VOLUM OMAGIAL - Facultatea de Ştiinţe ale Naturii şi Ştiinţe Agricole

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Program of prevention and control of fungus… / Ovidius University Annals, Biology-Ecology Series 14: 177-180 (2010) how damaging fungal diseases of plants and causes breaking of preventing deployment of mechanized harvesting in good condition. [3] 5. References [1] POP I., GULEA A., CURTICĂPEAN A., PODAR C. , 2009 - Program complex de prevenire şi combatere a infestării cu miceţi la cereale şi plante furajere pentru asigurarea bunăstǎrii animalelor şi protecţia consumatorilor, Raport de progres Transa a II-a. [2] A. CURTICĂPEAN, FELICIA TOMA, MONICA TARCEA, MANUELA CURTICĂPEAN, VICTOR SĂMĂRGHITAN, I. POP, A. GULEA, 2009 - Optimizarea unei metode HPLC de separare şi determinarea simultană a unor micotoxine din porumb,- Noi tendinţe şi strategii in chimia materialelor avansate. Institutul de Chimie Timişoara, Timişoara. [3] Pop I., Gulea A., Curticăpean A., Podar Cornel, 2009 - ‚Program complex de prevenire şi combatere a infestării cu miceţi la cereale şi plante furajere pentru asigurarea bunăstǎrii animalelor şi protecţia consumatorilor’- Raport de progres Transa I. 180
Ovidius University Annals of Natural Sciences, Biology – Ecology Series Volume 14, 2010 DATA ON THE DYNAMICS OF SOME MICROBIAL GROUPS IN SOILS WITH DIFFERENT TROPHIC STATUS IN CUMPĂNA REGION (DOBROUDJA) Elena DELCĂ Ovidius University of Constanţa, Faculty of Natural Sciences and Agricultural Sciences Mamaia Avenue, No. 124, Constanţa, 900527, Romania, Doctoral school Biology, Specialization Ecology __________________________________________________________________________________________ Abstract: The aim of paper was to assess the effect of administration of organic amendments on the dynamics of the abundance of microbial groups significant in nutrient cycling in soils. Abundance of total culturable bacteria ranged from 19.93x10 6 UFC/g dry soil, to 501.79x10 6 UFC/g dry soil. When soil was supplemented with manure microbial density showed a significant increase 501.79x10 6 UFC/g dry soil compared with control variant. Bacterial density increased significantly as value, too, following the administration of specific biofertilizers (Biovin, Bactofil Professional; Mycos Green), up to 142.13 x106UFC/g dry soil. Inorganic fertilizers did not have a positive effect on microbial density values, being more or less similar to those reported for the control. Our preliminary data show that organic amendments with complex composition have a direct effect on the abundance and diversity of soil and influence indirectly the microbial metabolism and nutrient cycling rate. Keywords: humus, microorganisms, bioactivators, fertility _________________________________________________________________________________________ 1. Introduction To start and propose a suitable biological soil reconstruction plan it was necessary to initiate a series of observations and experiments in a characteristic agroecosystem of Dobroudja (Cumpana commune) in order to assess the current biological status. Using new agricultural technology, and adding different fertilizers the experiments have the aim to improve the number and activity of soil microorganism and indirectly to enhance the rate of organic matter decomposition. This would improve over time the soil structure and restore the stock of humus in the soil. 2. Material and Methods The experiments have taken place on a 7.5 ha plot situated in the outside of Cumpana, in Constanta district. Josef wheat was cultivated on the entire area, which was divided in 7 variants, each variant being administered a different type of fertilizer in different quantities and periods, as follows: - Variant I - only chemical fertilizers - 100kg/ha N15P25K15 in autumn, 150kg/ha NH4NO3 at the beginning of spring; - Variant II – Biovin organic fertilizer 400kg/ha and Biovin 30 of l/ha, ½ at herbicide stage and ½ at flour stage; - Variant III – garden soil - 15t/ha in autumn; - Variant VI – l/ha of Biovin 30, ½ at herbicide stage and ½ at flour stage; - Variant V – Biovin 150kg/ha administered during sowing, 150kg/ha NH4NO3, 40kg/ha at the beginning of spring, 50kg/ha at herbicide stage and 60kg/ha at flour stage; - Variant VI – Biovin 375kg/ha, liquid Biovin 30 of l/ha, ½ at herbicide stage and ½ at flour stage, 1mc Green Mycos, 1l Bactofil Professional; - Variant – March – were not applied amendments. Biovin Fertilizers are being administered for the first time in Dobrogea. Biovin is being produced through a technological process from grape kernels. 12 years of western research proved the following: it aerates the soil, improves it (it contains up to 70% humus makers), and purveys all plants with nutritive elements and biostimulators, it enriches the soil with ISSN-1453-1267 © 2010 Ovidius University Press
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VOLUM OMAGIAL - Facultatea de Ştiinţe ale Naturii şi Ştiinţe Agricole

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