Increased Individual Tree Growth Maintains Stand Volume Growth after B-Level Thinning and Crop-Tree Management in Mature Oak Stands
Increased Individual Tree Growth Maintains Stand Volume Growth after B-Level Thinning and Crop-Tree Management in Mature Oak Stands
复制标题
在成熟橡树林中进行 B 级间伐和作物树木管理后，单棵树生长的增加可保持林分体积的增长
DOI：
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发表时间：
2019
期刊：
影响因子：
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通讯作者：
Jessica L. Wikle
中科院分区：
文献类型：
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作者：
J. Ward;Jessica L. Wikle
六个研究领域建立在80-125岁的高地橡树站在平均站点比较立场和个别树木的生长反应后，两个积极的治疗（B级间伐，作物树）与非管理控制。在B级和作物树管理地块上，104%的初始蓄积量分别减少到62%和60%。在积极管理的地块上，每英亩收获约7，200板英尺（国际¼），高地橡树占前林分的81%和剩余林分的86%。在积极管理的地块上，橡树锯材树的11年直径和体积增长更大。生长反应随释放程度增加而增加，并在研究期间保持不变。由于橡树的个体生长的增加，响应释放，橡树锯材的林分体积增长没有不同的治疗。与此相反，11年的下降poletimber库存未管理的地块，poletimber库存增加管理地块的直径增长增加，响应部分释放。这可能会增加将来再生橡树的难度。对于那些成熟的红橡木林，传统的再生处方将不会被实施或将被推迟，商业收获可以进行不影响林分体积生长的橡树。
Six study areas were established in 80–125-year-old upland oak stands on average sites to compare stand and individual tree growth response following two active treatments (B-level thinning, crop tree) with an unmanaged control. Initial stocking of 104 percent was reduced to 62 percent and 60 percent on the B-level and crop-tree-management plots, respectively. Approximately 7,200 board feet per acre (International ¼) were harvested on the actively managed plots with upland oaks accounting for 81 percent of pre- and 86 percent of residual stand. Eleven-year diameter and volume growth of oak sawtimber trees was greater on actively managed plots. Growth response increased with degree of release and was maintained for the length of the study. Because of the increased individual tree growth of oaks in response to release, stand volume growth of oak sawtimber did not differ between treatments. In contrast to an 11-year decline of poletimber stocking on unmanaged plots, poletimber stocking increased on managed plots as diameter growth increased in response to partial release. This may increase difficulty of regenerating oak in the future. For those mature red oak stands where traditional regeneration prescriptions will not be implemented or will be delayed, commercial harvests can be conducted without compromising stand volume growth of oak.