تأثير القوة الأيونية و مستويات البوتاسيوم المضاف في تثبيت البوتاسيوم في بعض الترب الكلسية

Abstract EN

The purpose of this investigation is to study K-fixation in some calcareous soils of Basrah province (Hartha, Tanoma, Fayha and Abul-Khasseb) at three level of ionic strength, (distilled water, 0.01 and 0.10) and five level of potassium (0, 150, 300, 600 and 1200) mg / kg soil.

The results showed that the quantity of fixed potassium in the selected soils range from (23.55 to 361.20)mg / kg soil with the mean value of 108.97mg / kg , with percent of (8.7 to 45.5 %) of added potassium.

Soil fixing ability was decreased with increasing ionic strength distilled water > 0.01> 0.10 M.

The results also showed that K-fixation negatively correlated with increasing particles size of soil.

The amount of fixed potassium was increased with farther addition of potassium to the soil samples.