ダイズとイネにおけるカリウム, カルシウム, マグネシウムの吸収・移行に及ぼす塩化ナトリウム添加効果の比較 : 無機要素の吸収・移行に及ぼす高濃度塩化ナトリウム添加の影響(第4報)

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The responses of the absorption and the translocation of K, Ca and Mg ions has been compared in two kinds of crops, rice and soy bean, which were cultivated in nutrient solution containing 7 concentrations of NaCl (0-150 mmol L^<-1> NaCl). The results obtained are as follows : 1. Absorption : In soy beans K^+ absorbed (meq/plant) and K^+ absorbing rate (meq/100 g) increased with increasing NaCl content in medium up to 75 mmol^<-1> NaCl, and the absorbing rates of Ca^<2+> increased with increasing NaCl content in the medium. In rice plants, K^+, Ca^<2+> and Mg^<2+> were absorbed and their absorbing rates decreased with increasing NaCl content in the medium. These results suggested that the main passage of Na^+ or Cl^- across the plasma membrane of root to xylem differed from each other (example ; apoplastic transport in the rice roots and ion channel transport in the soy bean roots). 2. Translocation : Both crops showed almost the same response over the concentrations of NaCl used on transporting of K^+, Ca^<2+> and )Mg^<2+>. Upper transports of K^+ in the root and the stem of both plants and Mg^<2+> in the stem of soy bean and Ca^<2+> in the root of rice were promoted with increasing NaCl concentrations in medium. 3. The balances of cation to anion in every part were maintained completely in all treatments in both crops.
社団法人日本土壌肥料学会の論文
1995-02-05