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EFFECT OF APPLICATION LEVELS OF K-SULPHATE AND K-CHLORIDE ON AVAILABILE POTASSIUM UNDER CONTROLLED ENVIRONMENT AND DRIP IRRIGATION | ||
| The Iraqi Journal of Agricultural Science | ||
| Article 1, Volume 40, Issue 2, 2009, Pages 148-160 | ||
| Authors | ||
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| Abstract | ||
| A field experiment was conducted in a heated plastic house belong to AL-Moktadiya company for agricultural staffs situated lies about 24 km south of Baghdad in a soil has a silty clay loam texture to study the effect of potassium sulphate and potassium chloride and their levels applied to soil planted with cucumber at a fall season of 2004 on potassium capacity and coefficient potassium release . The treatments included two potassium fertilizer sources : potassium sulphate and potassium chloride applied to soil in sex rates . Treatments were distributed according to (RCBD) with three replicates . Results showed that potassium sulphate fertilizer had significant data of both soluble and absorbed potassium compared with potassium chloride fertilizer . Values of soluble potassium were (10.95, 10.55 and 7.31) × 10-2 /cmol K. kg-1 soil for potassium sulphate , potassium chloride and control treatment respectively , while they were (89.39, 88.00 and 76.37) cmol K. kg-1 soil for potassium sulphate , potassium chloride and control treatment for adsorbed respectively. Results also showed , that the combination treatment of (1000 kg K . ha-1 applied to soil at 30 days after planting for both fertilizer sources had significant data and gave the highest values for soluble and adsorbed potassium which were (16.92 , 16.71 and 11.32) 10-2 /cmol K. kg-1 soil for potassium sulphate , potassium chloride and control treatment for soluble potassium respectively , while they it were (124.69 , 120.32 and 89.68) 10-2 /cmol K. kg-1 soil for potassium sulphate , potassium chloride and control treatment for adsorbed potassium respectively . | ||
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