Cadmium availability index

Cadmium availability index (M H4Cl-exlractable Cd Krishnamurti et al., 1995). 

The kinetics of Cd release, as influenced by the LMMOLs, play an important role in plant Cd uptake. The kinetic rate constant of Cd release, as obtained from desorption kinetics of Cd by LMMOLs and the amount of Cd released by renewal of LMMOLs from the soil, followed the same trend as the cadmium availability index and Cd grain content of durum wheat grown on the soils (Table 5.7). These reports highlight the significance of Cd desorption kinetics in understanding Cd dynamics and phytoavailability. 

CAI = cadmium availability index (in pg kg ) determined by 1 mol NH4C3 extraction method of Krishnamurti et al. (1995b). LSD = least significant difference at p = 0.01 and p = 0.05. Without application of Idaho phosphate fertilizer. With application of Idaho phosphate fertilizer. 

It is known that cadmium ions in toxic concentrations significantly inhibited the growth and development of plants, also they have a negative impact on photosynthesis, respiration, water metabolism and mineral nutrition [19]. In our experiments the treatment of plants by bacilli increased the tolerance index of rye plants. The growth-stimulating effect of the bacteria, probably due to the fact that the bacilli can produce phytohormone-like substances [14, 15], and also increase the content of nutrients in the plant-available form [20] and inhibit the development of pathogenic microorganisms [14]. 

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