水稻幼苗對於氨態氮與硝酸態氮之利用及氨基酸的合成

The utilization of ammonium salts and nitrate salts and the synthesis of amino acids in the rice seedling

The most important inorganic salts of nitrogen which can be absorbed and utilized by plants are ammonia and nitrates. These two play a role in various degrees of efficiency in the growth of plants. Thers are many kinds of plants which prefer ammonia salts to nitrates as their nitrogenous nutrients. Rice plant is one of them, and may be accordingly classified as an ''ammophile plant''. On the other hand, some plants will grow more vigorously in a nitrate medium; and they are grouped as the ''nitrophiles'' such as jute, buck. wheat and potato etc. The question of the relative efficiency of ammonium and nitrate as sources of nitrogen for green plants is one which has often been investigated since the days of Hutchinson, Miller (1911, cited in Clark and Shive 1934), and Prianischnikov (1926).