高分子树脂保水效果研究

Effect of a water absorbing resin on soil moisture retention

采用田间小区试验和室内模拟试验相结合的方法 ,研究了高分子吸水树脂 IM- 4 0 0对保持土壤水分、抑制土壤水分蒸发的效果。研究结果表明 ,该吸水树脂能有效地减少土壤水分蒸发。在田间小区试验条件下 ,种植玉米施用树脂可减少坐水量 6 0 %～ 80 % ,在播后 6 0 d内无明显降水情况下 ,土壤水分比对照高 2 .4 1个百分点。在室内条件下 ,高分子树脂显著降低了土壤水分蒸发量 ,对砂土效果尤为明显。试验结果还证明 ,这种树脂可以反复吸水保水 ,有效时间可达 2个月以上 。

Plot and laboratory experiments were condulted to study the effects of a water-absorbing resin,IM-400,on soil water evaporation and retention.Results showed that IM-400 could reduce soil water evaporation markedly. In plot experiment,addition of IM-400 saved 60%～80% of seed water under the condition that no obvious rain fall occarred for 60 days after sowing of corn,water content in plots treated with IM-400 was 2.41 percent points higher than that in untreated plots.In laboratory experiment,IM-400 lowed soil water evaporation rates effectively,especially with sandy soil.The results also indicated that IM-400 can absorb and release water in soil repeatedly,and its effects can last for more than 2 months.This guarantees the water supply for seed germination and seeding growth.$$$$