تأثير إضافة مستويات كبريتات و كلوريد البوتاسيوم إلى التربة المزروعة بالخيار في البوتاسيوم الجاهز في الزراعة المحمية و الري بالتنقيط

الملخص EN

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 .