The continuous cropping obstacle of Panax notoginseng is serious, and effective control measures are lacking. Soil disinfection with chloropicrin(CP) has been proven to be effective in reducing the obstacles to continuous cropping of other crops. In order to ascertain the effect of CP in the continuous cropping of P. notoginseng, this paper explored the influences of CP at different treatment concentrations(0,30,40,50 kg/Mu, 1 Mu≈667 m~2) on soil macro-element nutrients, soil enzyme activity, growth and development of P. notoginseng, and the accumulation of medicinal components. The results showed that CP fumigation significantly increased the content of total nitrogen, alkali-hydrolyzable nitrogen, ammonium nitrogen, nitrate nitrogen, and available phosphorus in the soil, but it had no significant effect on potassium content. The soil protease activity showed a trend of first increasing and then decreasing with the prolonging of the treatment time. Both the soil urease and acid phosphatase activities showed a trend of first decreasing and then increasing with the prolonging of the treatment time. The higher the CP treatment concentration was, the lower the urease and acid phosphatase activities would be in the soil. The protease activity was relatively high after CP40 treatment, which was better than CP30 and CP50 treatments in promoting the nitrogen-phosphorus-potassium accumulation in P. notoginseng. The seedling survival rates after CP0, CP30, CP40, and CP50 tratments in October were 0, 65.56%, 89.44%, and 83.33%, respectively. Compared with the CP30 and CP50 treatments, CP40 treatment significantly facilitated the growth and development of P. notoginseng, the increase in fresh and dry weights, and the accumulation of root saponins. In summary, CP40 treatment accelerates the increase in soil nitrogen and phosphorus nutrients and their accumulation in P. notoginseng, elevates the seedling survival rate of P. notoginseng, enhances the growth and development of P. notoginseng, and promotes the accumulation of medicinal components. CP40 treatment is therefore recommended in production.

中文翻译：

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氯化苦熏蒸对土壤及三七生长发育的影响[J].

三七连作障碍严重，缺乏有效的防治措施。氯化苦（CP）的土壤消毒已被证明能有效减少其他作物连作的障碍。为明确CP对三七连作的影响，本文探讨了CP在不同处理浓度（0、30、40、50 kg/Mu，1 Mu≈667 m~2）下对土壤的影响。微量元素养分、土壤酶活性、三七生长发育、药用成分积累。结果表明，CP熏蒸显着提高了土壤中总氮、碱解氮、铵态氮、硝态氮和速效磷的含量，但对钾含量的影响不显着。随着处理时间的延长，土壤蛋白酶活性呈先升高后降低的趋势。随着处理时间的延长，土壤脲酶和酸性磷酸酶活性均呈现先下降后上升的趋势。CP处理浓度越高，土壤中脲酶和酸性磷酸酶活性越低。CP40处理后蛋白酶活性较高，在促进三七氮磷钾积累方面优于CP30和CP50处理。10月份CP0、CP30、CP40和CP50处理后的幼苗成活率分别为0、65.56%、89.44%和8​​3.33%。与CP30和CP50处理相比，CP40处理显着促进了三七的生长发育，鲜重和干重的增加，以及根皂苷的积累。综上所述，CP40处理加速了三七土壤氮磷养分的增加及其积累，提高了三七的幼苗成活率，促进了三七的生长发育，促进了药用成分的积累。因此，建议在生产中进行 CP40 处理。