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Water Saving and Drought Resistance Effects of KSAP on SoilWater and Growing of Vegetation

Author: YaoLei
Tutor: JiangFaTang
School: Hubei University of Technology
Course: Of Food Science
Keywords: Konjac Super Absorbent agent Water Soil Available water Bermudagrass
CLC: S482.99
Type: Master's thesis
Year: 2009
Downloads: 34
Quote: 1
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Abstract

The contradiction between supply and demand of water resources in China have become increasingly prominent, through a variety of techniques is imperative to improve water use efficiency, water - saving technology, increasing attention has been paid. Retaining agent in the existing water-saving technologies to the water-based technology is one of the most effective methods of water conservation and drought. Aquasorb strong absorbent resin made of a polymer compound having a high water absorption capacity, such materials contain a large number of strongly hydrophilic groups, and capable of absorbing its own weight hundred times more water can be repeatedly released and absorbed moisture for the soil and plant utilization. Konjac Superabsorber (KSAP) contains a large hydrophilic group such as a hydroxyl group and a carboxyl group so as to have an excellent water retention properties. KSAP as the performance of the new aquasorb and its effect on soil moisture and plant growth were more systematic study made the following conclusions: 1. KGM for material, acrylic water phase system for the monomer by graft copolymerization reaction synthesis of the the konjac super water-absorbing agent (KSAP). FT-IR spectra show that the the KSAP containing a large number of-OH and-COO-hydrophilic group; the SEM photos display the KSAP micro rendered relatively uniform grid physical structure; DSC analysis showed that the acrylic acid (sodium salt) has been grafted onto the konjac polysaccharide, its thermal properties change accordingly; TG analysis showed that the, KSAP ratio of konjac flour starting weightlessness high temperature, better thermal stability. 2 three particle diameter KSAP suction pure water magnification are: 701.4g / g (KSAP ≤ 80 mesh) and 730.8g / g (80 mesh lt; KSAP lt; 20 mesh) and 752.6g / g (20 mesh ≤ KSAP ≤ 10 mesh); brine water absorbency relatively close: 120.3 to 143.0g / g; KSAP in 0.5min within absorbent 153.5g (the KSAP ≤ 80), 78.5 g (80 mesh lt; KSAP lt; 20 mesh), 28.4g (20 mesh ≤ KSAP ≤ 10); the KSAP maintained moisture is not easy in the mechanical condition released from the water retention rate of more than 95% in a centrifugal speed of 5000r/min. 3. KSAP could slow the evaporation of soil moisture, and greatly improve the available soil water. When KSAP amount of 0.30%, particle size 0.80mm Jia Rusha surface spraying, red soil and brown sand available water capacity increase of 32.7%; 18.1% increase in the effective water content of the red soil, brown soil increased water content of 24.3%. 4.KSAP amount of 0.20% and adequate supplies Bermudagrass germination rate of 35%; KSAP under limited water supply conditions, be able to reduce evapotranspiration of Bermuda grass, bermudagrass leaves moisture content and relative water content, improve plant Water condition is conducive to turf grass and drought. Select the appropriate the KSAP dosage and use in practical applications according to soil type and plant species.

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