Calcium-boron interaction in radish plants grown in sand culture
2007
Tariq, M. (NWFP Agricultural Univ., Peshawar (Pakistan). Dept. of Soil and Environmental Sciences) | Mott, C.J.B. (University of Reading, England (UK). Dept. of Soil Science)
A sand culture experiment was carried out to study the Ca-B interaction growing radish (cv. French breakfast) as a test crop under green house conditions. Calcium was applied at the rate of 80, 200, and 500 mg Ca L-1 as CaCl2. 2H2O and boron was applied at the rate of 0.05, 0.25, 1.0 and 5.0 mg B L-1 as H3BO3 in different combinations along with a basal dose of modified complete nutrient solution based on the Long Ashton Formula. The experiment was laid out in a randomized complete block design with factorial arrangement and replicated three times. Results revealed that maximum fresh and dry matter yields were recorded at 500 mg Ca and 1 mg B L-1, corresponding to Ca/B ratio of 500:1 in the nutrient solution. The concentration of Ca and B in radish plants increased with increasing the respective levels of these elements in the nutrient solution, but the total uptake of these two elements showed a close similarity to growth response of radish p lants, indicated total uptake was a useful but alternative way in determining the effect of Ca-B on the response of plant's content of these two elements. Moreover, with decreasing the Ca/B ratio in nutrient solution the ratio in tops and roots linearly decreases and showed significantly positive correlations, while, an optimum Ca/B ratio in plant tops and roots were found to be 241 and 188, respectively. The values for both plant parts found to be normal in predicting the maximum yield of radish plants.
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