Influence of the Salts Common in Alkali Soils 

 upon the Growth of Rice Plant. I. 



Influence of the Single Salts upon 

 the Growth of Rice Seedlings. 



By 

 Koji Miyake. 



Investigations on the influence of the salts common in alkali 

 soils upon the growth of young seedlings, up to the present 

 time, have been made by many authors. In 1887, Hindolf^ 

 observed a good influence of magnesium and calcium chloride 

 upon the early development of many cultivated plants. Coupin 2) 

 studied the toxic influence of many salts upon the growth of 

 the young root of wheat and found that calcium chloride was 

 toxic in concentration of -k^ft- Hebert 3) also investigated 

 the toxicity of chromium, aluminium and magnesium salts 

 upon the growth of germinated seeds of wheat and rape and 

 observed that the toxic action of magnesium salt was least 

 among these salts and often harmless. Since the discovery of 

 large area of alkali soils in western parts of the United States, 

 the toxicity of the various salts common in alkali soils upon 

 the growth of the different plants has also been studied by 

 many american authors. An elaborate investigation on this 

 subject has been made specially by Kearney and Harter 4) . 

 Their results appear in the following table. 



1) Just. bot. Jahresber., Bd. 1, P. 139 (1887). 



2) Cornpt. rend., Tome 132, P. 645 (1901). 



3) Bull. Soc. Chim., France, 4 Ser., 1 (1907) 18, 1026; Dietrich-Jahresber., 

 Agrik.-chem., Bd. 711, P. 252 (1908). 



4) Bull. No. 13, Bureau of Plant Industry, U. S. Dept. of Agriculture (1907). 



