Microbial and Enzyme Activities in Tomato Rhizosphere with Organic Soil Cultivation in Solar Greenhouse

Organic medium cultivation system was a new technique characterized by low cost,easy operation and fitting Chinese national conditions.In order to investigate microorganisms' quantities and enzyme activities,an experiment was conducted using organic substrate culture added with corn stalk,wheat straw,mushroom residue or saw dust and dry dung.The results showed that there were great differences with the amount of fungi,actinomyces,nitrifiers,ammonifi and cellulolytic bacteria in different substrates,and obviously increased with the development of tomato.The advantages of microorganisms were denitrifying bacteria and hydrazine bacteria.Microbial activity were increased first but decreased after planting for 110 days.T3 behaved the highest of microorganisms quantities and enzyme activities compared to the other treatments.Urease activities,cellulose activities and phosphatase activities were enhanced by 4.76%-147.6%,11.48%-101.6% and 14.29%-189.3%,respectively.The microbial quantities and enzyme activities could be improved efficiently with increasing of soil organic matter.In conclusion,the number of rhizosphere microorganisms and enzyme activities were affected by both the development of tomato and soil proporties.It was also demonstrated that the most suitable organic soil formula was manure: corn stalk: sawdust= 1∶2∶1 among the treatments.