Abstract:

Soil microbe is very important for terrestrial plants. Studies were conducted to compare the feedback of different sources of soil microbial community on the growth of noxious weeds Ageratina adenophora and tomatoes by sterilization of soil from Yunnan and Beijing. The results showed that the two types of soil were unfavorable for the growth of A. adenophora after sterilization. Specifically, for soil collected from a vegetable garden in Beijing, plant height and biomass of A. adenophora cultivated in sterilized soil were significantly lower than control. The plant biomass of A. adenophora was only 14.3% that of control. For soil collected from invaded area by A. adenophora in Yunnan, plant height and biomass of A. adenophora cultivated in sterilized soil were 58.1% and 42.9% that of control, respectively. However, plant height and biomass of tomato cultivated in soil from the vegetable garden after sterilization were 226.9% and 644.5% that of control, respectively. The plant height and biomass of tomato cultivated in soil from Yunnan after sterilization were 94.6% and 88.7% that of control respectively, which showed no significant differences. Our findings suggested that for different sources of soil, their sterilization had different feedbacks for the growth of invasive weed A. adenophora and common vegetable crop tomato.