Studies on Soil Characteristics in the Root Zone of Chinese Fir. I Comparative Study of Soil Chemical Properties Between the Rhizosphere and the Bulk Soil.
Studies on Soil Characteristics in the Root Zone of Chinese Fir. I Comparative Study of Soil Chemical Properties Between the Rhizosphere and the Bulk Soil.
Soil samples were collected in 4 replicates and divided a depth of 50 cm into 5 sections,i. e. 0-10,10-20,20-30,30-40 and 40-50 cm in the rhizosphere of each plant in two representative sites from north to south in Mu Us sandland.
This paper reviewed the mechanism that the soil rhizosphere microorganism, rhizosphere pH, root exudates, mycorrhizae, and phosphatase in the rhizosphere soil to improve the phosphorus using efficiency.
Major result is as follows: 1 . The quantity and dynamic changes of tobacco soil rhizosphere main bacterium physiology group and its biochemistry intensityThe quantity of ammoniation bacterium and the ammoniation intensity are lower in the initial period;
It is also found that Maimai weed had a strong capability of absorbing Mn, which is a major competitor with wheat to the Mn absorption in soil rhizosphere.
AM inoculation also promoted the active and total absorption area of root system and absorption of phosphorus from the rhizosphere, enhanced the content of soluble sugar in leaves and roots, and reduced proline content in leaves.
To model the carbon cycle and predict the carbon source/sink of forest ecosystems, we must first understand the relative contributions of root/rhizosphere and microbial respiration to total soil respiration under elevated CO2 concentrations.
AM inoculation also promoted the active and total absorption area of root system and absorption of phosphorus from the rhizosphere, enhanced the content of soluble sugar in leaves and roots, and reduced proline content in leaves.
It was shown that phytoremediation of soil polluted with phenanthrene in the rhizosphere of barley (Hordeum sativum L.) was inefficient in the absence of the degrading strains.
A considerable amount of 13C (up to 96% of the total amount of the label found in the rhizosphere soil) was incorporated into the biomass of the rhizosphere microorganisms.
It is shown that from non-rhizosphere soil to rhizosphere soil to root surface to root region the numbers of azotobacter increase sharply, and the rhizosphere effects of azotobacter are very obvious.
Significantly, these bacteria isolated from composts and macrofauna solubilized rock phosphate in the presence of various pure carbon substrates and crop residues and their importance in soil/rhizosphere conditions is discussed.
A study was conducted in Mississippi from 1995 to 1997 comparing soil rhizosphere fungi isolated from Pioneer 3167 hybrid maize (Zea mays L.) planted on Brooksville silty clay and Memphis silt loam soils.
Roots are very complicated morphologically and physiologically, and their metabolites are often released in large quantities into the soil rhizosphere from living root hairs or fibrous root systems.
The agronomic impact of genetically tagged azospirilla (Azospirillum brasilense)was assessed in open field and their fluctuation were monitored in the soil/rhizosphere.