连作对丹参生长的障碍效应

Obstacle Effect of Continuous Cropping on Salvia miltiorrhiza Growth

通过对1～4年不同连作年限地块丹参生长发育情况进行的连续调查分析,结果表明,连作严重危害丹参生长,主要表现在6～9月,丹参生长期的枯苗率大幅度上升,地上、地下部生长量下降,根系数量、直径和长度减小,产量降低。同时由于有效成分含量降低,根系外观畸形,造成商品率下降,从而影响丹参质量。通过对土壤pH测定发现,丹参连作障碍可能与土壤酸性增加有关。

Several investigation in field showed that the declination of quality and quantity were becoming obvious after a long term continuous cropping of Salvia miltiorrhiza Bunge.The main representation included the rate of dried seedling during June and September was increased,the output of up-part and down-part of Salvia miltiorrhiza was lessened,the amount of roots,diameter and the length of roots were reduced.Active principle of Salvia miltiorrhiza was cut down,shape of Salvia miltiorrhiza was deformity,etc.those factors lead quality of herbal drugs to lessen.According to analysis pH in continuous cropping soil,continuous cropping obstacle was related to soil acidity increasing in continuous cropping soil.