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1.3. The DBH of Chinese pine in Chinese pine-Silver chain Mixed Forest are higher than the DBH of Chinese pine in Chinese Pine Pure Forest by a 16.98% rate, Diameter-Height increased by a 9.98% rate,single tree volume increased by a 36.92% rate,needle quantity increased by a 82.67% rate,furthermore capability of bearing the weight of Pine lappet enhanced by a 82.67% rate。
3.油松刺槐混交林中的油松与纯林中的油松相比,胸径高出16.98%,树高增加9.98%,单株材积增加36.92%,针叶量增加82.67%,对赤松毛虫的承载量提高82.67%。收藏指正
2.The mortalities of pine lappet caterpillar, Dendrolimus spectabilis Butler from V Bt Ⅱ compound agent,375g/hm 2,750g/hm 2,1125g/hm 2,and 1500g/hm 2,are 96.77%, 96.69%, 99.31% and 100% respectively in seven days.
用V－Bt－Ⅱ型生物复合病毒杀虫剂进行赤松毛虫Dendrolimusspectabilis防治试验，菌剂用量375g／hm2、750g／hm2、1125g／hm2、1500g／hm2，七天后赤松毛虫死亡率分别为96．77％、96．69％、99．31％、100％。收藏指正
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