ソラマメのしみ症発生に及ぼすカルシウム等の影響

概要

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We conducted water culture experiments to investigate the effects of several nutrients on the brown stain symptom that appears on the seed coat of broad beans. The results obtained were as follows. 1) Almost all seeds of broad bean were deformed, showing brown stain symptoms on full omission of calcium after flowering time. The occurrence percentage of brown stain symptoms in the culture solution from which calcium was omitted for the latter half-period after flowering time till harvesting time was higher than that for the earlier half-period. 2) The occurrence of brown stain symptom was prevented almost completely through the foliar application of calcium after the beginning of flowering under the calcium-omitted solution. 3) Decreasing the Ca: K ratio of the culture solution resulted in an increase in the brown stain symptom of broad bean. 4) The occurrence of brown stain symptom increased as the result of boron deficiency and NH_4-N supply.
社団法人日本土壌肥料学会の論文
1999-06-05