The studies on optimal seed propagation techniques for Podocarpus Pilgeri Foxw, 1907

Abstract

The study aims to determine the best environmental conditions for propagating Podocarpus pilgeri seeds, including the germination formula, potting mix formula for growing seedlings, and shading formula for the seedlings. The study of the effect of seed treatment methods on germination rates indicated that the most effective seed treatment was soaking in hot water at 50°C for 6 hours, resulting in an average germination rate of 92.38% across replications. For the study on the impact of potting mix composition, the optimal potting mix formula was RB4: 94% topsoil, 5% composted manure, and 1% NPK fertilizer, which yielded an average survival rate of 96.1%. In the study of the impact of shading regimes on seedling growth, the optimal shading formula was CT2, with 75% shading, producing the highest survival rate of 85.71%, with an average root diameter of 3.01 cm and a plant height of 8.46 cm. These findings highlight the crucial role of selecting the appropriate seed treatment, potting mix, and shading conditions in optimizing seedling propagation and growth.