密度调节与轮闲制采笋对筇竹林竹笋—幼竹生长的影响

THE EFFECTS OF DENSITY REGULATION AND ROTATIONAL HARVESTING SHOOT ON THE SHOOT AND YOUNG BAMBOO GROWTH OF QIONGZHUEA TUMIDINODA FOREST

以无性系植物的生理整合作用理论为指导 ,通过不同密度处理系列试验、采笋与不采笋对比试验等 ,探讨了密度调节、轮闲制采笋与筇竹林竹笋—幼竹生长的关系。结果表明 ,将 4～ 5a生老龄母竹全部砍伐的处理对子代分株密度具有显著的影响 ,其 1a生分株数量是全部保留处理的 1 92倍。轮闲制采笋的处理则有利于子代分株个体的改良 ,1a生分株的平均胸径和平均高度是未处理的 1 5倍和 1 4倍 ;而连年采笋的筇竹林分 ,随时间进程子代分株表现出趋矮的迹象。

The effects of density regulation and rotation harvesting shoot on the shoot and young bamboo growth were studied under the different experimental treatments.The results indicated that:①The number of 1 year old daughter ramets in the treatment of 4～5 year old mother ramets cutting was 1.92 times over that in the no cutting treatment; ②The rotational harvesting shoot improved the growth of daughter ramets, so the growth increments in height and diameter of 1 year old ramets were 1.5 and 1.4 times than those without treatment; ③There was a tend that the daughter ramets become short under the condition of current annual shoot picking.