Effect of Silkworm Waste Bio-extract on Growth and Yield in Vietnamese Coriander (Polygonum odoratum Lour.)

Abstract

Vietnamese coriander (Polygonum odoratum Lour.) is a herbaceous plant that
is popular to grow as backyard vegetable and local Thai herb. Since the silkworm rearing
process had a lot of silkworm excrement as its waste, this experiment was interested in
studying the effect of silkworm waste bio-extract at different concentrations on growth
in vietnamese coriander. The experiment was designed by completely randomized
design (CRD) for 5 treatments in different silkworm waste bio-extract concentrations which
are no applying waste bio-extract (SWB0), diluted waste bio-extract to 10, 20, 30 and 40
times (SWB10, SWB20, SWB30 and SWB40). There were 10 replications and 1 plant in
each. The result showed that SWB20 and SWB30 had the highest growth after planting
for 6 weeks. The plant height of 28.30 and 27.04 cm, plant width of 38.38 and 35.88 cm,
leaf length of 6.12 and 5.96 cm, leaf width of 2.24 and 2.2 cm, SPAD value of 51.38 and
47.46, shoot and root fresh weight of 36.80 and 30.92 grams, shoot fresh weight of 29.62
and 24.46 gram, and root fresh weight of 7.18 and 6.47 gram were obtained from SWB20
and SWB30, respectively. Therefore, this is possible to use the silkworm waste bio-extract
to produce organic vietnamese coriander.