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Ecological analysis of butt-rot disease of Japanese larch

日本落叶松根腐病的生态分析

基本信息

批准号：
63480059
负责人：
KATSUYA Keizo
金额：
$ 2.05万
依托单位：
Institute of Agriculture and Forestry, University of Tsukuba
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (B)
财政年份：
1988
资助国家：
日本
起止时间：
1988 至 1989
项目状态：
已结题

项目摘要

1. Three hundred and eleven larch stakes (3 x 3 x 45cm) were driven to a depth of 30cm below the ground at 5 x 5m intervals in an experimental area (0.9ha) at Kawakami University Forest, University of Tsukuba, and furthermore 3 quadrates 10 x 10m were designated and 102 stakes were driven at 2 x 2m intervals. Six months after the stakes had been placed they were removed, and their surface was examined by eye. Generally, the stakes with the mycelial strands of unidentified basidiomycetous fungus were distributed on a ridge of the area in groups. Occasionally, the fungus was found sporadically.2. All of the live larch trees (901 individuals) in the experimental ares were examined for the rot in their butts by lasing a Shigometer on November and December, 1989.Ninety seven larch trees of the 901 trees tested have been affected with butt-rot disease.The diseased trees were distributed on a ridge of the area in groups, but occasionally, the trees with butt-rot were found sporadically on a r … More idge. Our data suggested that the distribution of unidentified basidiomycetous fungus mentioned above may coincide the distribution of larch trees with butt-rot in the experiment area.3. Soils were collected from 42 spots in the experimental area in order to test soil water content, soil pH, etc. Our data show that high water content of soil (over 80%) and soil acidity (pH 4.6-4.8) may be related with the distribution of butt-rot fungi and lurch trees with butt-rot.4. Isolation of fungi from trunks of about 25 years old Japanese larch trees with butt-rot, planted in central Japan, were performed. Furthermore, fungal isolation was made systematically from trunks of larch treed infected artificially with a buut-rot fungus, Phaeolus scliweinitzii, and healthy larch trees. About twenty non-basidiomycetous fungi were isolated from the sound areas adjacent to wood with visible decay and also from areas with advanced decay of naturally infected larch trees. Coryne dubia and M-1 (un- identified non-basidiomycerous fungus) were mostly isolated iron healthy-slightly discolored areas adjacent to the decay. Coryne dubia and M-1 were also isolated from inoculated parts and healthy-slightly discolored areas of the inoculated larch trees. Inoculated fungus was reisolated from inoculated parts only. The fungus grew very slowly in the trunk of larch trees. Less

1.在筑波大学川上大学森林的实验区（0.9公顷），将311根落叶松木桩（3 x 3 x 45 cm）以5 x 5 m的间隔打入地下30 cm深处，并指定3个10 x 10 m的方形，以2 x 2 m的间隔打入102根木桩。木桩放置六个月后，将它们移走，用眼睛检查它们的表面。一般情况下，桩与菌丝链的身份不明的担子菌真菌分布在该地区的山脊成群。偶尔，真菌被发现零星。1989年11月和12月，用激光光测仪对试验战神901株落叶松进行了树体腐病的检查。在901株落叶松中，有97株发生了根腐病。病树成组分布在试验区的山脊上，偶尔在山脊上零星发现根腐病树。在1989年11月和12月，我们用激光光测仪对901株落叶松进行了根腐病的检查。结果表明，在1989年11月和12月，在1989年12月，我们用激光光测仪对901株落叶松进行了根腐病的检查。结果表明，在901株落叶松中，有97株发生了根腐病 ...更多信息边缘。上述未鉴定的担子菌的分布可能与试验区落叶松枯梢病树的分布相吻合.对试验区42个采样点的土壤进行了含水量、pH等测定，结果表明，土壤含水量高（80%以上）、pH值高（4.6-4.8）可能与乳木果菌和乳木果菌的分布有关。从日本中部种植的约25年生日本落叶松的树干中分离真菌。此外，还对人工感染的落叶松树干和健康落叶松进行了真菌分离。从可见腐烂木材附近的健全区域以及自然感染落叶松的晚期腐烂区域分离出约20种非担子菌真菌。Coryne dubia和M-1（未鉴定的非担子菌性真菌）主要是与腐烂相邻的孤立的铁健康轻微变色区域。从接种部位和健康的轻度变色区域也分离到了Corynedubia和M-1。仅从接种部位重新分离接种真菌。这种真菌在落叶松的树干上生长得很慢。少