两种乔木落叶浸提液对高羊茅幼苗生长和根际土壤酶活性的影响  

Effects of two kinds of tree litter leaf extracts on the growth and rhizosphere soil enzyme activity of Festuca arundinacea

作　　者：汪琼[1] 闻永慧 辛培尧[1] WANG Qiong;WEN Yonghui;XIN Peiyao(College of Landscape Gardening,Southwest Forestry University,Kunming 650224,Yunnan,China)

机构地区：[1]西南林业大学园林园艺学院,云南昆明650224

出　　处：《草业科学》2024年第6期1288-1296,共9页Pratacultural Science

基　　金：科技人才与平台计划项目(院士专家工作站)(202205AF150022)。

摘　　要：为探讨林木落叶浸提液对高羊茅(Festucaarundinacea)幼苗生长和根际土壤性质的影响,通过室内模拟试验,设置不同浓度银杏(Ginkgo biloba)、鸡爪槭(Acer palmatum)落叶浸提液[10(T_(1))、40(T2)、80 g·L^(-1)(T_(3)),以清水为对照]分别浇灌盆栽高羊茅幼苗,研究两种乔木落叶浸提液对高羊茅幼苗生长和根际土壤酶活性的影响。结果表明,在两种乔木落叶浸提液处理下,高羊茅过氧化氢酶(CAT)活性较对照变化不大。超氧化物歧化酶(SOD)、过氧化物酶(POD)活性随银杏落叶浸提液浓度的增加呈先升高后降低的变化趋势,而丙二醛(MDA)含量则呈先升高后降低再升高的趋势,T_(3)处理时,MDA含量较对照上升了60.33%;在鸡爪槭落叶浸提液处理下,高羊茅SOD活性逐渐降低,MDA含量呈先升高后降低趋势,POD活性随浸提液浓度增加呈先升高后降低再升高的趋势,T_(3)处理时,POD活性较对照上升了151.03%(P<0.05)。两种乔木落叶浸提液处理下高羊茅根际土壤木糖苷酶(XYL)、β-葡萄糖苷酶(BG)、α-葡萄糖苷酶(AG)和纤维二糖酶(CBH)、总酶活性较对照显著上升,而亮氨酸氨基肽酶(LAP)活性则先降低后升高,但各处理下LAP活性均低于对照,尤其在银杏、鸡爪槭落叶浸提液T_(1)处理时,LAP活性较对照分别降低了31.69%和70.40%,导致基质土壤氮素利用率低,显著降低高羊茅生长指标和生理指标。研究结果表明,两种乔木落叶浸提液对高羊茅幼苗株高、根长和叶绿素含量均有明显抑制作用,银杏落叶浸提液的化感抑制作用强于鸡爪槭。This study investigated whether tree leaf extract affected the growth of Festuca arundinacea and rhizosphere soil properties.Through laboratory simulation experiment,taking irrigation with fresh water as the control,different concentrations[10(T_(1)),40(T2),and 80 g·L−1(T_(3))]of tree litter leaf extracts from Ginkgo biloba and Acer palmatum were employed to irrigate F.arundinacea seedlings.The effects of two kinds of tree litter leaf extracts on the growth and rhizosphere soil enzyme activity of F.arundinacea seedlings were studied.The results were as follows:Compared with the control,the catalase(CAT)activity of F.arundinacea changed little under the treatment of two kinds of tree litter leaf extracts.Superoxide dismutase(SOD)and Peroxidase(POD)activity first increased and then decreased,but the content of malondialdehyde(MDA)content first increased,then decreased,and then increased with increasing G.biloba litter leaf extract concentrations.MDA content increased by 60.33% under T_(3) treatment compared to the control group.As the concentration of A.palmatum litter leaf extracts increased,the SOD activity of F.arundinacea gradually decreased,and the MDA content initially increased and then decreased.The POD activity first increased,then decreased,and then increased.Under T_(3) treatment,the POD activity increased by 151.03% compared to the control group(P<0.05).When F.arundinacea was treated with two kinds of tree litter leaf extracts,the xylosidase(XYL),β-Glucosidase(BG),α-Glucosidase(AG),cellobiohydrolase(CBH),and total soil enzyme(TSE)activity increased significantly compared to the control.However,leucine aminopeptidase(LAP)decreased first and then increased.Compared to the control,the LAP activity decreased to 31.69% and 70.40% under T_(1) treatment of G.biloba and A.palmatum litter leaf extracts respectively,which caused a low nitrogen utilization efficiency of substrate soil and significantly reduced growth and physiological indicators of F.arundinacea.The results indicated that two kinds of tree li

关 键 词：抗氧化酶 植物生长 化感作用 土壤性质 植物配置 

分 类 号：S54[农业科学—作物学] S154.2