【摘要】 以章古台22年生1 420株·hm-2樟子松林一次性间伐成密度为404株·hm-2和810株·hm-2并采取封育措施的2种林分为调查对象,调查单株生物量、生长量及林下植被。结果表明:404株·hm-2与810株·hm-2相比,11a后樟子松单株生物量干质量前者为后者的1.64倍,根系粗壮程度、草本盖度前者高于后者;14a后胸径生长量前者为后者的1.11倍;有无垂直主根取决于土壤的质地;810株·hm-2林分在林内出现衰弱死亡林木以后才侵入灌木。更多还原

【Abstract】 Taking two kinds of stands(404trees·hm-2and 810trees·hm-2)which were thinned by 22-year-old stand in Zhanggutai Area(1 420trees·hm-2)as survey objects,the volume,growth & understory vegetation of individual plant were investigated.Result shows that 404trees·hm-2 compared to 810trees·hm-2,from the aspect of the dry mass of volume for the individual plant after 11 years,the former is 1.64 times than that of the latter;from the aspect of the degree of sturdy and herbaceous coverage for radication,the former is higher than that of the latter;from the aspect of the DBH growth 14 years later,the former is 1.11 times than that of the latter,with or without the vertical taproot depending on the soil texture;shrub would invade the stands(810trees·hm-2)which appeared death or weak trees.更多还原