Methane Oxidation and Nitrogen Transformations in Gray Forest Soilстатья
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Дата последнего поиска статьи во внешних источниках: 7 декабря 2017 г.
Аннотация:The samples of gray forest soil, taken from arable sites and from under a forest, were incubated under low (0.0006%) and increased (0.06, 0.6, and 6%) methane concentrations in the atmosphere. The oxidation rate of methane concentrations close to the atmospheric level comprised 0.024–051 ng CH4 / g soil per hour in the arable soil and 0.21–0.41 ng CH4/ soil per hour in the forest soil. The oxidation of increased methane concentrations occurred after a lag-period of 180 h in arable soils to 200–250 h in the soil under the forest. The
application of (NH4)2SO4 at a rate of 6 mg N/100 g decreased by 12–62% the activity of atmospheric methane oxidation in arable soil and did not affect the methane-oxidation activity of forest soil. The inhibiting effect of N−NH4 on the oxidation of increased methane concentrations was insignificant. It is demonstrated that the increase of methane concentrations to 0.06% stimulated nitrogen mineralization and nitrification, but the intensity
of these processes decreased under a high (6%) methane content. The results of this study demonstrate a close relationship between the processes of methane oxidation in gray forest soil and nitrogen transformation.