とうもろこしの生育ならびに体内成分の推移に関する研究 : 第7報燐が雌穂および子実の形成に及ぼす影響

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The influences of phosphorus on ear and kernel formation in corn was examined in sand culture and field trial. In the sand culture Hewitt's nutrient solution excluding phosphorus was used. Phosphorus levels in the solution were maintained at 0.13mM and 2.66mM of NaH_2PO_4・2H_2O. Corn plants were allowed to grow at the low or high phosphorus level through growing season divided into three periods such as vegetative, reproductive and ripening period (table 1). Plants grown at the low phosphorus level for more than two periods produced barren ears. Barren ears produced in the I_1II_1III_2 treatment receiving the low phosphorus for the periods before silking time were due to depressed vegetative growth limiting assimilates for kernel initiation. On these barren ear a reduction in number of kernels occurred. While barren ears in the I_2II_1III_1 treatment receiving the low phosphorus for the periods after young ear formation were due to impeding flow of assimilate to the kernels. On the barren ears an increase in number of undeveloped kernels occurred. Barren ears in I_1II_1III_1 treatment receiving the low phosphorus throughout the growing periods were due to both limiting and impeding assimilate for kernel initiation and development and resulted in a reduction number of kernels and an increase in numder of undeveloped kernels. In the field trial conducted on the volcanic ash soil (Kuriyagawa soil) indicating low phosphorus availability, 1.5kg and 4.5kg per a in P_2O_5 of fertilizer phosphate were basal-dressed in bands. The heavy phosphorus application resulted in increased yields and reduced number of barren ears. The increase of yields was due partially to the reduction in number of barren ear plants and partially to better kernel development.
日本作物学会の論文
1973-03-25

とうもろこしの生育ならびに体内成分の推移に関する研究 : 第7報燐が雌穂および子実の形成に及ぼす影響

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とうもろこしの生育ならびに体内成分の推移に関する研究 : 第7報 燐が雌穂および子実の形成に及ぼす影響

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とうもろこしの生育ならびに体内成分の推移に関する研究 : 第7報燐が雌穂および子実の形成に及ぼす影響