針葉樹稚苗の立枯病防除に関する研究(第III報) : 特に木醋液の効果について

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1. This paper deals with the results obtained by the field experiments on the control of damping off of conifer seedlings, by treating soils with pyroligneous acid, sulphuric acid, and organic mercury compound (Uspulun).2. These experiments were carried out at three forest nurseries with different soil quality at different localities.3. The experiments were executed by using Latinspuare method. Each test plot was 5 m^2 at Kasiwabara nursety, Nagano prefecture, and 2 m^2 at Kinuta and Motohatioozi nurseries, both in the Tokyo. prefecture There were 4 replications for each soil treatment.4. The amount of acids supplied to the soil was fixed at the point where the pH value of soil was lowered to 5.0. Acids were applied about 7-10 days before sowing. After the germination, the numbers of diseased seedlings were calculated every 3 days till the middle of June, and every 7 days afterward.5. At every nursery, the pyroligneous acid was most remarkably effective for the control of damping off. The effectiveness was still more encouraged by the additional treatment by spraying uspulun when the damping off broke out seriously. The results are shown in Table 1-4.6. From the results of another experiment on the effect of soil treatments with pyroligneous acid at various concentrations, it was observed that the most excellent effect was observed when the soil was treated with mother liquor (81 per m^2). The results of this experiment is shown by Figure 1. It was noteworthy that at this test plot the mother. liquor was not only harmless to the seedlings, but also suppressed the growth of grasses.
日本森林学会の論文
1954-02-25

針葉樹稚苗の立枯病防除に関する研究(第III報) : 特に木醋液の効果について

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