The application of biofilm biofertilizer-based organic fertilizer to increase available soil nutrients and spinach yield on dry land (a study case in Lithosol soil type) 

Sudadi, Suryono and E Triharyanto
Published under license by IOP Publishing Ltd
IOP Conference Series: Earth and Environmental Science, Volume 200, conference 1

Abstract
Climate change has an adverse effect on dryland by decreasing soil organic matter content and hence improving soil fertility through innovative research is urgent. The research aims to investigate the optimum doses of organic fertilizer composted with liquid biofilm biofertilizer to increase soil nutrients availability and on dryland Lithosols. The experiment was conducted on Lithosols at Geneng Duwur village, Sragen, Central Java, Indonesia, with the elevation 112 m above sea level. The experimental was arranged in the randomized complete block design with a single factor, namely doses of organic fertilizer which was composted by liquid biofilm biofertilizer (0, 3, 6, 9, 12, 15, 18 and 21 tons ha-1) with three replications. Each treatment occupied a 2 x 3 m2 size plot, then each plot was prepared with holes to plant spinach with plants spacing of 15 cm x 20 cm. Three seeds of spinach were planted at each hole, and they were harvested at the maximum vegetative stage. The observed variables including plants parameters (plant height, stove fresh and dry weight) and soil parameters (organic matter content, pH, cation exchange capacity (CEC), total nitrogen (N), available phosphorus (P) and exchangeable potassium (K)). Data were analyzed using the F test at α=0.05 and followed by Duncan’s multiple range test (DMRT). The results showed the application of organic fertilizer composted with liquid biofilm biofertilizer on dryland of Lithosols increased soil nutrients availability (total-N, available-P, exchangeable-K and soil organic matter) and spinach yields. Composting organic fertilizers with biofilm biofertilizer can support integrated farming systems because it provides microbes as the main agents in biogeochemistry reaction process in soil.

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Impact of depletion or enhance of a capability of resources of air, water, soil, and vegetation