作物の窒素栄養に関する研究(水稲編)(第2報) : 水稲体内の含窒素成分の分布と変異

概要

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Fractional determination of nitrogenous substance in aforementioned sample, was made in order to explain the process of nitrogen assimilation. Total nitrogen contents rises to maximum, immediately after transplanting and decreases gradually with the growth of rice plant. Protein-nitrogen also shows a same tendency. Increase and decrease curves in the contents of soluble nonprotein-nitrogen is a bimodal curve, which has two maximum namely before primordium and after heading. Amide-nitrogen has a same tendency. Ammonia-nitrogen increases previously to the soluble state and hendecreases. Nitrate-nitrogen was found tracely. Two maximum content of nonprotein-nitrogen are translocation form of protein, namely enrichment before primordium and movent to the ear after heading. Top dressing of nitrogen, makes temporaly rise of protein-nitrogen but at the harvest as a result of increase of dry-matter, total nitrogen content of crop drops. Rate of combination of nitrogen dressed at the primordial stage, to the product of photosynthesis is most rapid than before and after primordium.
一般社団法人日本土壌肥料学会の論文
1951-11-15