摘要
为探讨三七皂苷单体的化感自毒作用,将3种不同的皂苷单体(人参皂苷Rg_1、Rb_1、三七皂苷R_1)分别添加到灭菌和未灭菌的土壤中,研究其在不同土壤介质中对三七种子萌发及幼苗生长的影响及差异。结果表明:(1)灭菌后的土壤更有利于三七生长,发芽率、发芽势、茎粗、最长根长等指标均有显著提高。(2)人参皂苷Rg_1和Rb_1对三七的种子萌发和幼苗生长均有不同程度的抑制作用;三七皂苷R_1对三七种子萌发具有一定的抑制作用,但对三七幼苗生长表现为促进作用。3种皂苷单体的综合化感效应由强别弱依次为:人参皂苷Rb_1(-0.274)>人参皂苷Rg_1(-0.112)>三七皂苷R_1(0.004),人参皂苷Rb_1的化感抑制效应最强。(3)土壤灭菌状况和皂苷单体种类互作对三七幼苗茎粗、苗高、叶片数3个指标有显著影响。土壤微生物与皂苷协同互作,进而加剧了三七的自毒作用,是导致三七连作障碍的重要原因之一。
With saponins as donors,the autotoxicity effect of P. notoginseng was analyzed.Saponins were added to the sterilized and non-sterilized soil to investigate the germination and seedling growth of P. notoginseng in various soil media.The results were as follows：（ 1） Sterilized soil was more conducive to the growth of P.notoginseng,its germination potential,stem diameter,the longest root and other indicators improved significantly.（ 2） Seed germination,seedling growth were suppressed by ginsenosides Rg_1 and ginsenosides Rb_1.Ginsenosides Rg_1 had inhibitory effect on seed germination,but enhanced the growth of seedlings. Comprehensive allelopathic effect of the three kinds of saponins were as follows： ginsenoside Rb_1（-0.274） 〉ginsenosides Rg_1（-0.112） 〉notoginsenoside R_1（ 0.004）.（ 3） Also,soil microbes and saponins interact,which showed significantly influence on seedling stem diameter,height and number of leaves were different under different conditions.It can be concluded that there＇s quite obviously a lot of synergy between the soil microbial biomass and ginsenoside,which contributes to autotoxicity effect,being a significant obstacle to continuous cropping.
出处
《江西农业大学学报》
CAS
CSCD
北大核心
2015年第6期988-993,共6页
Acta Agriculturae Universitatis Jiangxiensis
基金
国家自然科学基金项目(81102751)
