毛竹根系、新鲜枝叶、凋落物及土壤浸提液对浙贝母的化感作用  

Allelopathic effects of Phyllostachys edulis extracts on Fritillaria thunbergii

作　　者：吴海平 叶根华 李伟成 WU Haiping;YE Genhua;LI Weicheng(East China Inventory and Planning Institute,National Forestry and Grassland Administration,Hangzhou 310019,Zhejiang,China;Ecological Forest Development Center of Songyang County,Lishui 323400,Zhejiang,China)

机构地区：[1]国家林业和草原局华东调查规划院,浙江杭州310019 [2]松阳县生态林业发展中心,浙江丽水323400

出　　处：《浙江农林大学学报》2023年第3期648-657,共10页Journal of Zhejiang A&F University

基　　金：浙江省省院合作项目(2015SY06);浙江省科技计划项目(2016F50008)。

摘　　要：【目的】探讨毛竹Phyllostachys edulis根系、新鲜枝叶、凋落物及土壤浸提液对浙贝母Fritillaria thunbergii的化感作用,筛选毛竹-药用植物复合经营体系的适生经济物种。【方法】选择药用植物浙贝母作为目标植物,开展不同质量浓度(0.005、0.010、0.020、0.050和0.100 kg·L^(-1))毛竹(根系、新鲜枝叶、凋落物和0~20 cm土壤浸提液)的化感作用试验。【结果】①根系浸提液对浙贝母的生长性状(株高、生物量和叶面积)、光合色素(叶绿素a、叶绿素b、叶绿素a+b)和药效成分的影响表现为“低促高抑”的效应。②新鲜枝叶、凋落物和土壤浸提液对浙贝母生长性状、光合色素和药效成分表现为促进作用,提高了叶面积的同时亦可提升直射光和漫射光的吸收能力,有利于浙贝母在弱光环境下生长;浙贝母最大净光合速率、光饱和点在这3种浸提液处理下,随着浸提液质量浓度增加表现为先升高后下降,同时增加了表观量子效率,降低了光补偿点,表明毛竹浸提液改变了浙贝母对光能的利用率和光强吸收范围。③根系浸提液对浙贝母的化感综合效应最强,土壤浸提液最弱。④高质量浓度根系浸提液处理时,浙贝母丙二醛质量摩尔浓度增加,表明浙贝母受到一定的环境胁迫。【结论】浙贝母可适应除高质量浓度根系浸提液外的其他浸提液浇灌,且可提升生物量和药效成分。建议开展整地作业,清理毛竹林死根鞭,有利于浙贝母的优质生长。图1表5参20。[Objective]The purpose is to explore the allelopathic effects of forest extract of Phyllostachys edulis on Fritillaria thunbergii,so as to screen the suitable economic species for compound management of Ph.edulis and medicinal plants.[Method]F.thunbergii was selected as the target plant to carry out the allelopathy experiments of different extracts of Ph.edulis forest(roots,fresh branches and leaves,litter and 0~20 cm soil)at different concentrations(0.005,0.010,0.020,0.050 and 0.100 kg·L^(-1)).[Result](1)The effects of root extract on the growth characters(plant height,biomass and leaf area),photosynthetic pigments(chlorophyll a,chlorophyll b and chlorophyll a+b)and active medicinal components(fritillarin A and fritillarin B)of F.thunbergii showed promotion at lower extract concentration while inhabitation at higher concentration.(2)Fresh branches and leaves,litter and soil extracts promoted the growth traits,photosynthetic pigments and active components,increased the leaf area and absorption capacity of direct and diffuse light,which was conducive to the growth of F.thunbergii under low light condition.The maximum net photosynthetic rate and light saturation point also increased under the treatment of these three extracts,which first increased and then decreased with the increase of the extract concentration.At the same time,the apparent quantum efficiency increased and the light compensation point decreased,indicating that Ph.edulis extracts changed the utilization rate of light energy and the absorption range of light intensity.(3)The comprehensive allelopathic effect of root extract on F.thunbergii was the strongest,while that of the soil extract was the weakest.(4)The MDA content increased when the root extract was in high concentration,indicating that F.thunbergii was under certain environmental stress.[Conclusion]F.thunbergii can adapt to the irrigation of other extracts except root extract of high concentration,and can improve biomass and active medicinal components.Land preparation and cleaning up the

关 键 词：浙贝母 光合作用 化感作用 林下经济 复合经营 

分 类 号：Q946[生物学—植物学]