Keragaman dan Kelimpahan Mikroorganisme pada tanah sawah dengan Sistem Pemupukan yang Berbeda

One indicator that can be used as a parameter of soil fertility by knowing the abundance of microorganisms. Soil microorganisms play a role in soil properties both physical, chemical and biological. The level of intensive land management with high inputs in conventional farming systems especially paddy fields using chemical fertilizers, superior seeds and chemical pesticides can significantly affect the population and composition of soil microorganisms. This study aims to analyze the abundance of microorganisms using different fertilization techniques, namely the use of rice straw residues and inorganic fertilizers. Both of these techniques are thought to affect the abundance of soil microorganisms. The research was carried out in Salasaee village, Bulukumba district, South Sulawesi and at the Soil Biotechnology Laboratory and Soil Chemistry Laboratory, University of Hasanuddin. The research method was carried out through collection of soil samples, morphological identification and the characteristics of physiology and biochemistry, data analysis was carried out in a descriptive exploratory manner. Based on the results of the highest abundance of microorganisms found in the third location (LK3) with an organic fertilization system that is 742 x 10-6 Cfu / gram, and the lowest abundance is in the first location that is 178 x 106 while in the second location with a semiorganic system that is 381 x 10- 6 cfu / gram. the abundance of microorganisms from organic fertilization systems leads to higher yields than inorganic or semiorganic fertilization systems. Different fertilization techniques affect the abundance of soil microorganisms, it can be seen from the diversity of microorganisms in the research location where the organic fertilization system can maintain the abundance of microorganisms compared with inorganic fertilizatio