Effects of Chlorella vulgaris powder on tomato seedling growth and soil properties

CHEN Ping; ZHANG Ziran; ZHANG Wei; ZHANG Zhihan; LÜ Xiaoyan; ZHAO Jiqiang; WANG Shaoli; LIU Baoyou

doi:10.16861/j.cnki.zggc.202423.0738

Abstract：In order to study the potential of Chlorella vulgaris powder as a biological fertilizer,the experiment used toma-to variety Hongfenjiaren as the material,and set up two application methods of leaf spray and root irrigation to explore the effects of different concentrations of C.vulgaris powder on tomato seedling growth index and soil properties.The re-sults showed that compared with the water control,the 500 times dilution of C.vulgaris powder had the best effect on the growth of tomato.After leaf spray and root irrigation,the plant height,leaf number,biomass and growth function were sig-nificantly increased by 2.90％-47.49％,and the effect of root irrigation was better than that of leaf spray.Compared with the biological fertilizer Yishibang and the compound fertilizer Macroelement Water Soluble Fertilizer,the 500 times dilu-tion of C.vulgaris powder also showed a significant increase in biomass and growth function.In terms of improving soil properties,the pH of soil decreased by 0.06 and 0.29,respectively,and the electrical conductivity decreased significantly by more than 8.31％after spray and root irrigation with 500 times dilution of C.vulgaris powder.The content of nitrogen in the aboveground and underground parts of the plant and the soil increased after application with C.vulgaris powder.The activities of sucrase,nitrate reductase,catalase,urease,polyphenol oxidase,peroxidase in soil increased significantly after C.vulgaris powder leaf spray and root irrigation.The results of this study confirmed that C.vulgaris powder leaf spray and root irrigation were suitable for tomato growth and soil improvement,which could provide experimental basis for the development and application of C.vulgaris powder and other biological fertilizers.