高吸水性树脂在农业上应用的基础研究

高吸水性树脂在土壤里的保水性能与其溶胀度一致。按保水性能顺序:IAC13(长春应化所)>KH841(中科院北京化学所)>兰州晶体(兰州应化所)。这种保水性能也和土壤种类有关,其顺序是:粗砂土>壤砂土>细砂土>砂壤土。树脂可影响土壤物理性状,增加土壤代换量,增加对肥料的吸附作用,减少化肥淋失。在无外源水栽培作物时树脂的掺入可延长生育日数,在自然条件下可改善生长环境,提高产量。树脂有效量为(0.25～0.75)%。但对某些果树,蔬菜等未看到明显效果。

A STUDY ON SOME BASIC PROPERTIES OF HIGH WATER-ABSORBING SYNTHETIC RESINS FOR AGRICULTURAL USE

3 high water-absorbing synthetic resins manufactured in China were studied. They are IAC13,KH841,and Lanzhou resin.Results obtained are summarized as follows. Swelling ratio(g/g)of those resins studied in distilled water was taken as their water retention capacities.Order of retention capacities of resins stu- died was found to be:IAC13>KH841>Langzhou rosin.Soil texture exerted a pronounced impact on the water retention capacity of resins.The effect of resins on water retention was most pronounced in coarse...