuric acid for 14 min and boiling water without soaking also increased germination of seeds of P. articulata, P. caldenia, P. cineraria, P. laevigata and P. t...
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