US EPA

2836620 

Journal Article 

Calcium, potassium and nitrate in plant nutrient solutions by measuring of with ion-selective electrodes in hydroponic green house of some vegetables 

Vardar, G; Altıkatoğlu, M; Onat, D; Cemek, M; Işıldak, I 

2014 

Yes 

Biotechnology and Applied Biochemistry
ISSN: 0885-4513
EISSN: 1470-8744 

62 

5 

663-668 

English 

25388287 

10.1002/bab.1317 

WOS:000363407100011 

Life cycle of plants in a healthy way depends on being taken essential plant nutrients in a balanced manner and toxic elements under a certain concentration. Lack of control of nutrient levels in nutrient solution can result in reduced plant growth levels and undesired conditions such as blossom-end rot. In this study, sensitivity and selectivity tests for various PVC based ion-selective membranes were conducted to identify those suitable for measuring typical concentration ranges of macronutrients, i.e., NO(3-) , K(+) and Ca(2+) , in hydroponic solutions. The sensitivity and selectivity of PVC membrane based ion-selective sensors prepared with tetradodecylammoniumnitrate for NO(3-) , valinomycin for K(+) and Ca ionophore IV for Ca(2+) were found satisfactory for measuring NO(3-) , K(+) , and Ca(2+) ions in nutrient solutions over typical ranges of hydroponic concentrations. Potassium, calcium, and nitrate levels that were utilized by cucumber and tomato seedlings in the greenhouse were different. The findings show that tomato plant was consumed less amounts of nitrate than cucumber plant over the first two months period of growing. We also found that the potassium intake was more over other nutritional elements tested for all plants. This article is protected by copyright. All rights reserved. 

plant; nutrient elements; hydrophobic system; chemical; biosensor