Summary
Four varieties of each paddy and wheat crops were grown in pots to see their cation exchange capacities of roots and their relationships with the uptake of nutrients by shoot and grain at different physiological growth stages. The results are summarised, as follows:
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(i)
The cation exchange capacity of roots was maximum at tillering stage which continued to decrease with an increase in the age of plants. At early stages of plant growth, significant differences in the root CEC of different varieties of paddy and wheat were recorded but the differences became almost narrow in later stages of plant life and ultimately the CEC of roots became almost similar, in all the varieties as the crops reached to maturity. Higher root CEC of paddy varieties were observed than wheat varieties throughout their physiological growth.
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(ii)
Uptake of phosphorus, potassium, iron and manganese by shoot and grain was found significantly and positively correlated with the CEC of roots in most of the varieties of both, paddy and wheat crops throughout their plant life.
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Ram, L.C. Cation exchange capacity of plant roots in relation to nutrients uptake by shoot and grain as influenced by age. Plant Soil 55, 215–224 (1980). https://doi.org/10.1007/BF02181801
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DOI: https://doi.org/10.1007/BF02181801