The Effect of Trace Elements on Disease Resistance in Crops (1) The Effect of Manganese on Blast Disease Resistance of Rice.

微量元素對於作物疾病抵抗性之研究　第一報　Mn對於水稻稻熱病抵抗性之影響

徐水泉(S. C. Hsu) ； 簡錦忠(C. C. Chien)

《中華農業研究》 10卷3期 (1961/09) Pp. 32-38

https://doi.org/10.29951/JARC.196109.0005

摘要

本試驗係水耕液中加注不同濃度之Mn，觀察對於稻熱病之發生與稻苗生長之影響而舉辦者。茲將其結果摘要如下：
1．加注Mn區之草高均比標準區（無加注區）爲不良，如加注高濃度(200ppm, 500ppm)時其差異更顯著。葉長如加注Mn 0.5~20ppm者與標準區之差異不顯著，但加注50ppm以上時有顯著之差異。
2．根長及葉寬除高濃度(200ppm, 500ppm)有顯著之差異外，其他處理區均與標準區略爲相同。
3．對稻熱病發生之影響，如Mn濃度低（50ppm以下），則無顯著之影響，但濃度高（200ppm以上）則顯著減少稻熱病之發生，並同時呈現相當之藥害。
4．處理後之稻苗將分析其莖葉內之N, Mn含有量，則Mn之含有量添加區均較無添加區爲高，N之含有量除0.5ppm區外均比無加注區較低。
5．稻苗莖葉的煎汁調製培地，培養稻熱病菌時，加注Mn 0.5, 1及2ppm區之發育較無添加區稍爲優，其他比2ppm較高濃度區在培地上均會抑制稻熱病菌之發育。

並列摘要

If the amount of Mn applied exceeded a certain limit (about 200ppm), the growth of rice seedlings were markedly reduced, and at the same time, the development of blast lesion after inoculation was inhibited. However, a small amount of Mn promoted both. By chemical analysis of the plant, it was found that the N content was reduced with the increase of Mn application.