摘要
试验就煤炭腐植酸对盐胁迫下能源草柳枝稷耐盐性的促进作用进行了研究。第1天取样后喷施腐植酸,并施用不同浓度梯度氯化钠溶液处理柳枝稷,3 d后氯化钠溶液浓度达最大值,第7天取样分析试验结果。结果表明,腐植酸处理对柳枝稷的耐盐性有促进作用,可以降低盐胁迫下柳枝稷叶片相对含水量、净光合速率、气孔导度、蒸腾速率和叶绿素含量的减少,还可以降低叶片电解质外渗的增加;腐植酸处理可以增加强盐胁迫下柳枝稷叶片超氧化物歧化酶、抗坏血酸过氧化物酶和过氧化氢酶的活性。试验表明,施用0.2%的腐植酸处理可以适当增强柳枝稷的耐盐性,处理后叶片相对含水量为73.9%、光合速率为13.536μmol/(m2·s)、蒸腾速率为0.128 g/(m2·h)、叶绿素含量为20 mg/g、超氧化物歧化酶活性为5.143 U,为试验中最适宜的腐植酸浓度。
In this study, the effects of humic acid on salt tolerance of Salix psammophila was studied. After the first day of sampling,humic acid was sprayed and switchgrass was treated with different concentrations of sodium chloride solution. After 3 days, the concentration of sodium chloride solution reached the maximum value, and the result of sampling was analyzed on the 7 th day. The results showed that humic acid treatment could promote the salt tolerance of switchgrass and increase the relative water content, net photosynthetic rate, stomatal conductance, transpiration rate and chlorophyll content of switchgrass under salt stress, but also appropriately reduce the electrolyte leakage of switchgrass,humic acid treatment increased the activities of superoxide dismutase,ascorbate peroxidase and catalase in the leaves of switchgrass under strong salt stress. The results showed that 0.2% humic acid treatment could enhance the salt tolerance of switchgrass. The relative water content of leaves was 73.9%, the photosynthetic rate was 13.536 μmol/（m2·s）,the transpiration rate was 0.128 g/（m2·h）, the content of chlorophyll was 20 mg/g, and the content of superoxide dismutase was5.143 U, which was the most suitable humic acid concentration in the experiment.
出处
《山西农业科学》
2018年第2期187-192,共6页
Journal of Shanxi Agricultural Sciences
基金
中拉合作煤炭腐殖酸水溶肥研制与开发(201703D421001)
2017年山西省农业科学院农业科技创新研究课题(第一批)(YGG17040)
关键词
腐植酸
柳枝稷
叶片电解质外渗
光合参数
抗氧化酶活性
humic acid
switchgrass
EC
photosynthetic parameters
the activity antioxidant enzyme
