Rooting of Three Ornamental Plants in Eight Propagation Substrates

摘要

Parboiled rice hulls (PBH) and coconut coir (CC) are being evaluated as potentially new substrates for the propagation industry. Peat moss (PM) and perlite (PER) have been used in many propagation studies showing suitable rooting characteristics for woody ornamentals. The objective of this study was to evaluate the effect of PBH, CC, PM and PER substrates used individually or in combination (1:1, v/v) on the rooting of semihardwood cuttings from three woody ornamentals. Results indicated that in general substrate pH decreased during the rooting period. Based on rooting percentages and number of roots per cutting, PM continues to be a good rooting substrate; PM:PER, and CC:PER also appear to be good rooting substrates. Parboiled rice hulls (PBH) appear to be a suitable rooting substrate when combined with peat moss.