作　　者： (张金燕）; (孙雪婷）; (龙光强）; (张广辉）; (孟珍贵）; (李龙根）; (杨生超）; (陈军文）;

机构地区： 西南中药材种质创新与利用国家地方联合工程研究中心,云南昆明650201 云南农业大学农学与生物技术学院,云南昆明650201

出　　处： 《广东农业科学》 2017年第6期27-38,共12页

摘　　要： 为研究三七[Panax notoginseng (Burk) F.H.Chen]残根对2年生三七生长的影响,在盆栽和水培两种栽培模式下,按不同比例添加三七须根粉,并定期观测其生长及抗氧化酶活性变化。结果发现,在盆栽处理30 d和水培条件下处理10 d,三七须根数随着三七须根粉添加量的增加而减少。盆栽和水培条件下,不添加三七须根粉和高比例添加三七须根粉处理下,三七须根和叶片中的POD活性相对较低;盆栽三七根系中SOD活性随着三七根系粉添加量的增加而降低,而水培条件下则恰好相反。盆栽和水培条件下,分别在三七须根粉添加量大于0.5 g/kg和0.1 g/L时,三七根系活力都有不同程度的升高,但根系活力随着试验处理天数的增加而呈下降趋势。三七采收过程中残留在土壤中的须根腐解释放的化学物质可能是导致三七自毒作用的潜在因素。 In order to analyze of the effects of residual roots decomposed on growth of two-year-old Panax notoginseng, the fibrous roots were added in the pot experiment and hydroponic experiment. The morphological index and enzyme activity were measured timely. The results showed that the number of fibrous root decreased with the increase of residual root addition in potted treatment for 30 days and hydroponic conditions for 10 days. The POD activity was relatively lower in fibrous roots and leaves of P. notoginseng which grew under treatments of pot experiment and hydroponic experiment without any addition or high proportion to addition of powdery fibrous roots. The SOD activity in fibrous roots of P. notoginseng which grew under pot condition decreased with the increase of additive amount of powdery fibrous roots, however, the contrary was found in hydroponic experiment. The root activity increased in various degrees under the condition of additive amount of powdery fibrous roots greater than 0.5 g/kg in pot experiment and 1 g/10 L in hydroponic experiment. But the root activity decreased with the increase of test processing days in all treatments. The results suggested that the release of chemical substances of roots left in soil in the process of harvesting may be another factor leading to autotoxicitv of P. notoginseng.

关 键 词： 三七 残根 植株形态 自毒作用 化感效应