ZHANG Yujun,WANG Puchang,SHANG Yishun,et al.Effects of Super Absorbent Polymers on Root Growth and Enzyme Activity in Rhizosphere Soil of Sophora davidii Seedlings in Panjiang[J].Northern Horticulture,2020,44(16):92-97.[doi:10.11937/bfyy.20194197]
保水剂对盘江白刺花幼苗根系生长及根际土壤酶活性的影响
- Title:
- Effects of Super Absorbent Polymers on Root Growth and Enzyme Activity in Rhizosphere Soil of Sophora davidii Seedlings in Panjiang
- 文献标志码:
- A
- 摘要:
- 以盘江白刺花为试材，通过盆栽试验，研究了添加0%、0.5%、1.0%、2.0%和3.0%浓度的钾盐型保水剂、沃特保水剂及农林抗旱保水剂处理对白刺花幼苗根系生长、根系分泌物含量与土壤酶活性的影响。结果表明：干旱胁迫下施用3种不同的保水剂均可有效提高白刺花幼苗的根长、根表面积和根体积，所有保水剂处理均显著高于对照CK，施用浓度越大则差异愈显著（P<0.05）；白刺花幼苗的根平均直径也随3种保水剂施用浓度的增大呈逐渐增加趋势，但仅在3种保水剂浓度为2.0%、3.0%以及沃特保水剂施用浓度为1.0%时显著高于对照CK（P<0.05），其余处理与对照CK差异不显著（P>0.05）；白刺花幼苗的根系活力在3种不同保水剂施用浓度为0.5%时均表现为显著高于对照CK（P<0.05），但之后随着施用浓度的增大，根系活力逐渐下降；施用保水剂对白刺花根系分泌物含量的增加具有促进作用，且施用量与3种分泌物含量均呈显著线性正相关关系；脱氢酶、多酚氧化酶和蔗糖酶活性在保水剂处理下均表现为显著高于对照CK（P<0.05），脲酶活性仅在3种保水剂施用浓度为0.5%、1.0%及农林抗旱保水剂施用浓度为2.0%时显著高于对照CK（P<0.05），其余处理与对照差异不显著（P>0.05）；在干旱条件下施用3种保水剂，以施用沃特保水剂更利于白刺花根系生长、根系分泌物增加及土壤酶活性增强。
- Abstract:
- Sophora davidii of Panjiang was taken as material,the effects of 0%，0.5%，1.0%，2.0% and 3.0% potassium salt-type super absorbent polymers，wote super absorbent and Agroforestry drought-resistant super absorbent polymers on the root growth，root exudate content and soil enzyme activity of Sophora davidii seedlings were investigated，respectively，using pot experiments.The results showed that the root length，root surface area and root volume of Sophora davidii seedlings increased effectively by applying the three different super absorbent polymers under drought stress.The effects of all the super absorbent polymers were significantly stronger than those of CK，showing a concentration-dependent manner (P<0.05).The average root diameter of Sophora davidii seedlings increased gradually with the increase in the concentration of the three super absorbent polymers.However，only when the concentration was 2.0%，3.0% and the concentration of wote super absorbent was 1.0%，average root diameter was significantly higher than that under CK (P<0.05).No significant differences were found in average root diameter between the other treatments and CK (P>0.05).The root activity of Sophora davidii seedlings was significantly higher than that under CK when the concentration of the three different super absorbent polymers was 0.5%，but then gradually decreased with the increase in concentration.The application of super absorbent polymers promoted the increase in root exudate content of Sophora davidii，and the application amount had a significantly positive linear correlation with the content of the three exudates.The activities of dehydrogenase，polyphenol oxidase and sucrose under super absorbent polymers treatment were significantly higher than those under CK，urease activity was significantly higher than that under CK only when the concentration of super absorbent polymer was 0.5% and 1.0% and the concentration of agricultural and forestry drought-resistant super absorbent polymer was 2.0% (P<0.05).There were no significant differences between other treatments and the control.Under drought，the application of wote super absorbent was more beneficial to the root growth，increased in root exudates and the improvement in soil enzyme activity of Sophora davidii.
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备注/Memo
第一作者简介：张宇君（1992-），女，贵州遵义人，硕士，研究实习员，现主要从事牧草种质资源研究及育种等工作。E-mail：zhangyj_92@163.com.责任作者：王普昶（1981-），男，内蒙巴彦淖尔人，博士，研究员，现主要从事草地生态等研究工作。E-mail：wangpuchang@163.com.基金项目：国家重点研发计划资助项目（2017YFD0502101-3）；贵州省科技支撑资助项目（黔科合支撑[2017]2586）。收稿日期：2019-11-06