| In order to determine the amount of Superabsorbent, a pot experiment was conducted in Mizhi County, Shaanxi Province to study different amount of superabsorbent in May 2008.The experiment set different amount of Superabsorbent (0, 30, 40, 50 and 60 g) in five treatments and the ratio of Superabsorbent and loessal soil (0, 0.05%, 0.10%, 0.15%, 0.20% and 0.30%) in six treatments, to find out the relation of amount of superabsorbent, soil water suction and soil water content and the influence of different amount of superabsorbent on soil retention water time respectively.The results showed that, when high soil water content (>18%) , soil water suction of all treatments come to approach, when same soil water suction, soil water content would be longer when increasing the amount of superabsorbent;The survival time of maize were longer when the amount of superabsorbent were higher, the survival time of maize of both 0.2% and 0.3% treatments were 3 days longer compared with the control treatment;Integrated analysis indicated that the of superabsorbent and loessal soil with the ratio of 0.2% and 0.3% achieved remarkable effect in the experiment |