油松对松毛虫危害的反应

为弄清油松对松毛虫危害有无自控能力，利用植物的生态控制力防治松毛虫，减少浓药的用量，采用蒽酮分光光度法测定不同失叶强度下油松干基糖分含量，结果表明：在人工模拟摘叶和松毛虫自然危害条件下，油松具有补偿和超补偿能力；在２—３年生针叶失叶较多的情况下，油松可将干部贮藏的营养物质供一年生针叶的正常生长。即使在连续三年２—３年生针叶失叶较多的情况下，油松也不致死亡，仍能正常生长。

A STUDY ON RESPONSE OF CHINESE PINE (PINUS TABULAEFORMIS CARR.) ENDAMAGED BY PINE CATERPILLAR

Anthrone colorimetry is applied to detect the suger content from the trunk base of Chinese pine under the various intensity of leaf-fall. The result shows that Chinese pine has the ability of compensation and super compensation to the defoliation of artificial simulantion and natural endangerment resulted from pine caterpillar. With more needle loss of 2-3yrs old leaves, the normal growth of annual needles relies on the stored nutritional from the trunk base of Chinese pine. Even if there are in tensive losses of 2-3yrs old leaves for 3years, the chinese pine doesn't come to die and keeps natural growth.