EFFECT OF SALINIZATION AND DESALINIZATION ON THE UPTAKE, DISTRIBUTION, AND ASSIMILATION OF FERTILIZER NITROGEN BY NODULATED SOYBEANS

概要

論文の詳細を見る
Soybean plants were grown in water culture, to study the effect of salinization and desalinization on the uptake, distribution, and assimilation of fertilizer nitrogen using ^<15>N as a tracer. The following results were obtained: 1) Up to 8 days after NaCl application, ^<15>N uptake by the salt-affected plants was lower than that by the control plants, but higher after NaCl removal. 2) During the time course of ^<15>N absorption, the incorporation of ^<15>N into the leaves was depressed by salinization, even after NaCl removal. On the other hand, the nodulated roots of the salt-affected plants accumulated higher amounts of ^<15>N than the control plants, even after NaCl removal. Pods and stem followed the general trend of the whole plant. 3) The proportion of absorbed ^<15>N in the pods which decreased by salinization, was similar to that of the control plants at the end of the desalinization period. An opposite trend was observed for the nodulated roots. 4) Assimilation of fertilizer ^<15>N into the various nitrogen fractions of pods was depressed by salinization, although the assimilation of absorbed ^<15>N into the cationic fraction, as a percentage of total ^<15>N incorporated into the pods was increased by salinization, i.e. the assimilation of absorbed ^<15>N into the insoluble nitrogen fraction (protein) was depressed by salinity. Based on these findings, it is suggested that, a) the irrigation of soybean plants with fresh water after salty water may alleviate the depressed effect of salinity on nitrogen nutrition and b) salinity may decrease the seed yield due to the inhibition of protein synthesis.
社団法人日本土壌肥料学会の論文

EFFECT OF SALINIZATION AND DESALINIZATION ON THE UPTAKE, DISTRIBUTION, AND ASSIMILATION OF FERTILIZER NITROGEN BY NODULATED SOYBEANS

スポンサーリンク

概要

著者

関連論文

スポンサーリンク