Effects of DTPA, HEDTA, and EDDS on the Growth of Watermelon and Chemical Properties of Plastic Film House Soil

Abstract

A chelating agent helps crops to reuse as nutrients by mobilizing salts from the soil. This study was conducted to evaluate the effects of Diethylenetriamine pentaacetic acid (DTPA), N-(2-hydroxyethyl)-ethylene diaminetriacetic acid (HEDTA), and Ethylene diamine disuccininc acid (EDDS) for improving plant growth and reusing accumulated nutrients in soils of plastic film house. Two experiments were carried out of follows: i) For the incubation test, the availability of nutrients were examined for soils treated with distilled water, 1 mM of DTPA, HEDTA and EDDS solutions. ii) In the pot test, the impacts of watermelon growth response were examined by adding 0.5, 1, and 5 mM of chelating agent to soil. In incubation test, application of chelating agents increased the availability of soil nutrients in the following order : DTPA ≒ HEDTA > EDDS > distilled water. However, biomass of watermelon in pot test, tended to be highest in EDDS 1 mM. The absorption amount of N, P, and K of crop in EDDS 1 mM was similar to that of NPK treatment and K, Ca, Mg, and Fe tended to be high. Soil Electrical conductivity (EC) of 1 mM EDDS showed a 66% decrease compared to no treatment. These results showed that EDDS could be improved the watermelon growth. Further research is needed to evaluate the effects of EDDS for plant growth on field scale.

Effects of Mixed Application of Ethylenediamine-N,N'-disuccinic Acid and Fertilizer on the Growth of Watermelon and Soil Properties of Plastic Film House

“…즉, 수박 식물체가 토양으로부터 가장 많이 소모할 수 있는 영양 성분이 질산태 질소이고, 특히 질산태질소는 전기전도도 수치를 가장 많이 좌우하는 성분이기 때문에 질산태질소와 이와 같은 변화 경향은 EDDS와 비료사용량 수준이 토양 내 이온 성분들의 형태와 미생물 활성을 일부 변화시킬 수 있음을 보여준다. EDDS에 의해 토양 양분 (양이온)의 유효도가 높은 형태로 전환되어 토양 EC와 수용성 함량을 증가 시킬 수 있다(Kim et al, 2022a). 또한, 비료로 투입한 영양분도 수박이 생육하도록 도울 수 있기 때문(Kim et al, 2012)에 킬레이트제와 비료의 적절한 사용이 필요하다고 판단된다.…”