Residual Effect of Gypsum on Growth, Yield and Nutrient Uptake by Onion (Allium cepa L.) under Groundnut-Onion Cropping Sequence

摘要

The field experiment was conducted during the rabi season of 2010. The experiment was laid out in randomized block design with three replications. The experiment comprised five treatment combinations. The treatment details are T()-Control (no input),T-NPK (25 :50:20 kg ha~(-1)) + Gypsum @ 100 kg ha~(-1), T2-NPK (25:50:20 kg ha~(-1)) + Gypsum @ 200 kg ha~(-1), T-NPK (25:50:20 kg ha~(-1)) +Gypsum @ 300 kg ha~(-1), T4-NPK (25:50:20 kg ha"') + Gypsum @ 400 kg ha~(-1). The soil of experimental field wassilt loam in texture having pH 7.5, EC 0.28 dSirr1 and organic carbon 0.52%. The results revealed the significant effect of treatment on plant height over control at 90 DAS. The maximum values were recorded with the application of treatment T4-NPK (25 :50:20 kg ha~(-1)) + Gypsum @ 400 kg ha-1. Similarly, result was also found in respect of nutrient uptake by crop in this same treatment.