Influence of the Salts Connmon 

 in Alkali Soils upon the Growth 

 of Rice Plant. V. 

 Can Barium and Strontium replace 

 the Antagonistic Action of Calcium ? 



By 



Koji Miyake. 



In the previous papers, it was pointed out that the injurious 

 action of the metallic ions upon the growth of rice seedlings is 

 perfectly neutralized by the presence of calcium ion. It will be 

 very interesting then to experiment with barium and strontium, 

 which are similar to calcium in chemical properties, with a view 

 of finding favorable action similar to that of calcium upon the 

 neutralization of toxicity of other metallic ions. In order to 

 determine this problem we have taken sodium and magnesium 

 chloride as the toxic salts, and the following experiments were 



I. Experiment with MgCL. 



20 beakers of about 5.5 cm diameter and 7cm deep, served 

 for the experiment. While 1 beaker which contains 30 cc of 

 distilled water, served as check, the other 19 beakers received 

 1/10 N. MgCla 30 cc, 1/10 N- MgCL 25 cc + l/lO N. CaClo 5 cc, 

 i/10 N. MgCl^ 20 cc+1/10 N. CaCl. 10 cc, 1/10 N. MgCk 15 

 cc + 1/10 N. CaCL 15 cc, 1/10 N. MgCL 10 cc+1/10 N. CaCh 

 20 cc, 1/10 N. MgCl2 5 cc + 1/10 N. CaCla 25 cc, 1/10 N. CaCl^ 

 30 cc, 1/10 N. MgCl. 25 cc + 1/10 N. BaCl, 5 cc, 1/10 N.MgCl^ 

 20 cc+1/10 N. BaCla 10 cc, 1/10 N. MgCl2 15 cc + 1/10 N. BaCI^ 

 15 cc, 1/10 N. MgCl^ 10 cc+1/10 N. BaCl^ 20 cc, 1/10 N. 



