Effects of Wheat Root Exudates on Bitter Gourd Seeding Growth and Soil Environment
In order to solve the problem of continuous cropping in bitter gourd,the bitter gourd seedlings was treated with allelopathic wheat root exudates,and the changes of enzyme activity and microbial diversity of bitter gourd rhizosphere soil were analyzed compared with untreated varieties.The results showed that the plant height,stem diameter,root length and biomass of 3 bitter gourd materials treated by the wheat root exudates was higher than the control with a significant or extremely significant difference,and the plant height and stem diameter especially showed an increasing trend over growth days.The plant height and stem diameter of the treatment groups increased by 7.32%,14.67%,19.98%and 7.98%,8.24%,10.89%at 5,10 and 15 d,respectively.The root length,fresh weight of aerial part and root,shoot and root dry matter weight of treatment groups increased by 16.29%,18.08%,33.74%,31.70%and 27.21%,respectively.And there was a significant or extremely significant difference in the activity of urease,polyphenol oxidase,transferase and catalase in rhizosphere soil of bitter gourd seedlings between treatment group and control group with increase of 84.88%,35.68%,443.73%and 54.39%,respectively.The amount and richness of bacteria and actinomycetes increased,while fungi and fusarium oxysporum decreased,mainly the potentially pathogenic fusarium genus.In conclusion,wheat root exudates could improve soil enzyme activity,improve soil biological environment,promote the growth of bitter melon plants,and change the adverse ecological effects of continuous cultivation of bitter gourd.
万方数据
维普
