Abstract
Amino acids of rice were assayed to examine the effect of fertilizer varying on the amount of the three major nutrient elements, nitrogen, phosphorus and potassium. Lowland ricevar. Norin No.25 was subjected to the examination at an experimental field, separated ineach group, control, those devoid of each element and those altering in the amount of it. The rice samples at the different stages of ripening, late milky and perfect, were assayedfor the amino acids in their complete hydrolysates. The microbiological assay technique wasused throughout the study.
In the amino acid contents of rice, no remarkable change so significantly indicated theeffect of the application of the elements was observed, while conspicuous variations of valuesof several amino acids between both of the ripening stages were revealed. The samples ofthe perfect ripening stage showed higher alanine, aspartic acid and argirtine values whilethey showed lower valine, serine and threonine values than those at the late milky stage.
