|Title:||氰氮化鈣防治豌豆萎凋病之機制||Other Titles:||Mechanisms of Calcium Cyanamide on Controlling Fusarium Wilt of Garden Peas||Authors:||羅朝村
|Issue Date:||9-Sep-1989||Publisher:||農業試驗所||Journal Volume:||38||Journal Issue:||3||Start page/Pages:||365-373||Source:||中華農業研究||Abstract:||
Fusarium wilt of peas and its causal organism, Fusarium oxysporum f. sp. pisi, could be effectively suppressed by amending the soil with calcium cyanamide (CaCN2) in greenhouse. When the cultivated soil was amended with CaCN2 at 0.5, 1.0, or 5.0% (w/w), its soil pH value and calcium ion were enhanced but the total numbers of the soil microbes, especially the fungi, were decreased. The more CaCN2 added to the soil, the less disease was obtained. However, the experiments showed that the high soil pH value and calcium ion in the soil, adjusted by calcium carbonate, had no significant effect on the disease control. Both CaCN2 and urea inhibited the chlamydospore germination, mycelial growth and sporulation of the pathogea, but CaCN2 by using at the rates of 0.5 and 1.0% (w/w), had two inhibition zones for chiamydospore germination with time while urea had only one. Calcium cyanamide was also more effective on reducing mycelial growth and sporulation of the pathogen than urea did. Therefore, the suppression of pea wilt might be due to fungicidal effect of the intermediate products including hydrogen cyanamide and urea from calcium cyanamide.
|Appears in Collections:||1.台灣農業研究(1950～迄今)|
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