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首页> 外文期刊>Lesnicky casopis >Harmfulness of root rot in the stands planted on formerly arable land and clear-cuts after annosum-infected pine forests in Chernihiv Polissya physiographic region of Ukraine
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Harmfulness of root rot in the stands planted on formerly arable land and clear-cuts after annosum-infected pine forests in Chernihiv Polissya physiographic region of Ukraine

机译：在Chernihiv Polissya GeaTiographic地区的乌克兰Cherniviv Polissya Geabiographic地区的土地上的根腐肉中的根腐肉造成的危害

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The study was conducted in pure Scots pine (Pinus sylvestris L.) forests and mixed forests of Scots pine and silver birch (Betula pendula Roth.) within the Chernihiv Polissya physiographic region of Ukraine. The aim of the study was a comparative analysis of forest mensuration characteristics and health condition of pine and mixed pine-birch stands planted on formerly arable lands and cutover areas after pine stands infected by annosum root rot. It was found that in pine stands planted on formerly arable land, the average diameter of living trees in the root rot disease focus was 1a??6% larger and the average diameter of dead trees was 11a??23% larger than those outside the disease focus. Due to the pathological loss inside the disease foci, the pine stand density was much lower a?? by 14a??38% and the growing stock volume was 16a??35% less as compared to the outside areas. Mixed pine-birch stands (with a predominance of pine trees), established on the cutover areas after pine stands affected by root rot, had a 20% greater stock volume and the birch-pine stands (with birch predominance) in the clear-cuts had 18% greater stock volume than pure pine stands inside the root rot disease area. The pine trees were assessed as a??weakeneda?? in the mixed stands and as a??severely weakeneda?? in the pure pine stand inside the disease focus. The birch trees in mixed stands were characterized as a??healthya??.
机译：该研究是在纯苏格兰歌曲和银桦树（Betula Pendula Roth）的纯苏格兰松树（Pinus Sylvestris L.）森林和混合森林中进行。该研究的目的是对林和混合松树桦树的森林测量特征和健康状况的对比分析，玉米腐土根腐害后以前是耕地和切割区域。结果表明，在杉木站上以前耕地种植，根腐病焦点的生活树的平均直径为1a ?? 6％较大，死树的平均直径为11a ??比外部的23％疾病焦点。由于病灶内的病理丧失，松果密度远低得多？ 14A〜38％，与外部区域相比，38％和生长的库存量为16A？35％。混合的松树桦树架（具有优势松树），在由根腐腐害的杉木站点后建立在切换区，股票量增加了20％，桦木 - 松枝展示（桦木优势）在清澈的剪裁中股票体积大于纯松地区的18％较高，腐烂疾病区域内。杉树被评估为一个？弱点？在混合的展台和一个严重的弱点??在纯松地站在疾病的焦点内。混合架中的桦树的特征是一个?????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????

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