不同保水剂对基质保水性和黄瓜幼苗生长的影响

Effect of different super absorbent polymers on media water retention and cucumber seedlings growth in a soilless medium

在温室条件下,采用不同种类与不同粒径的保水剂,应用于自制无土栽培基质,设置系列保水剂施用量,盆栽黄瓜进行水分耗竭试验。对不同处理的累积失水曲线、株高、干重、水分利用效率的分析表明,在生长时间一致的情况下,随着保水剂施用量的增加,基质的累积失水量减少,基质保水性能增强,幼苗表现出萎蔫的时间滞后;植物生长初期大量施用保水剂对植株生长有抑制作用,但是随着生长时间延长,保水剂又促进了植株生长。保水剂对植株干重、水分利用效率的影响效果因保水剂种类、粒径以及施用量而异。桑松牌保水剂(KL、B)的应用效果明显优于科翰高分子吸水树脂(KH)和淀粉接枝保水剂(D)。桑松牌保水剂粗粒(KL)效果优于细粒(B)。

Water exhausted experiments were conducted to evaluate the effect of different type and particle super absorbent polymers to a soilless growth medium by designing a series of super absorbent polymers application rates on cucumber seedlings in a green house.The cumulative water loss curve,plant height,dry weight,water use efficiency were measured.The results were as follows:accumulated water loss of the treated growth medium decreased and water retention increased with super absorbent polymers application.At early growing period,high application rates suppressed,but as time went on,promoted plants growth.The effect of super absorbent polymers on dry matter and water use efficiency of plant varied with different polymers type,particle and application rate.The applied effect of Mulpine super absorbent polymers(KL,B)were evidently superior to Kehan Resin (KH) and starch poly acrylonitrile graft copolymers (D).In Mulpin super absorbent polymers,effect of bigger particle (KL) was better than smaller particle(B).