Performance of SRI Rice Growth on Soil Accustomed to Conventional Cultivation Methods
Keywords:System of Rice Intensification (SRI), conventional cultivation method, organic fertilizer
The aim of this research are to compare actual evapotranspiration among SRI Paddy Cultivation with different treatment of fertilizer and soil amendment, and to examine SRI growth with fertilizer and soil amandement treatment in soil accustomed to conventional cultivation method. This research was conducted at the screen house of Agricultural Technology Laboratory of Universitas Jenderal Soedirman, Purwokerto, during December 2016 until April 2017. The data were collected from 4 experiment pots with different treatments. Soil were taken from the paddy field that usually practice conventional method (flooded irrigation, chemical fertilizer). First pot were added with organic fertilizer with dose of 100 ton/ha (SO). Second pot were added with organic fertilizer with dose of 100 ton/ha and biochar application as much as 50 kg/ha (SOA). Third pot were added organic fertilizer in amount of 100 ton/ha and chemical fertilizer during vegetative phase (SOK). The fourth pot were purely soil with chemical fertilizer (SK). Result showed actual evapotranspiration per season were higher in SOK and SK, rather than in SO and SOA. Phase per phase of crop shown sharp difference of crop coefficient (Kc) among the four treatments. The Kc were SO (0.47 - 0.57), SOA (0.44 - 0.52), and SOK (0.64-0.96), and SK (0.54 - 1.09). SOK and SK shows higher evapotranspiration and better growth compared to SO and SOA. SO and SOA simply recognized as 'fully organic' The converting cultivation method from fully chemical fertilizer to fully organic fertilizer was the main hypothesis of this result.