Abstract
An experiment was conducted during 2005–06 and 2006–07 winter seasons to study the effect of drip irrigation regimes and fertility levels on physiological parameters, growth and yield of ashwagandha (Withania somnifera L. Dunal). The treatments consisted of three irrigation regimes, viz., I1: drip irrigation at 100 % pan evaporation (PE), I2: drip irrigation at 80 % PE and I3: drip irrigation at 60 % PE, combined with three fertility levels, i.e., F1: 100 %, F2: 75 % and F3: 50 % of recommended dose of NPK, control having surface irrigation and soil application of fertilizers. The cultivation of ashwagandha with application of drip irrigation at 80 % of pan evaporation along with application of 100 % recommended dose through fertigation resulted in significant improvement in growth, physiological parameters such as crop growth rate, relative growth rate, net assimilation rate, leaf area index, chlorophyll content, and root and seed yields.
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