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对受1991年7一8月两次强台风袭击表观上无严重受害症状(一级风害)而照常采胶的70株第5一6割龄的PR107胶树进行了生理状况研究。结果表明,风力胁迫后,无论表现排胶相对正常与否的胶树,其产量和排胶状态、胶乳性状,乳管代谢强度和抗氧化等生理状况均比受害前年度同期的水平差。本例风害树的排胶线不连续并变窄,冬休和停割效果不明显;其严重度与排胶初速度、乳管堵塞指数、胶乳干胶含量、硫醇和无机磷含量显著相关,这与典型死皮树的生理状况相似。风害次年树干出现裂口证明风力胁迫使一部分产胶机构受到不可逆的损害。因此,当胶树受台风较轻危害时,必须采取保护措施。
70 strains of PR107 gum trees, aged 5 to 6 years old, which were rubberized as expected by the two strong typhoons in July-August 1991 without obvious symptoms of serious damage (first class wind damage), were studied. The results showed that after the wind stress, regardless of whether the gum was relatively normal or not, the yield and plasticizing state, the latex traits, the metabolism of the milk tube and the physiological status of antioxidation were all worse than those of the same period of the previous year. In this case, the drainage lines of windbreak tree were discontinuous and narrowed, and the effects of winter break and cut-off were not obvious. The severity was significantly related to the initial discharge speed, the tube plugging index, latex adhesive content, thiols and inorganic phosphorus content , Which is similar to the physiological condition of a typical dead skin tree. The following year winds broke the tree trunk to prove that wind stress caused some irreparable damage to glue-producing units. Therefore, when the rubber tree is less harmful to the typhoon, must take protective measures.