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芒果叶片水提液对我国南方6种牧草的化感作用 被引量:4

Allelopathic effect of aqueous extract from Mangifera indica leaf on six pasture species in Southern China
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摘要 【目的】筛选出适宜在我国南方芒果园下间作的优质牧草品种,为探索并建立我国南方芒果园人工草地的最优化利用模式提供理论依据。【方法】采用生物测定法研究5个浓度梯度(1.00%、0.50%、0.20%、0.10%和0.05%)的芒果叶片水提液对我国南方6种牧草(色拉特罗大翼豆、羽扇豆、紫花苜蓿、热研2号柱花草、热研11号黑籽雀稗和多年生黑麦草)和两种模式受体植物(大豆和水稻)的化感作用。【结果】除个别受体植物对低浓度的芒果叶片水提液表现出化感促进作用外,大部分表现出明显的化感抑制作用,且处理浓度越高,抑制作用越强。不同受体植物对芒果叶片水提液的化感综合效应各异,芒果园下供试豆科牧草的适应性排序为:羽扇豆>紫花苜蓿>热研2号柱花草>色拉特罗大翼豆;禾本科牧草为:多年生黑麦草>热研11号黑籽雀稗。【结论】在南方芒果园下可首选羽扇豆和多年生黑麦草进行间种,其田间管理应注意及时防除杂草,并适时浇水施肥。 [Objective]The high-quality pasture species suitably interplanted with Mangifera indica in Southern Chi- na were screened in order to provide scientific references for establishing efficient utilization model of artificial grassland in M. indica orchard of Southern China. [Method]The allelopathie effects of aqueous extract from M. indica leaves at five different concentrations( 1.00%, 0.50%, 0.20%, 0.10% and 0.05%) on six important pasture species(viz. Macroptilium atropureum, Lupinus polyphyllus, Medicago sativa L., Stylosanthes guianensis Reyan 2, Paspalum atratum Reyan l 1 and Lolium perenne L) and two mode receptor plants( Glycine max L and Oryza glaberrima) were investigated by biological assay. [Result]Except that several receptor plants showed allelopathic promoting effect of aqueous extract from M. indiea leaves at low concentration, most of receptor plants showed obvious allelopathic inhibiting effect. More- over the inhibiting effect became greater with increasing concentration of aqueous extract. Therefore, the allelopathie synthesis effects of aqueous extract from M. indica leaves were different among tested receptor plants. As for all tested pasture species in M. indica orchard, their adaptability from strong to weak in order was L. polyphyllus〉M, sativa〉 S. guianensis〉M, atropureum in leguminosae and L. perenne〉P, atratum in gramineae. [Conclusion]L. polyphyllus and L. perenne are two most preferable interplanting pasture species in M. indica orchard, and specific attention should be paid to timely prevent and kill off weeds, water and fertilize suitably in field management.
出处 《南方农业学报》 CAS CSCD 北大核心 2015年第1期160-165,共6页 Journal of Southern Agriculture
基金 广东省林业科技创新专项项目(2012KJCX015-02) 肇庆市科技计划项目(2012N005)
关键词 芒果园 芒果叶片水提液 牧草 化感作用 化感效应综合指数 Mangifera indica orchard aqueous extract from Mangifera indica leaf pasturage allelopathy allelo- pathic effect synthesis index
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