Understory vegetation, resource availability, and litterfall responses to pine thinning and woody vegetation control in longleaf pine plantations
Understory vegetation, resource availability, and litterfall responses to pine thinning and woody vegetation control in longleaf pine plantations
复制标题
长叶松人工林的林下植被、资源可用性和凋落物对松树间伐和木本植被控制的反应
DOI：
10.1139/x99-118
复制
发表时间：
1999
影响因子：
2.2
通讯作者：
M. Edwards
中科院分区：
文献类型：
--
作者：
T. Harrington;M. Edwards
在美国南卡罗来纳州Aiken附近的6个8 ~ 11年生长叶松人工林中，研究了林下植被、光照、土壤水分有效性和凋落物对松林间伐（1994年5月）、非松木植被除草剂处理（1995-1996年）或联合处理（下面描述的处理响应以绝对单位表示）的响应。第5年（1998）草本物种密度的处理差异为：松木间伐+木本控制+联合处理+未处理（分别为33、30、30和25种/ 40 m2）。松木间伐后，林草覆盖面积分别增加了13%和8%，木本间伐后，林草覆盖面积分别增加了7%和9%。松林间伐导致第三年林隙分数大幅增加（0.26），土壤含水量短期增加（1%），松林凋落物减少一半（-120 g·m-2 /年）。木本控制对林间隙分数无影响，非松木植被凋落物减少（-32 g·m-2 /年）。
In six 8- to 11-year-old plantations of longleaf pine (Pinus palustris Mill.) near Aiken, S.C., responses of understory vegetation, light, and soil water availability and litterfall were studied in relation to pine thinning (May 1994), herbicidal treatment of nonpine woody vegetation (1995-1996), or the combined treatments (treatment responses described below are in absolute units). Treatment differences in fifth-year (1998) herbaceous species density were as follows: pine thinning > woody control = combined treatments > untreated (33, 30, 30, and 25 species per 40 m2, respectively). Forb and grass covers were 13 and 8% greater, respectively, after pine thinning and 7 and 9% greater after woody control. Pine thinning stimulated a large increase in third-year gap fraction (0.26), short-term increases in soil water content (1%), and a reduction in pine litterfall by half (-120 g·m-2 per year). Woody control had no effect on gap fraction, decreased litterfall of nonpine woody vegetation (-32 g·m-2 per year),...