The influence of environmental factors on the growth, development and tuber formation of Eleocharis ochrostachys under natural conditions in Tram Chim National Park, Tam Nong district, Dong Thap province

Abstract

Environmental factors play a crucial role in the growth, development and tuber formation of Eleocharis ochrostachys. The study aimed to assess the impact of environmental factors on the growth, development and tuber formation of Eleocharis ochrostachys. The results showed that Eleocharis ochrostachys grows, develops and forms tubers well in soil conditions with very low pH, around 3.26 - 3.74, soil moisture of 70 - 100% and soil EC values between 2.18 - 3.96 mS/cm. It grows well in soil with low bio-available nitrogen content (about 0.020 - 0.032 mg/100 g soil), low bio-available phosphorus content (around 3.84 - 4.31 mg/100 g soil) and high organic carbon content (13.0 - 15.0%OM). Eleocharis ochrostachys exhibits poor growth and does not form tubers in low soil moisture conditions, around 30 - 40%. Furthermore, when water levels in the field are high, causing Eleocharis ochrostachys to be submerged in water continuously for extended periods, Eleocharis ochrostachys does not form tubers.