New Researches in Biotechnology - Facultatea de Biotehnologii ...

Proceeding of the 4 rd International Symposium“NEW RESEARCH IN BIOTECHNOLOGY” USAMV Bucharest, Romania, 2011ТECHNOLOGICAL EVALUATION OF THE USED SIDERATES WITHAN ALTERNATIVE BIOTECHNOLOGICAL METHOD OF RE-CULTIVATIONIVAN DIMITROV, TOTKA MITOVA, SVILEN RAYKOV, IVAN PACHEVUniversity of Shumen “K. Preslavski”, e-mail: rajkov_svilen@abv.bgAbstract. The alternative biotechnological method is based on the usage of green fertilization as asource for accumulation of organic mass, needed for the process of humification. With it, however,the construction of correct crop rotations is accompanied by many problems. The main requirementis that more modest cultures are grown, developing in poor and unstructured soils with a poor waterand air regime (2, 3, 4, 5.) The number of treatments is reduced to the possible limit so that theprocesses of densification and denitrification are limited. This, on its part, strongly narrows thespecies composition of the cultures (1, 4.)The purpose of this research is to reach a quick accumulation of organic matter in the newly-formedsubstrates and appropriate soil conditions for the growing of siderate cultures in a compactedsuccession of crops.Keywords: re-cultivation, siderates, biomass, organic matter1. INTRODUCTIONThe alternative biotechnological method is based on the usage of greenfertilization as a source for accumulation of organic mass, needed for the process ofhumification. With it, however, the construction of correct crop rotations is accompanied bymany problems. The main requirement is that more modest cultures are grown, developingin poor and unstructured soils with a poor water and air regime (2, 3, 4, 5.) The number oftreatments is reduced to the possible limit so that the processes of densification anddenitrification are limited. This, on its part, strongly narrows the species composition of thecultures (1, 4.)2. МATERIAL AND METHODSIn a field experiment on an area of 1 ha in a heap Mednikarovo in the area ofmines Maritsa-East, four soil substrates were tested by application of non-humus recultivationtechnology:1. Sediments of yellow-green and grey-green clays;2. Sediments + 700 m 3 /ha soil from humus horizon on leached vertisol;3. Sediments + 700 m 3 /ha soil from humus horizon + 500 m 3 /ha ash;4. Sediments + 500 m 3 /ha ash.In a compacted three-field succession of crops: I year – winter forage pea + Sudangrass; II year – winter pea + barley (mix) + Sudan grass; III year – wheat, the followingtreatments were applied (Table 1):33