Effects of water levels and soil nutrients on the growth of Iris laevigata seedlings

Abstract

Iris laevigata is geographically restricted and legally protected in Korea. In this study, a mesocosm study was conducted to examine the effects of environmental conditions such as water levels and soil nutrient conditions on the growth and survival of I. laevigata seedlings. Complete submergence lowered the total number of leaves, biomass, and survival rates. A rise in soil nutrients increased overall seedling growth and increased tiller numbers via the promotion of asexual reproduction. Also, we found that the lowest measured values of seedlings are associated with the most stressful condition due to the interaction of low soil nutrients and high water levels. I. laevigata seedlings, however, are distributed in low-nutrient habitats such as floating mat, even though they do not grow well under these conditions. This study suggests that I. laevigata does not prefer low-nutrient condition but choose another benefit such as low competition. Also, the water level must be lower than the seedling height for effective growth and management of I. laevigata.

Cultivation and Propagation of Iris laevigata Fisch., an Endangered Ethno-medicinal Plant of Imphal Valley Manipur, India

“…Lacoul and Freedman (2006) supported this view and opined that "rapid seedling growth is required to quickly escape the stressful environment of submergence and low nutrient seedlings". Lee et al (2018) reported the effect of water levels and soil nutrients on the growth of endangered Iris laevigata seedlings in Korea. A rise in soil nutrients increased overall seedling growth and increased tiller numbers via the promotion of asexual reproduction.…”

“…during annual Cheiraoba festival in April is being cultivated in private nurseries in view of the huge public demand (Sobhapati, 2017). Lee et al (2018) reported the effect of water levels and soil nutrients on the growth of endangered I. laevigata seedlings in Korea. The study was conducted to examine the effects of environmental conditions such as water levels and soil nutrient conditions on the growth and survival of I. laevigata seedlings.…”

Vegetation and water characteristics of floating mat in a coastal lagoon as the habitat for endangered plant species

“…In addition, it seemed likely that the distribution of companion species was also subjected to the difference in water level. Polygonum thunbergii, C. heterolepis, and the endangered species as shallow-water species were mainly found under the canopy of P. australis (Kim et al 2013;Lee et al 2018), whereas the greater part of S. fluviatilis as a deep-water species was observed in company with Z. latifolia on the floating mat (Yuan et al 2007).…”

“…The fact that endangered species were found in the floating mat may not mean that the floating mat has provided optimal environments for those species. Rather, it might indicate that the floating mat has offered relatively better environments for those weak competitors when compared with the growth in the wetlands on the land because of decreased competitive pressure as a result of the oligotrophic condition of the floating mat (Shin et al 2015;Lee et al 2018). In addition to the oligotrophic condition, continuously maintained water level on the floating mat regardless of varying water level in the lagoon could also be a favorable environment for endangered species to germinate, grow, and establish stably (Cherry and Gough 2006;Shin et al 2015).…”

Changes in Growth Parameters, C:N:P Stoichiometry and Non-Structural Carbohydrate Contents of Zanthoxylum armatum Seedling in Response to Five Soil Types

“…Soil is the basic substrate for plant growth and development, and its physicochemical properties are important external influencing factors for plant growth and development [1,2]. Different types of soil represent different physical and chemical characteristics due to differences in their formation processes, nutritional conditions, etc., which will lead to differences in water absorption efficiency, nutrient absorption, and transportation efficiency during plant growth and development [3,4].…”