Aquasorb Study On The Impact Of Soil Water Movement Experiments

Based on the background of water storage and less rain , the fundamental problems of the application of SAP (super absorbent polymer) in agriculture were studied around its dynamic effect on soil water with different dosage used.The main contents are as follows: determination of water-holding properties of SAP, effects of different dosage used on soil swelling , soil water evaporation , soil water horizontal diffusion and soil water unidimensional vertical infiltration, effect of layer application of SAP on soil water vertical infiltrating.The intricate problems of infiltrating and soil water traveling rule in the presence of chemical matters were further probed through numerical simulation .The results indicated that:1. Three kinds of particle size SAP ability for absorbing deionized water are 293g/g(<0.2mm), 282 g/g(0.2-0.8mm)and 214g/g(0.8-2mm), while the ability of absorbing saline water was similar: 45-49g/g; There was no significant correlation with particle size and the absorbing rate decreased with the absorbing procedure;The particle size was important factor influencing absorbing rate; SAP could release water kept by itself under the natural condition. Water evaporation of SAP with large particle size decreased gradually with the change of the time, but water evaporation of SAP with small particle decreased after a stable stage; Water hold by SAP could not release easily under mechanical condition and water-holding rate was kept at 94% above with the rotate speed of 5000r/min and 7000r/min.But the larger the particle size was, the greater water-holding rate decreased with the increase of centrifugal intensity.2 . SAP apply into soil, after sobbing water, the soil volume of the treatment A, B, and C expansion rate increases 3.2%, 5.6% and 6.5% respectively compare with CK; the influence that SAP to the aggregate is: to >0.25 mm soil aggregate content, that the A, B and C increases 4% ,5% and 9% respectively than CK, it shows that the SAP has some promote effect to increase the content of the soil aggregate.3. The smaller the particle size was, the better the evaporation was inhibited before soil water evaporation. The larger the dosage used was, the longer stable evaporation time of soil water was; Soil water evaporation fluctuated at 25 ℃; Less application of SAP could accelerate the evaporation of soil water compared with the control when the particle size was 0.8-2mm.4. The larger the dosage used at its primary use was, the more obvious the effect of SAP on the relief of soil water horizon acceleration; Traveling distance of wetting front of soil water horizon movement decreased with increasing amount of SAP; The equation of I=at~b indicating the relationship of soil water accelerating infiltration and time was obtained by .The relationship...