ROLE OF ION PAIRS AND ACTIVITY IN ESTIMATION OF IONIC STRENGTH FROM ELECTRICAL CONDUCTIVITY OF IRRIGATION WATER

IF 1.1 Q3 AGRICULTURE, MULTIDISCIPLINARY IRAQI JOURNAL OF AGRICULTURAL SCIENCES Pub Date : 2023-06-25 DOI:10.36103/ijas.v54i3.1758

K. S. Rajab, A. O. E. Lecturer, P. Dept., Soil Water, Coll, Agric, Engin, Sci., Salaheddin

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Abstract

This study was carried out in Erbil governorate, Iraq during 2020 to estimate the regression relations between the ionic strength of 354 water samples and their electrical conductivity then influence of correcting ion pairs and activity on this relation. Results indicated that electrical conductivity regards as an accurate measure of ionic strength for irrigation water. Correcting ion pairs plus activity had a great effect on the regression values between ionic strength values and electrical conductivity of the studied water samples. Highly significant correlation coefficient was recorded between ionic strength and electrical conductivity before correction and after correcting ion pairs and ion pairs plus activity with the correlation coefficient values of (r= 0.99**, 0.93** and 0.97**) respectively. Correcting ion pairs and ion pairs plus activity caused a decrease in the slope of the regression from 0.0157 to 0.0104 and 0.0047 respectively. Neglecting intercept values from the regression line caused an increase in the slope of regression relation to 0.0112 and 0.0058 for correcting ion pairs and ion pairs plus activity respectively.

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离子对和活度在灌溉水电导率估计离子强度中的作用

本研究于2020年在伊拉克埃尔比勒省进行，以估计354个水样的离子强度与其电导率之间的回归关系，以及校正离子对和活度对这种关系的影响。结果表明，电导率可作为灌溉水离子强度的准确测量指标。校正离子对加上活度对离子强度值与电导率之间的回归值有很大影响。校正前离子强度与电导率、校正后离子对与离子对加活度的相关系数分别为(r= 0.99**、0.93**、0.97**)，呈极显著相关。修正离子对和离子对+活性分别使回归斜率从0.0157减小到0.0104和0.0047。忽略回归线截距值，校正离子对和离子对+活度的回归关系斜率分别增加到0.0112和0.0058。

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来源期刊

IRAQI JOURNAL OF AGRICULTURAL SCIENCES AGRICULTURE, MULTIDISCIPLINARY-

CiteScore

2.30

自引率

50.00%

发文量

140

审稿时长

6 weeks

期刊介绍： IRAQI JOURNAL OF AGRICULTURAL SCIENCES (IJAS)is the first agric. scientific and refereed journal established in Iraq. The first volume was published in 1966. IJAS is registered in the number 137 in 1988 of the Baghdad National Library. Years ago, it was published with one issue a year. For the time being, it is published bimonthly (6 issues for a volume). IJAS Deal with: Field Crops. Plant Breeding. Agricultural Economics. Agricultural Extension. Agricultural Mechanization. Basic sciences. Hort. Sciences. Animal Husbandry. Food Technology, Plant Pathology. Plant Entomology. Poultry Sciences. Soil Sciences. Water Resources. Veterinary. Biology.