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                                                                                                                                                        重慶防腐木凍害類型及救護處理的措施

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                                                                                                                                                        重慶防腐木凍害類型及救護處理的措施

                                                                                                                                                        發布日期:2017-01-18 作者: 點擊:

                                                                                                                                                           1.斷梢.這一類型受害比較普遍,受害程度也比較嚴重.主要重慶防腐木是由于防腐木樹冠截獲的雪的重量超過了樹梢.樹干本身的負荷極限所致.這類受害林木在雪融化后無法恢復生長,需要進行伐除清理,及時利用.

                                                                                                                                                          2.翻莞.這一類型也是主要的受害類型,受害率也比較高.主要發生于陡坡及土層較淺薄立地.防腐木因雪壓而形成頭重腳輕被連根拔起,根系完全離地或根系嚴重扯斷.這類受害樹木已經沒有存活和恢復的希望,雪災后應予以及時伐除利用.

                                                                                                                                                        重慶防腐木

                                                                                                                                                          3彎斜.主要是由于防腐木枝葉上所存留的雪的重量尚未超越樹干的負荷極限,借助本身具有的彈性,向側面偏斜,或梢冠向下彎曲呈弓形.這類受害林木在雪融化后大都仍可恢復原狀,對生長發育影響較小,需要保留.雪壓期間應及時Z大限度地清除樹冠上的積雪.

                                                                                                                                                          4..倒地.這是防腐木Z主要受害類型之一,受害率比較高.與彎斜類重慶防腐木型類似,倒地類型也是由于樹木枝葉上所存留的雪的重量比較大,形成了頭重腳輕而彎斜,在雪的持續壓力下,漸漸被壓倒伏在坡面上.這一類型如果樹根未離地,或根系受損較輕,雪融后能逐漸恢復生長,應該給予保留.雪壓期間應及時Z大限度地清除樹冠上的積雪.如果根系受到嚴重損傷或被扯斷,恢復比較困的,應伐除清理,及時利用,以重慶防腐木減少損失.

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