Changes In Soil Microorganisms Under Bamboo Plantation Covered With Tobacco Straw

The study was about the in bamboo forests which was covered by tobacco straw with bird feces. The soil microbial and soil biomass were determinated to analyze change-rulers of the soil microbial in bamboo forests which was covered by tobacco straw, with a view to find the ratio of tobacco straw and poultry manure that can promote the effect of straw. The culture microbial plate method was used to determine the number of soil microbes; chloroform fumigation was used for microbial biomass.Several results were found :( 1) the seasonal variation and the total number of soil microorganisms did not affect each other obviously. The ratio of tobacco straw and poultry manure had significant impacts on the total number of microorganisms. Tobacco straw and chicken manure with ratio of 9:1 and 4:1 had no significant impact on the vertical distribution of the soil microbial, and ratio of 1:1 and 7;3 the total had particularly significant difference;(2) The seasonal variation did not affect the number of bacteria significantly. On the soil surface, bacteria had the highest activity in the treatment with rice straw covered the surface. In the treatment with the ratio of 7:4 and 1:1 is relatively high to bacterial activity, the treatment with pure tobacco straw mulch had the minimum bacterial activity. At 10-20cm, the treatment dealing with tobacco had the highest bacterial activity, and with the ratio of 1:1, 7:3 and 4:1 had the second activity of bacteria. The different ratios of tobacco straw and chicken manure had great differences in the activity of soil bacteria at 10-20cm.Different treatments had no significant impact on the soil bacteria below 20cm;(3)Different treatments had no significant impact on the number of antinomies, because the difference between the different treatments were not obvious. Seasonal variation had impact significant on antinomies quantitative at 10-20cm ;( 4) Seasonal variation had no significant impact on change of soil fungi number. The treatment with ratio of 7:3 had the highest fungi activity, the treatment with ratio of 9:1 followed by; the treatment with ratio of 1:1 had the minimum fungal activity. Pure tobacco straw mulch treatment had the highest activity at 10-20cm, and chicken manure would reduce the soil fungi activity. Different treatments did not significantly affect the number of soil fungus below 20cm;(5)Different treatments did not have a significant effect on the changes of microbial biomass C, the seasonal variation affected the changes of soil microbial biomass C significantly. Different treatments and seasonal changes did not have significant effect on changes of soil microbial biomass C, neither did soil microbial biomass P;(6) Different treatments and seasonal variation did not affect significantly on soil microbial biomass C, N and P. Tobacco straw and chicken manure had a positive effect on soil carbon and nitrogen. It was good at bamboo absorption C,N,P; (7)On the soil surface, as the low temperature in winter and spring, the number of antinomies and microbial biomass C were significantly positive correlated. The number of antinomies and microbial biomass N were significantly negative correlated. The number of fungi and soil microbial biomass C were significantly negatively correlated in winter. The soil microbial biomass P was significantly related to the number of bacteria in summer. In winter the soil microbial biomass C was significantly negative correlated to the number of bacteria. At 10-20cm, the number of bacteria and microbial biomass C had a very significant positive correlation in spring. In spring and summer the number of fungi and microbial biomass N were significantly correlated, and it was negative correlated in summer. Below 20cm, the number of bacteria and microbial biomass C and N and P were significantly correlated in winter, the number of soil microbial biomass N was significantly related to the number of bacteria, so was the total number of soil microbial. There was a significantly negative correlation between the number of actinomycetes and microbial biomass N in autumn. In spring, microbial biomass P had a significant relationship with the number of actinomycetes. The number of fungi and soil microbial biomass P had a negative correlation; in summer the relationship between the number of fungi and fungi was significantly correlated; in autumn the number of fungi and microbial biomass N had a significant negative correlation. Tobacco straw mulch played an important role in the changes of soil microbial on Moso. Adding chicken manure into tobacco straw played a positive role in soil microbial activity and soil microbialbiomass.Because of the only small straw and chicken manure on tobacco with the proportion of the few settings, the lack of difference in the proportion of the wider settings, we could not find a fit ratio for the Moso.