Effect of some farming factors on growth and yield of in vitro centella (Centella asiatica (L.) Urban) in Quang Tho commune, Thua Thien Hue province

Abstract

Quang Tho commune is the locality with the largest area of Centella growing in Thua Thien Hue province, with about 70 hectares, of which 52 hectares are produced according to the Vietgap standard. This study investigated the morphological, growth, and yield characteristics of in vitro Centella in Quang Tho commune. The results showed that the growth ability of in vitro origin seedlings was not significantly different from that of natural cuttings or seeds; they had smaller and higher uniform leaves. The in vitro centella shows the best results of leaf morphology, growth, leaf spot disease reduction, and yield when planted in the spring (from 10 to 20/2) with an average planting density (25 plants/m²). The yield reached 6.13 tons/ha with a low disease rate (12.01% after 14 days). Based on the total yield, the suitable duration to harvest is 25-28 days/time (total yield reaches 2.10 kg/m²). Developing a process for growing in vitro centella culture helps provide: Uniform, Disease-free seedlings for planting and helping increase Centella's economic value.