无氯型环保融雪剂对种子发芽及植株生长的影响

Effects of Non-chlorine Environmental-friendly Snow-melting Agents on Seed Germination and Plant Growth

为探究无氯型融雪剂对植物生长的潜在影响,该文以小麦和早熟禾种子及1年生冬青幼苗为对象,通过比较新型融雪剂(XH-1、XH-2)和传统氯盐融雪剂(CT)在不同浓度条件下,种子发芽率和叶片丙二醛、叶绿素、叶绿素荧光参数(F_(v)/F_(m))等变化特征,评估了无氯型环保融雪剂对植物抗逆性能的潜在影响。结果表明:3种融雪剂均对种子萌发产生一定影响,CT、XH-1、XH-2处理后的种子发芽率依次升高,种子发芽率与融雪剂浓度呈显著负相关;实验进行20 d时,CT(所有剂量)、XH-1(所有剂量)以及较高浓度的XH-2(15、25和35 g/L)胁迫的冬青生长受到不同程度的抑制(抑制程度CT>XH-1>XH-2),叶片中丙二醛增加,但叶绿素及F_(v)/F_(m)降低,而低浓度(5 g/L)的XH-2胁迫的冬青生理指标则呈相反变化,表明其对冬青生长有促进作用。

In order to explore the potential impact of non-chlorine snow-melting agents on plant growth,wheat seeds,Kentucky bluegrass seeds and 1-year-old holly seedlings were taken as the research objects.By comparing the characteristics of seeds germination rate,malondialdehyde,chlorophyll and chlorophyll fluorescence parameter F_(v)/F_(m) of new snow-melting agents(XH-1,XH-2)and traditional chlorine salt snow-melting agent(CT)at different concentrations,the potential effect of non-chlorine environmental-friendly snow-melting agents on plants stress resistance were evaluated.The results showed that the seeds germination were affected by three kinds of snow-melting agents,and the order of influence in descending order was CT,XH-1,XH-2.The germination rate of seeds treated with CT,XH-1 and XH-2 increased in turn,and there was a significant negative correlation between the seeds germination percentage and the concentration of snow-melting agents.After 20 days of experiment,the growth of holly seedlings under the stress of CT(all doses),XH-1(all doses)and higher concentra⁃tions(15,25 and 35 g/L)of XH-2 were inhibited to varying degrees(inhibition degree CT>XH-1>XH-2).The malondialde⁃hyde content in the leaves increased,the chlorophyll content and F_(v)/F_(m) decreased.However,physiological indexes of holly seedlings under low concentration(5 g/L)XH-2 stress changed on the contrary,and the growth were promoted.