Application of kitchen organic source soil conditioner in cadmium reduction of Chuanxiong Rhizoma(Chuanxiong)
Objective:To explore an efficient and environmentally friendly soil improvement measure to effectively reduce the cadmium content of Chuanxiong,and to provide experimental basis for ensuring the safety of Chuanxiong.Methods:In the first week of Chuanxiong cultivation,organic soil conditioner from kitchen was used for soil improvement,and different dosage treatments(JD1:300 kg·667 m-2,JD2:600 kg·667 m-2,JD3:900 kg·667 m-2)and control group(CK:Blank control,T1:traditional cultivation,T2:quicklime soil improvement)were used to investigate the cadmium content and effective soil cadmium content of Chuanxiong after harvesting.The agronomic traits,yield and active component content of Chuanxiong were investigated to analyze the effects of the soil conditioner on the cadmium content,growth,yield and active ingredients of Chuanxiong.Results:Kitchen organic source soil conditioner can significantly reduce the cadmium content of Chuanxiong and the effective cadmium content in the soil,with the best results in the JD2 group.Compared with CK group,the decrease was 22.22%and 23.08%respectively.Kitchen organic source soil conditioner can promote the growth and development of Chuanxiong,improve the height and tiller number of Chuanxiong strains,significantly increased the yield of Chuanxiong.The yield increased with the increase of the application amount of organic source soil conditioner in the kitchen.The JD1 group increased by 15.38%compared with the CK group,with the increase of 7.06%from T1 and 14.05%from T2.However,the yield difference between JD2 and JD3 was not significant.The kitchen organic source soil conditioner can significantly increase the content of Chuan-xiong alcohol soluble extract.Among them,the highest increase of JD2 group was 49.33%compared with CK.At the same time,other active ingredients of Chuanxiong,such as chlorogenic acid,lactone I,ferulic acid,lactone A and gaoben lactone were not significantly different from the control group.In conclusion,the most applicable method was JD2:600 kg·667 m-2.Conclusion:Kitchen organic source soil conditioner is green and efficient and has significant cadmium reduction effect on Chuanxiong,which can provide technical support for the integration of green planting technology with low cadmium enrichment of Chuanxiong.
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