杉木萌芽更新数量特征的初步研究

Effects of diameter and height of stump on sprout regeneration of Cunninghamia lanceolata

采用随机抽样的方法对杉木林采伐迹地上杉木萌芽更新状况进行调查分析。结果表明,杉木伐桩粗度和高度对杉木萌芽条的数量有显著影响,但对萌芽条长度和直径影响不显著。就伐桩粗度而言,中径级(10-30 cm)伐桩的萌芽条数量、长度和直径均较大;次大径级(30-40 cm)伐桩的萌芽直径最大,但萌芽条数量和长度较小;而小径级(0-10 cm)和大径级(40-50 cm)伐桩的萌芽条数量、长度和直径均不理想。就伐桩高度而言,低根桩(0-5 cm)的萌芽条数量、长度和直径均最大。

Random sampling method was used to investigate the conditions of the sprout regeneration in a clear-cutting site of Cunninghamia lanceolata plantation in Jiangle County. The results showed that diameter and height of stumps significantly affected the amount of sprouting saplings, but did not influence the length and diameter of sprouting saplings. As to the diameter of stumps, the sprout number, length and diameter of medium diameter （10 -30 cm） stumps were all greater. And sprout diameter of the second largest diameter （30 -40 cm） stumps was the most largest, but sprout number and length of which were smaller. Sprout number, length and diameter of the smallest diameter （0 - 10 cm） and the largest diameter （40 -50 cm） stumps were not ideal. As to the height of stumps, sprout number, length and diameter of the low height （0 -5 cm） stumps were the largest.