Longterm continuous straw mulch no tillage increased soil total and active microbial biomass and activities.Tillage methods influenced soil bacterial and fungal biomass and activities.Conventional tillage increased so...Longterm continuous straw mulch no tillage increased soil total and active microbial biomass and activities.Tillage methods influenced soil bacterial and fungal biomass and activities.Conventional tillage increased soil bacterial biomass,but the shapes and distributions of soil bacteria differed insignificantly for different tillage soils.No tillage increased soil total and active hyphal length and biomass.The bacterial and fungal contributions to respiration differed remarkably for tillage method experimental soils.Conventional tillage surface soil layer concentrated largely fungal component,while no tillage soil had much bacterial activities.It showed that soil microbial activity and is not consistent with biomass and its composition in different tillage method soils.展开更多
Soil protozoan is the third largest taxon in soil biota and an important biological regulator for soil organisms and biochemical activities because of its biodiversity predacity and enormous biomass in soil. Different...Soil protozoan is the third largest taxon in soil biota and an important biological regulator for soil organisms and biochemical activities because of its biodiversity predacity and enormous biomass in soil. Different trophic types such as photosynthetic autroph, saprotroph and predacity existed in protozoan. Since predation not only controls the bacteria community but also stimulate nutrient transformation and carbon cycling, the study on protozoan community structure and ecological function is one of the bases for elucidating the soil fertility. The article reviewed the research progresses in protozoan community, trophic types, ecological function and application in soil.展开更多
文摘Longterm continuous straw mulch no tillage increased soil total and active microbial biomass and activities.Tillage methods influenced soil bacterial and fungal biomass and activities.Conventional tillage increased soil bacterial biomass,but the shapes and distributions of soil bacteria differed insignificantly for different tillage soils.No tillage increased soil total and active hyphal length and biomass.The bacterial and fungal contributions to respiration differed remarkably for tillage method experimental soils.Conventional tillage surface soil layer concentrated largely fungal component,while no tillage soil had much bacterial activities.It showed that soil microbial activity and is not consistent with biomass and its composition in different tillage method soils.
文摘Soil protozoan is the third largest taxon in soil biota and an important biological regulator for soil organisms and biochemical activities because of its biodiversity predacity and enormous biomass in soil. Different trophic types such as photosynthetic autroph, saprotroph and predacity existed in protozoan. Since predation not only controls the bacteria community but also stimulate nutrient transformation and carbon cycling, the study on protozoan community structure and ecological function is one of the bases for elucidating the soil fertility. The article reviewed the research progresses in protozoan community, trophic types, ecological function and application in soil.
