Application of salt-isolation materials to a coastal region: effects on soil water and salt movement and photosynthetic characteristics ofRobinia pseudoacacia

Abstract

Soil salinization is a major obstacle to the optimal utilization of land resources. Salt鄄affected soils are widely distributed throughout the world. The present extent of salt鄄affected soils substantially restricts plant growth in these areas. It has been demonstrated that leaching with water, chemical amendment, surface mulching with straw and phytoremediation are the most often used approaches to ameliorate saline soils. Engineering measures are also an effective solution to control salt movement in the saline soil. Establishing salt鄄isolation interlayers beneath the surface of saline soil is one of the most widely used engineering measures. Even though there are many studies dealing with salt鄄isolation interlayers establishment, very little is known about their effects on saline soil. Here, we used three salt鄄isolation materials to restrict the water and http: / / www.ecologica.cn salt movements in saline soil: zeolite, ceramsite and river sand. The aim of this study was to assess the effects of salt鄄 isolation interlayers application on soil water and salt movements in saline soil and on the photosynthetic characteristics of Robinia pseudoacacia in the coastal regions of Tianjin city. We also anticipate that the outcome of the study could form part of the basis for selection of salt鄄isolation materials in improving coastal saline soil with consideration of their costs. The

Research Progress on Improvement of Saline Alkali Soil

“…The net photosynthetic rate, transpiration rate, stomatal conductance and water use efficiency of leaves are significantly increased, and the growth of tree height and ground diameter are significantly increased. The effect is better than ceramsite and river sand [16]. Using slag as the interlayer (particle size of 2 ~ 25 mm, 20 cm thickness at the bottom of the tree hole) can reduce the soil conductivity and promote the photosynthesis of Fraxinus chinensis.…”

Photosynthetic nitrogen utilization of Robinia pseudoacacia, an invasive species, grown in contrasting light conditions: A leaf scale approach

“…Robinia pseudoacacia L. ( R. psudoacacia ) has been planted at sites where soil conditions are infertile as it has a symbiotic relationship with N ‐fixing bacteria (Choi et al, 2017; Du et al, 2019; Moshki & Lamersdorf, 2011; Muranaka et al, 2005; Röhm & Werner, 1991; Zeng et al, 2021; Zhang et al, 2018). It is a typical alien species (Nicolescu et al, 2020; Wang et al, 2015; Yin et al, 2014) and its control is enforced by the Japanese law (Enforcement Status of Invasive Alien Species Act) that was introduced in 2004. This species threatens biological diversity as it can rapidly expand its distribution with its unique germination traits (Karaki et al, 2012; Pedrol et al, 2018; Watanabe et al, 2014) and extremely high growth rate from sprout (Kitaoka et al, 2022).…”

Effects of Water and Salt Movement On Photosynthetic Production Characteristics and Yield Formation of Cotton On Coastal Saline Land

“…Numerous researchers have conducted in-depth studies on factors of spatial distribution of soil salinity in coastal saline land, effects of saline land amelioration actions on soil physiochemical properties, and mechanism of action of plant photosynthetic production (Fall 2017; Shan et al 2011;Zhang et al 2012; Wang et al 2015; Wang et al 2017), revealing a phenomenon during production practice that amelioration performance varied much after the same amelioration action was taken in the same area with the same groundwater salinity. In previous studies, variations in spatial distribution of soil water and salt in coastal saline land are mostly used to evaluate amelioration action performance, and more studies on soil water and salt movement focus on one period or part of the soil layer, resulting in discrepancy between soil amelioration performance evaluated based on the data during one period and crop production.…”