Alleviation of adverse effect of first irrigation to wheat crop in saline sodic soil
2012
Hussain, S.S. (Soil Salinity Research Inst., Pindi Bhattian (Pakistan)) | Jamil, M. (Soil Salinity Research Inst., Pindi Bhattian (Pakistan)) | Sadiq, M. (Soil Salinity Research Inst., Pindi Bhattian (Pakistan)) | Mehdi, S.M.
It is an established fact that temporary waterlogging occurs at first irrigation to wheat crop in rice-wheat cropping system. This is also true in saline sodic soils. Wheat crop becomes pale yellow just after first irrigation resulting in severe reduction in growth and yield. This study was planned to address this problem by various management strategies like irrigation at 25 days after sowing (DAS) without fertilizer, irrigation at 25 DAS + 120-110-70 NPK kg per ha, irrigation at 25 DAS + 120-110-70 NPK kg per ha + 25 kg sulphuric acid per hectare, irrigation at 25 DAS + 120-110-70 NPK kg per ha + 12 kg sulphuric acid per hectare and irrigation at 40 DAS +120-110-70 NPK kg per ha. A saline sodic field {pHs =8.92, ECe =5.70 (dS m-1) and SAR=23.71 (mmol L-1)1/2} was selected. Maximum grain yield (3.01 t per ha), number of tillers (437 m-2), 1000-grain weight (35.43 g) and number of grains per spike (40) were produced with the application of 120-110-70 NPK kg per ha + 25 kg per ha sulphuric acid at first irrigation applied 25 days after sowing in saline sodic soil.
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