Production of sugarcane (Saccharum officinarum L.) can be improved through manipulating sugarcane trash management. Sugarcane litter as the main residual product of sugarcane plantation can be used as a source of nutrients to improve soil chemical and biological properties. Cellulolytic microbes are able to degrade sugarcane litter which need to be optimized under the combination of various organic or an organic inputs of soil amendment. However, various soil and environment condition are influenced cellulolytic microbe such as pH, nutrients, water availability, and availability of organic substrate along with their interaction with other microbes. Urea, Dolomite (CaMg(CO3)2) and manure is intended to optimize cellulolytic microbial growth. The research was conducted at Sugarcane Research Centre PTPN X, Djengkol, Kediri from January to December 2019. Materials on experiment used are cellulolytic bacterial isolates, Trichoderma sp., urea, dolomite, cow manure, molasses and sugarcane litter. The research method used combination of Randomized Complete Block Design (RCBD). The treatments were S1 (Molasses + sugarcane litter) ; S1S (Molasses + sugarane litter + Cellulolytic bacteria) ; S1SU (Molasses + sugarcane litter + Cellulolytic bacteria + Urea) ; S1SUD (Molasses + sugarcane litter + Cellulolytic bacteria + Urea + Dolomite) ; S1SUP (Molasses + sugarcane litter + Cellulolytic bacteria + Urea + Cow manure), S1T (Molasses + sugarcane litter + Trichoderma sp., S1TU: Molasses + sugarcane litter + Trichoderma sp. + Urea), S1TUD (Molasses + sugarcane litter + Trichoderma sp. + Urea + Dolomite), S1TUP (Molasses + sugarcane litter + Trichoderma sp. + Urea + Cow Manure). The results showed that the greatest cellulolytic microbe were detected under S1SUD treatments, litter provide the best condition for soil microbe to grow, giving the total population of soil bacteria and cellulolytic bekteri population to reach 6.09 × 106 cfu g-1 and 3.45 × 106 cfu g-1 at 4 WAP (week after planting). However, under the addition of sugarcane litter, urea and cow manure (S1SUP) provided the best sugarcane growth and cane yield at about (90.32 ton ha-1), as cow manure is more able to provide and fulfilled nutrients requirement for sugarcane, followed by (S1TUD) whereas cow manure did not exist, yielded at 84.48 ton ha-1.
Keywords: soil microbe, nutrients balance, litter, manure, land management