摘要
对渭北刺槐人工林无性更新萌芽与根蘖发生规律调查研究表明：萌芽数量及幼树生长量随伐桩直径增加而增大；伐桩上萌条分布在０～８ｃｍ范围内，集中分布在距地面０～２ｃｍ内，靠坡下方多于坡上方，每伐桩平均萌条７．７株；萌条有效株生长量，在距地面２．１～４．０ｃｍ范围内，以４～６株丛生的生长快；根蘖幼树主要发生在０～７ｃｍ深土层中直径０．７１～１．４ｃｍ粗的水平母根上，伐桩四周０．５１～１．５０ｍ范围内是根蘖幼树集中分布区．靠坡下方多于坡上方；萌芽幼树比根蘖幼树生长快、整齐，但更新频度只有根蘖幼树的２／５．刺槐人工林无性更新、改造应二者相结合，以萌芽更新为主、根蘖更新为辅。
The clonal regeneration of black locust(Robinia pseadoacacia)sprouts and root suckers in Weibei loess plateau,Shaanxi province was investigated.Result demonstrates that the growth and the number of sporut plants are increasing with increasing of stump diameter.The heiqht of sprouts in stump distribute from 0～8cm,and concentrated within 0～2cm,and numbers of sprout plantlet in downslope aspect are obviously greater than those of upslope aspect.Average sprout plantlets per stump is 7.7.The growth of sprout pantlets are better than that of root suckers,but the former's regeneration frequency is only 2/5 of the latter's.Methods of sprout and root sucker had better be combined in the clonal regeneration of black locust plantation,but sprout should be regar as main regeneration method.
出处
《陕西林业科技》
北大核心
1994年第2期27-31,共5页
Shaanxi Forest Science and Technology
基金
"八五"国家科技攻关子专题
关键词
人工林
刺槐
无性更新
幼树发生
Plantation
Black locust
Clonal regeneration
Frequency
Growth
