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OA北大核心CSTPCD
Effects of two kinds of tree litter leaf extracts on the growth and rhizosphere soil enzyme activity of Festuca arundinacea
为探讨林木落叶浸提液对高羊茅(Festuca arundinacea)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(T1)、40(T2)、80 g·L-1(T3),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,T3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,T3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T1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(T1),40(T2),and 80 g·L-1(T3)]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 T3 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 T3 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),a-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 T1 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 litter leaf extracts had a significant inhibitory effect on the height,root length,and chlorophyll content of F.arundinacea.Additionally,the allelopathic inhibitory effect of the litter leaf extract from G.biloba was stronger than that from A.palmatum.
汪琼;闻永慧;辛培尧
西南林业大学园林园艺学院,云南昆明 650224
抗氧化酶植物生长化感作用土壤性质植物配置
antioxidant enzymeplant growthallelopathysoil propertiesplant configuration
《草业科学》 2024 (006)
1288-1296 / 9
科技人才与平台计划项目(院士专家工作站)(202205AF150022)
评论