Author(s): VA Apotikar, AV Solanke and GS Laharia

Abstract: The field trial was conducted during both the seasons (2009-10 and 2010-11) on PGI Farm without changing randomization. The experiment was laid out in rabi season. The various components of growth functions viz. absolute growth rate, crop growth rate, relative growth rate, net assimilation rate, leaf area index, leaf area duration were calculated at an interval of 28 days on the basis of dry matter accumulation. The highest LAI and LAD was found near the crop with mulching and five irrigations. The approach has been recognized as a more rational means of growth than the traditional growth analysis techniques. In present studies, this point has been amply illustrated by the differences in the calculated production efficiencies of different treatments. Apart from measured growth indices such as LAI and final yields, a useful index of crop productivity can be obtained by computing the growth functions as shown by this study. Analysis of the data shows that numerically higher mean values of each growth function at the various growth stages for the different treatments shows that 1.2 IW/CPE ratio and early planting with mulching treatment proved to be superior to the other treatments due to its complimentary effect in better use of natural resources like light, soil moisture. LAI and LAD related with amount of dry matter produced by crop, as increasing the number of irrigation and early planting with mulching, as the amount of dry matter produced by crop and converted into LAI and LAD.

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