Nitrification in soil is carried out predominantly by
autotrophic ammonia-oxidising bacteria (AOB) of the genera Nitrosomonas, Nitrosopira, and Nitrosococcus, which convert N[H.sub.3] to N[O.sub.2.sup.-], and bacteria of the genus Nitrobacter, which convert N[O.sub.2.sup.-] to N[O.sub.3.sup.-].
Simultaneous biological nutrient removal: Evaluation of
autotrophic denitrification, heterotrophic nitrification, and biological phosphorus removal in full-scale systems.
The second objective of this study was to quantify genetic variation among maize inbred lines in their responses to cold stress during an early
autotrophic phase of development.
Phoradendron juniperinum are
autotrophic hemiparasites (Kuijt 1969; Calder and Bernhardt 1983; Lei 1999), but must acquire water and mineral nutrients from its J.
In fact, the development of techniques such as electron and fluorescence microscopy have shown that virus, bacteria, and other
autotrophic or heterotrophic microorganisms of the size that is now collectively known as picoplankton (< 0.00008 in [< 2 [micro]m]) and nanoplankton (between 0.00008 and 0.0008 in [2 and 20 [micro]m]), are well represented in Antarctic waters, where their role may be as important as it is in temperate regions.
Recent comparative analyses have shown that there is a systematic decrease in the relative proportion of heterotrophic biomass in the plankton as the
autotrophic component of the system becomes more productive.
The presence of genes that could contribute to
autotrophic growth, for example, nitrogenase and CODH-ACS in clade 1 containing Mbb.
Samples of water were collected during the last four weeks of the culture to quantify Vibrio, total heterotrophic bacteria (THB), and total
autotrophic bacteria (TAB).
Nitrification in agricultural systems is thought to be mostly carried out by
autotrophic bacteria (Jia and Conrad 2009), although some
autotrophic archaca and heterotrophs can also nitrify.
The alga has a rapid growth and can be cultured simply and economical under
autotrophic conditions.
Zhang [16] and Okabe [17], reported that the presence of high concentration of CODfil inhibits nitrification as COD heterotrophic oxidizers outcompete
autotrophic nitrifies for DO since COD oxidizers have higher growth rates than nitrifies.
In contrast to chemical fertilizers which act directly on the
autotrophic food chain, organic fertilizers act mainly through the hetero-trophic food chain by supplying organic matter and detritus to the pond ecosystem; the manure serving principally as a substrate for the growth of bacteria and protozoa, which in turn serve as a protein rich food for other pond animals, including the cultured fish.
Whereas the cotyledons have the function of storing reserve substances to become
autotrophic seedling, so the presence of nutrient solution in the external environment becomes unnecessary for the in vitro germination of cambui tree.
However, C[O.sub.2] and DOC release in the presence of root respiration (cultivated peats) is expected to be lower as both processes are regulated by
autotrophic respiration and photosynthesis.
