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高吸水树脂作为土壤保水剂,从本世纪70年代开始逐步应用于农、林、园艺生产。我们以江西化工研究所研制的高吸水树脂为试材,在低丘红壤上进行了保水效应研究。试验分室内模拟、盆栽和田间三方面开展,结果证明:高吸水树脂在蒸馏水中的吸水倍数为其自身重量的416倍,与红壤混合后的首次吸水为111.4倍,重复吸水降至35.5倍。树脂所吸持的水分绝大部分为作物可利用的有效水。红壤中掺入0.3％树脂,土壤有效水保存时间约可延长4～6天。在田间施用中,由于树脂颗粒的吸水澎胀,对毛管水上升补给有一定的阻碍作用,早期上层土壤偏干,下层却能保蓄较丰富的水分。故采取地表浅施是适宜的。
Superabsorbent resin as a soil water retention agent, from the 70s of this century gradually applied to agriculture, forestry, horticulture production. We have developed by the Institute of Jiangxi Chemical Superabsorbent resin as a test material, the effect of water retention in the red soils red soil. The experiment was conducted in indoor simulation, potting and field. The results showed that the super absorbent resin had a water absorption multiple of 416 times its own weight in distilled water, the first water absorption after mixing with red soil was 111.4 times and the repeated water absorption decreased to 35.5 times. Most of the moisture held by the resin is available to the crop as effective water. Red soil incorporation of 0.3% resin, effective soil water storage time can be extended about 4 to 6 days. In the field application, due to the swelling of the resin particles, there is a certain impediment to the uplift of the capillary water. In the early upper soil, the soil is dry and the lower layer can save more water. Therefore, it is appropriate to adopt shallow surface application.