Effects of Different Macromolecule Absorbent Resins on the Moisture Characteristics of Major Soil Type on Loess Plateau

Abstract

Macromolecule absorbent resins have an incredibly strong water absorbing capacity and can absorb moisture content several hundred or even thousand times higher than that of its own. More than 85 % of the absorbed moisture may be used by crops. Due to the cross linkage of molecular structure, the moisture absorbed by the molecular network cannot be extracted using general physical methods, thus contributing to the strength of the water retentivity. Due to its unique structure and excellent performance, PAM (polyacrylamide) has been gradually applied in the restoration and improvement of the ecological environment 1,2. With its strong water absorption and water retention abilities, PAM can significantly improve the water retention ability and moisture of soil and improve the utilization efficiency of water resources after application in soil as a non-toxic and non-polluting material 3. As shown by a large number of studies, the application of PAM as the conditioner or stabilizer of soil structure may increase the cohesive affinity of grains on the upper soil layer, maintain a good soil structure, avoid soil crust and increase the infiltration rate of soil 4 and reduce surface runoff and avoid

Water-Retaining Agent as a Sustainable Agricultural Technique to Enhance Mango (Mangifera indica L.) Productivity in Tropical Soils

“…WRAs are soil amendments that can promote plant growth by improving soil structure, aggregation, and water availability [27][28][29]. The incorporating of WRAs into the soil can enhance its permeability, porosity, and water-retention capacity, hence improving soil conditions that facilitate plant growth [13,29]. The results of the principal component analysis revealed that most of fruit quality indexes were associated with the addition of WRAs.…”

“…Water-retaining agents (WRAs) are high-molecular cross-linked polymers that can improve the water-holding capacity of the soil [11,12]. When mixed with soil, WRAs can improve its physical properties by reducing soil bulk density and increasing soil aggregation, permeability, porosity, and water-retention capacity [11,13]. WRAs are soil improvers that can decrease soil strength and aggregate stability, which can enhance soil and water conservation and encourage plant development [11][12][13].…”

“…When mixed with soil, WRAs can improve its physical properties by reducing soil bulk density and increasing soil aggregation, permeability, porosity, and water-retention capacity [11,13]. WRAs are soil improvers that can decrease soil strength and aggregate stability, which can enhance soil and water conservation and encourage plant development [11][12][13]. Water-retaining compounds are currently used by many crop growers, and the outcomes are favorable [11,12].…”

Model Test Study on the Enhancement of Ecological Self-Repairing Ability of Surface Slope Soil by New Polymer Composites

“…In order to improve the water supply capacity of soils, superabsorbent resins have been introduced [ 16 ]. Its special three-dimensional-like molecular chain structure allows it to absorb and conserve large amounts of water in a short time [ 17 ].…”

“…Its special three-dimensional-like molecular chain structure allows it to absorb and conserve large amounts of water in a short time [ 17 ]. Once the water content of the soil is low, the water stored in the resin is gradually released by the suction of the substrate and supplied to the plant growth, thus alleviating the drought stress [ 16 ]. Studies have shown that, on the one hand, the resin improves soil fertility by increasing the ability to retain water and hold nutrients [ 18 ].…”