摘要： 为研究水分胁迫下硅素对玉米苗期生理生化性状的影响，利用水分与硅肥的耦合效应，通过试验分析玉米苗期株高、叶面积、茎粗、根系长度、根系活力、丙二醛含量、脯氨酸含量、光合作用等生理生化性状指标。结果得出，在同一水分处理条件下随着施用硅素的增加，株高、叶面积、茎粗、根系长度、根系活力、叶绿素含量均有不同程度的增加，而丙二醛含量以及脯氨酸含量有不同程度的减小；在同一单硅酸浓度条件下，随着土壤相对含水量的增加，株高、叶面积、茎粗、根系长度、根系活力、叶绿素含量也均有不同程度的增加，丙二醛含量以及脯氨酸含量有不同程度的减小。表明施用硅素可以缓解玉米苗期水分胁迫的逆境，在相对含水量为75%，施用0.266 g/kg的单硅酸时玉米生长最好；在相对含水量为45%，施用0.133~0.266 g/kg单硅酸后，显著增强了玉米的抗逆性。
关键词:
水分胁迫,
硅素,
玉米,
生理生化性状
Abstract: For the study of water stress under the influence of silicon on physiological biochemical characters of maize seedling.Through the experimental analysis the physiological and biochemical indexes of maize seedling height,leaf area,stem diameter,root length,root activity,MDA content,proline content and photosynthesis so on.The results showed,in the same water treatments,with the increased of the content of silicon fertilizer,height,leaf area,stem diameter,root length,root activity,Chlorophyll content all increased,MDA content,proline content have decreased.In the same silicon treatments,with the increased of the content of water,height,leaf area,stem diameter,root length,root activity,Chlorophyll content all have increased,MDA content,proline content have decreased.In general,use silicon can be mitigated the adversity of corn seedling under water stress,corn will grow best in the relative water content of 75% and the density is 0.266 g/kg; Enhance the resistance of corn obviously when the relative water content of 45% and use silicon fertilizer 0.133-0.266 g/kg.
Key words:
Water stress,
Silicon,
Corn,
Physiological and biochemical characters
中图分类号:
林少雯, 刘树堂, 隋凯强, 皇甫呈惠. 水分胁迫下硅素对玉米苗期生理生化性状的影响[J]. 华北农学报, 2018, 33(1): 160-167. doi: 10.7668/hbnxb.2018.01.024.
LIN Shaowen, LIU Shutang, SUI Kaiqiang, HUANGFU Chenghui. Effects of Silicon on Corn Physiological and Biochemical Characters under the Conditions of Water Stress[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2018, 33(1): 160-167. doi: 10.7668/hbnxb.2018.01.024.