EFFECTS OF SUBSTRATE ON SEED GERMINATION  AND SEEDLING GROWTH OF Melientha suavis Pierre

Lê Thị Thủy; Nguyễn Thị Tư; Trần Khánh Vân

doi:10.34238/tnu-jst.11794

EFFECTS OF SUBSTRATE ON SEED GERMINATION AND SEEDLING GROWTH OF Melientha suavis Pierre

About this article

Received: 31/12/24 Revised: 27/03/25 Published: 28/03/25

Authors

1. Le Thi Thuy , Hanoi National University of Education
2. Nguyen Thi Tu, Hanoi National University of Education
3. Tran Khanh Van, Hanoi National University of Education

Abstract

Melientha suavis Pierre is an endangered small tree species in Vietnam. Its young leaves and flowers are highly valued for their nutritional and medicinal properties. Primarily found in limestone mountainous regions, this slow-growing species has a low natural regeneration rate. Therefore, propagation techniques for cultivation are crucial for conservation and economic enhancement. This study aimed to evaluate the impact of different growth media on seed germination and seedling development of Melientha suavis Pierre. Results showed that immediate seed sowing after harvest using yellow sand significantly increased root emergence rate (54.5%) and shortened the time to root emergence (21.04 days) compared to seeds stored for one month and sown in black sand. Among the four tested substrates, a mixture of 90% limestone soil and 10% rice husks expedited seedling shoot emergence (44.52 days) and increased shoot emergence rates (90%). In the sapling stage, 100% limestone soil substrate enhanced root length (13.07 cm), plant height (16.46 cm), leaf number per plant (3.54 leaves), and leaf size, while also promoting the earliest new leaf development (11.28 days post-sowing). Conversely, 100% loam soil substrate reduced seed shoot emergence rates and hindered sapling growth. A mixture of 90% loam soil and 10% rice husks yielded more favorable outcomes compared to using pure loam soil as a substrate for M. suavis propagation.

Keywords

Substrate; Seed; Propagation; Melientha suavis Pierre; Germination rate

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DOI: https://doi.org/10.34238/tnu-jst.11794

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