Effects of intercropping earthworms on soil heavy metal remediation and the yield and quality of fresh tomato
In order to explore the digestion of heavy metals in the soil by inter-cultivating earthworms and its effects on the yield and fruit quality of fresh tomato,the inter-cropping and interbreeding of fresh tomato Provence and earthworms were used as the treatment(T1),and the conventional planting was used as the control(CK).By measuring the changes in soil physicochemical properties and heavy metal content at different times,the yield of tomato and fruit quality were investigated and analyzed.The results showed that compared with CK,after 90 d of earthworm feeding,the soil pH decreased significantly,the content of total salt,organic matter,total nitrogen,total potassium,total phosphorus,hydro-lyzed nitrogen,available potassium,and the number of bacteria increased significantly by 212.7%,921.3%,358.5%,116.1%,312.4%,71.2% and 191.7%.respectively;after 150 d of earthworm feeding,the total amount of heavy metals such as lead,arsenic,chromium,nickel,cadmium,and mercury decreased by 53.8%;after the tomato matured,by measur-ing the yield and fruit quality indicators,the yield increased significantly by 7.7%,and the content of soluble sugar,vitamin C,lycopene,and calcium increased significantly by 0.41 percent point,13.6 mg·100 g-1,20.48 mg·kg-1,and 41.5 mg·kg-1,respectively.The nitrate content decreased significantly by 35.5%,and the total amino acid content increased significantly 1.18 percent point.In summary,inter-cultivating earthworms can significantly reduce the content of heavy metals in the soil,increase soil nutrients and quality,and can promote the increase in tomato yield and quality,laying a good theoretical foundation for further research and application of inter-cropping and interbreeding of fresh tomato and earthworms.
Fresh-eating tomatoRaising earthworms in setsHeavy metals in soilAmino acid
万方数据
维普
