【摘要】 为实现对土地资源的合理利用,降低田间管理成本,从化感角度出发,对构建米槁-绿壳砂林药间作系统的可行性进行评价,为米槁林下作物套种提供理论支撑。本研究设置不同浓度的米槁果皮与叶片水浸提液处理绿壳砂种子和幼苗,观察其对绿壳砂的化感影响。结果表明:果皮与叶片高浓度水浸提液对绿壳砂种子有显著抑制作用(50 mg·m L^-1),绿壳砂的总生物量与苗高随着米槁果皮与叶片水浸提液浓度的增加,总体呈现出低促高抑的现象;米槁果皮水浸提液处理下,可溶性蛋白含量、游离脯氨酸含量、MDA含量显著下降,可溶性糖含量、土壤多酚氧化酶活性、脲酶活性显著上升;米槁叶片水浸提液处理下,MDA含量、SOD活性、脲酶活性显著上升,游离脯氨酸含量显著下降;采用GC-MS法从米槁果皮和叶片鉴定出92个化合物,其中7个与米槁的化感作用关系密切;米槁果皮与叶片对绿壳砂幼苗存在一定化感作用,但化感作用最强部位（果皮）不会在林下大量堆积;在米槁田间管理中及时清理米槁林下落果、落叶等凋落物,在米槁林下套种绿壳砂时采取幼苗移栽法,构建米槁-绿壳林药间作经营体系具有一定现实可行性。更多还原

【Abstract】 To realize the rational utilization of land resources and reduce cost of field management,the feasibility of a Cinnamomum migao and Aomum villosumt intercropping system was evaluated from the perspective of allelopathy,which would provide theoretical support for intercropping under C. migao plantations. In this study,seeds and seedlings of A. villosumt were treated by different concentrations of aqueous extracts of pericarps and leaves from C. migao to assess the allelopathic effects on A. villosumt. The results showed that pericarp and leaf aqueous extracts of C. migao at high concentration( 50 mg·m L^-1) had significant inhibitory effects on the A. villosumt seeds. The total biomass and seedling height of A. villosumt were promoted by low concentration but were inhibited by high concentration of aqueous extracts of pericarp and leaves of C.migao. At the treatment of pericarp aqueous extract,soluble protein,free proline and MDA contents decreased,while soluble sugar content,soil polyphenol oxidase activity,and urease activity increased. At the treatment of leaf aqueous extract,MDA content,SOD activity and urease activity increased,while free proline content decreased. In total,92 compounds identified by GC-MS were from the pericarps and leaves of C. migao,seven compounds out of which are closely related to the allelopathy of C. migao. Although both pericarp and leaf of C. migao had allelopathic effects on A. villosumt seedlings,but the most allelopathic parts（ pericarp） would not accumulate in large quantity in the forest floor. It is feasible to construct the intercropping system of C. migao-A. villosumt by timely cleaning up fruit and leaf litter of C. migao and interplanting A. villosumt in the understorey.更多还原