When potassium application is 0.375~1.125gk2o/kg soil in Lou soil, AM fungi infection and symbioses will get the best results, and infection rate can reach 74.0% (pot experiments), and 49.0% (field experiments).
The fixed NH + 4 capacity of all natural layers in lou soil was determined in this thesis,they were 482.2±10.4,1134.9±4.0 and 553.0±11.3 mg N/kg soil in overburden layer,claying horizen and loess parent material horizen respectively.
An antibiotic producing strain Streptomyces violaceusniger was isolated from soil sample, characterized and studied for antibacterial and antifungal activity profile.
These points can be estimated by introducing the soil factor (Ks) and tree species factor (Kt) to potential evapotranspiration with the Penman formula.
Root biomass, length, and the number of roots in every diameter class, for each soil layer and for each plant species, are regarded as observation variables.
The results show that most of the vertical distributions of plant roots belong to the type wherein the roots are concentrated in the topsoil layer (0-20 cm), far more than those in the lower soil layers.
Ecological Benefit of Reforestation in a Severely Degraded Red Soil Region
Exploitation of rare earth catalysts in polymer syntheses
The studies over forty years on rare earth catalysts in polymer syntheses of diene, alkyne, alkylene oxide, thiirane, carbon dioxide copolymerization, lactide, caprolactone, cyclic carbonate and so forth in China have been reviewed.
Synthesis and characterization of rare earth complexes with Phthalaldehyde-lysine Schiff base
The spectra indicate that the energy transfer takes place from the triplet excited state of MLCT (metal-to-ligand charge transfer) state for Sr2CeO4 (sensitizer) to the rare earth ions (activator).
Biological effect of rare-earth lanthanum nitrate on the growth of Escherichia coli B was studied using the calorimetric method.
Baldcypress should not be planted in drought-stricken soils.
Characteristics of the temperature coefficient, Q10, for the respiration of non-photosynthetic organs and soils of forest ecosys
The temperature coefficient, Q10 (fractional change in rate with a 10°C increase in temperature) describes the temperature sensitivity of soils, roots, and stems, as well as their possible performance in global warming processes.
The differences between woody organisms of stems, roots, and soils excluding roots were statistically significant (p>amp;lt;0.05), indicating that heterotrophic respiration from microorganism activity may be more sensitive to global warming.
The contents of aggregates of over 0.25 mm in two shrub land soils in the upper layer (0-20 cm) increased by 4.6% and 14.1% compared with farmland.
土
soil
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