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An Interaction between Magnesium and Calcium in Cabbage-Nutrition

1977; Japanese Society for Horticultural Science; Volume: 46; Issue: 2 Linguagem: Inglês

10.2503/jjshs.46.189

1880-358X

Tetsuo Hara, Tagayasu Tanaka, Yöji Sonoda, Iwao Iwai,

Nitrogen and Sulfur Effects on Brassica

Cabbage plants were water-cultured under a combination of 4 levels of magnesium (0, 5, 25, 125ppm) and calcium (4, 20, 100, 500ppm), and the effect of the elements supplied on the growth and nutrient status of the plants was studied.The dry weight of a whole plant (plant-top+roots) and inner leaves increased with increasing levels of Mg from 0 to 125ppm when the concentration of Ca in the culture solution was high, whereas it decreased at higher levels of Mg when the concentration of Ca was low. The contents of Mg and Ca in the plants increased with increasing levels of each element, and an increase in the content of one element caused a decrease in the content of the other element. The plants high in Mg or Ca were liable to suffer from deficiency injury involving Ca or Mg. The critical contents of Mg and Ca in outer leaves resulting in deficiency injury were about 0.1 and 1.3% on a dry matter basis, respectively.A suitable range of the Ca/Mg content ratio as well as adequate contents of Mg and Ca in each organ is considered to be favorable for the growth of cabbage plants.