Studies on Standardisation of Spacing and Trans-planting Depth for a Self Propelled Rice Transplanter

摘要

A field experiment was conducted during March-June 2008 at wetland in Tamil Nadu Agricultural University to optimize the spacing and depth of transplanting in rice cultivation using a self propelled rice transplanter (Yanmar 6 row). The treatment consisted of 4 levels of hill spacing (30 × 32 cm, 30 × 22 cm, 30 × 18 cm and 30 × 16 cm) in the main plot and depth of planting (manual, 2 cm and 4 cm depth) in the sub plot. Higher DMP (24,231 kg ha~(-1)), root length (16.63 cm), number of panicles m~(-1)2 (862 m~2) and grain yield (7,167 kg ha~(-1)) were produced when transplanting was done at 30 × 22 cm spacing (15 hills m~2). Among the depth of planting, increased plant dry matter production (17,498 kg ha~(-1)), root length (17.28 cm), number of panicles m~(-2) (812 Nos. m~(-2)), filled grains paniclel (113), panicle length (22 cm) and grain yield (7,667 kg ha~(-1)) were produced in 4 cm depth.