EFFECT OF APPLICATION LEVELS OF K-SULPHATE, K-CHLORIDE ON K CAPACITY AND RELEASE UNDER CONTROLLED ENVIRONMENT AND DRIP IRRIGATION .

Y.M.Abu-Dahi,; B.M.AL-Batawi,

	EFFECT OF APPLICATION LEVELS OF K-SULPHATE, K-CHLORIDE ON K CAPACITY AND RELEASE UNDER CONTROLLED ENVIRONMENT AND DRIP IRRIGATION .
The Iraqi Journal of Agricultural Science
Article 1, Volume 39, Issue 6, 2008, Pages 34-48
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 . A Lab. Experiment were conducted to estimate the rate and capacity of potassium release . After crop planting the level of 1000 Kg K.ha-1 gave 99.60 and 490.60 mg.Kg-1 soil for potassium capacity from potassium sulphate fertilizer for exchangeable and non exchangeable potassium respectively , while the same level gave 80.70 and 481.10 mg.Kg-1 soil for potassium capacity for exchangeable and non exchangeable potassium respectively in the of potassium chloride. Results also showed rate of potassium release before planting was (45.95 and 30.20) mg.Kg-1 soil for the two depths (0-30) cm and (30-60)cm for the exchangeable pool, while it was (23.34 and 11.30) mg.Kg-1 for the two mentioned depths for the non exchangeable pool respectively. After crop planting the 1000 Kg K.ha-1 level gave (80.70 and 69.99) mg.Kg-1min-1 and (70.20 and 60.90) mg.Kg-1.min-1 for potassium sulphate and potassium chloride for exchangeable and non exchangeable pools respectively.

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