EFFECTS OF THINNING ON WATER-STRESS AND GROWTH IN DOUGLAS-FIR
EFFECTS OF THINNING ON WATER-STRESS AND GROWTH IN DOUGLAS-FIR
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DOI：
10.1139/x88-015
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发表时间：
1988-01-01
影响因子：
2.2
通讯作者：
GRANIER, A
中科院分区：
文献类型：
--
作者：
AUSSENAC, G;GRANIER, A
在法国东北部研究了系统间伐（行间伐）对19年道格拉斯冷杉人工林水分胁迫和生长的影响。间伐对水分平衡有重要影响。土壤水分储量的增加导致疏地的水分胁迫持续时间和水平降低，特别是在疏地后的前3年。研究结果表明，两个样地（对照和疏林）的蒸散比在疏林后的第1年由0.83增加到第5年的1.03，水分平衡发生了快速演变。再加上小气候的影响，间伐大大增加了树木的生长（超过100%）；这种增长是由于更高的生长速度和更长的生长周期（从26天到49天）。
The effects of a systematic thinning (alternate row) on water stress and growth in a 19-year-old Douglas-fir plantation (Pseudotsuga menziesii var. menziesii Franco) was studied durign 5 years in northeastern France. Thinning has an important effect on water balance. The increase of the soil water reserve led to a lower duration and level of water stress in the thinned plot, especially during the frist 3 years after thinning. This study revealed a rapid evolution of the water balance, since the evapotranspiration ratio of the two plots (control and thinned) had increased from 0.83 during the 1st year to 1.03 during the 5th year after thinning. Together with microclimate influences, thinning increased tree growth substantially (more than 100%); this growth increase resulted from a higher growth rate and longer growth periods (from 26 to 49 days).