PASP 5 g.Finally,in the view of drought resistance,the correlation between transpiration price and leaf water potential of therapy ⑤ and ⑨ confirmed the very best formulation was therapy ⑨.Applying the know-how of the SAP compound and exogenous substance in the forest cultivation is of nice significance to afforestation in arid areas. The tremendous-absorbent compound polymer was synthesized by aqueous answer polymerization utilizing acrylic acid and acrylamide as raw material. Without the protection of nitrogen fuel,with the materials of potato starch,acrylic acid and acrylamide,ammonium persulfate as initiator with glycerol as crosslinking agent,salt-resisting tremendous absorbent polymers was ready by aqueous solution polymerization technique,and synthesis craft of potato starch salt-resisting super absorbent polymer was optimized. Objective: To prepare Graft Copolymerizing Starch and Acrylic Acid Super Absorbent Polymer (SAP) initiated by Oxidative-Reductive initiator "in one pet".Mtehod: the Polymeric reaction is in a aqueous solution. Researching the reaction mechanism additional in agriculture, including their salt resistance, lowing their value, rising the degradability, getting ready purposeful SAP is perhaps the principle research field of ASAP in the future. The results showed that the optimum reaction conditions are as follows:the mass ratio of acrylic acid to acrylamide 5:1,reaction temperature 70 ℃,the neutralization diploma of acrylic acid 70%,the quantity of initiating agent 0.1%,the amount of crosslinker 0.01%. Under such circumstances,absorption price of tremendous-absorbent polymer for pure water and salt water was as much as 2 653.Zero g/g and 137.2 g/g respectively,which showed the polymer had good water retentivity.

Super absorbent resin ready from modification of pure polymers as a sort of functional materials has developed quickly lately.The unique chemical structure makes natural polymers can absorb water lots of even 1000's of occasions of their own weight.Natural polymers also can absorb some kinds of salt solutions in relatively large amount.The introduction of natural polymer into molecular construction made the obtained materials have good biodegradation ability,these materials can be extensively utilized in agriculture and forestry manufacturing,city gardening,water conservation and the battle to drought and desertification.This paper summarizes the progress of super absorbent resin ready from modification of natural polymers,existing problems in utility are discussed and further growth prospects are proposed. Some distinct components influencing the properties of the product had been obtained and the product was evaluated. 100% application of fertilizer (F3) had obtained the utmost spike weight, above ground biomass, 100 seed weight and grain in each 2016 and 2017. Our knowledge have shown that the applied SAP had a remarkable impact on corn growth and yield underneath totally different fertilization treatments, and its utility of 30 kg/ha gave the most effective corn production index. Based on the leaf water potential, there was very significant distinction between 0.5% HB1 and 0.25% HB1 remedies and there was no vital difference between other treatments of the three ranges, HB1 of 0.25%, 0.50% and 0.75%. There was no important difference among 0.5% HB2 with plant growth regulators, 0.5% HB3 (electrolyte fertilizer of divalent cation) and 0.5% HB1 (electrolyte fertilizer of monovalent cation).

The info on the leaf water potential and malondialdehyde(MDA) content material in leaf have been investigated and in contrast with 0.50% HB1.The connection and dynamic changes in different remedies have been analyzed. Additionally, these water beads are non-toxic, bio-degradable and subsequently surroundings-friendly, reusable and washable. Reference cement was employed following China National Standard GB/T 8076-2008. The main performance indexes of this cement are supplied in Table 1. The class I FA in accordance with China National Standard GB/T 1596-2005 was used as a mineral admixture. The impact of super absorbent polymer(SAP) on the compressive energy and shrinkage of alkali activated slag cement mortar was studied. SAP can enormously reduce the autogenous shrinkage of alkali activated slag cement mortar while it has little effect on absolute drying shrinkage, typically it might lead to a rise in absolute dry shrinkage. In this paper,analysis of the corn starch-acrylic acid graft super absorbent polymer is studied by electron microscope,scan electron microscope,infrared spectroscopy and X-ray diffraction.Other properties,comparable to water absorption velocity,water-holding capability,performance reutilization,water-retention and reabsorption of the soil are studied.The consequence exhibits that: starch granules can't be seen in the surface of polymer,and haven't any results in water absorption.The most important issue to water absorption is the community structure formed by means of cross-linking.Then,water absorption and water-holding capability under excessive temperature and stress have been both superior.

Applying with the improper quantity can lead to dangerous effects, both no effect, or soil permeability compromised if excess super absorbent polymer is used. To beat gel for growing plants concerning water and nutrition in present sand-fixation expertise system,experiments have been carried out for 2 years in desert-simulating sand to review the influence of adding controlled release fertilizer(CRF) and super absorbent polymer(SAP) to cultivation system on the growth and development of liquorice(Glycyrrhiza uralensis).Results confirmed that different CRF had completely different effect on water absorbent charge of SAP and numerous CRF launched nutritional components in simulated sand rather more slowly than urea.Adding an amount of fertilizer to the technology system could immediate the growth and development of liquorice in shoot height,taproot length,lateral root quantity,development of leaf,biomass(dry weight) and nutritional parts(NPK) absorption.The current research confirmed that the expertise of including SAP and CRF was applicable and it also came upon a novel means to solve the problem of water and nutrition of sand-fixing plant.