Carbon Transformation and Budget in Agroecosistems of Intensive CropRotations on Agrogray Soils of the Forest-Steppe Zone in the Baikal Region
The transformation of carbon in agroecosystems on agrogray soils was studied in long-term ﬁ eld experiments. It was shown that its features depended on the fertility of soils and the bioclimatic potential of the Cisbaikalian forest-steppe zone. The lower content but relatively high mobility of soil organic matter provided a sufﬁcient amount of substrate for microbial community and enhanced the respiratory activity of microorganisms and mineralization, which resulted in carbon deﬁciency. The better balanced ﬂ ows of net-mineralized and (re)immobilized carbon on the more fertile soil with the larger contents of organic matter formed not only a balanced carbon budget, but also optimal functioning conditions for agroecosystems.