不同立地条件对飞播成苗的影响

以商洛市飞播林地为对象,通过调查、分析,研究了植被盖度、土壤类型和坡向对飞播造林成苗效果的影响,结果表明,不同植被盖度、土壤类型和坡向分别都会对飞播成苗面积比例和成苗地幼苗密度造成影响,植被盖度0.3～0.7,沙壤土和阴坡地的飞播造林成苗效果最好,它们二者在植被盖度为0.3～0.7时,分别是28.28%和2175株·hm-2,在沙壤土分别是32.6%和2631株·hm-2,阴坡地分别是38.5%和2 424株·hm-2;为取得最好的飞播效果,应选择一定的植被盖度范围、土壤类型和坡向。

Effect of Different Site Conditions on the Seedling Survival in Aerial Seeding Afforestation

With the site of aerial seedling afforestation in Shangluo as the subject, vegetation coverage, soil types and slope aspect were investigated to find their influence on the seedling survival. The result showed that different vegetation coverage, soil types and slope aspects have influence on the seedling area and density. The vegetation coverage between 0.3 to 0.7, with sandy loam soil and shady aspect has the best seedling re- sult. For the vegetation coverage between 0. 3 to 0. 7, there are 28. 25% seedling establishment and 2 175/ hm2 , while with sandy loam, there are 32.6% seedling establishment and 2 631 plants/hm2 , and with shady aspects , there are 38.5% seedling establishment and 2 424 plants/hm2.