Assay of nutrient elements in the tomato plant at different growth stages by atomic absorption spectrometry
1994
Chen Xiyu | Tao Yuliang | Qian Guangxi (Shanghai Agricultural Coll. (China))
Some nutrient elements in tomato plants at different growing stages were assayed by atomic absorption spectrometry. It was found that the levels of 4 microelements, namely Fe, Zn, Cu and Mn were higher in the root than the corresponding levels in the stem and leaf at the seedling, vegetative growth and reproductive stages. The weighted average of Fe concentration at the seedling stage was far above those for the vegetative growth and reproductive stages. At the vegetative growth stage the weighted average levels of Zn and Cu were rather high whereas that of Mn was the lowest. The levels for the macroelements Mg, Ca, K and Na were as follows: At all three stages of growth the Ca level of the leaf was higher than those of the stem and root, whereas the K level in the stem was higher than those of the root and leaf. During growth of the tomato plant, the weighted average level of Ca showed gradual incremental increase whereas that of K exhibited incremental decrease. As to Mg, for the seedling stage the content was highest in the root, for the vegetative growth stage highest in the stem, and for the reproductive stage highest in the leaf. A certain amount of Na was present also in the plant
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