Short‐term effects of organic matter and compaction manipulations on soil temperature, moisture, and soil respiration for 2 years in the Oregon Cascades
Short‐term effects of organic matter and compaction manipulations on soil temperature, moisture, and soil respiration for 2 years in the Oregon Cascades
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有机质和压实操作对俄勒冈喀斯喀特地区土壤温度、湿度和土壤呼吸的短期影响长达 2 年
DOI：
10.1002/saj2.20485
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发表时间：
2023
影响因子：
2.9
通讯作者：
Hatten, Jeff A.
中科院分区：
文献类型：
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作者：
Gallo, Adrian C.;Holub, Scott M.;Littke, Kim;Lajtha, Kate;Maguire, Doug;Hatten, Jeff A.
了解控制养分动态的因素可以帮助指导森林管理计划，以提高其长期生产力。我们使用了三个层次的生物量去除和两个层次的压实的实验处理，监测对集约经营的森林土壤生物物理特性的影响。土壤温度，湿度和呼吸观测开始后6个月处理安装完成，并持续2年。压实测量变量有几个一致的显着影响，有体积土壤含水量之间的差异可以忽略不计的全树（WT）和树干（BO）收获。与BO相比，WT的10厘米平均和最高生长季节温度分别显著增加了1.2和2.5 °C。WT去除的影响导致整个剖面（10-100厘米）的平均和最高生长季节土壤温度的增加。与BO相比，WT去除导致10 cm处的土壤生长度日（SGDD）增加1.4倍，100 cm处的土壤生长度日增加1.6倍。尽管有利的温度和水分条件下，土壤呼吸的差异不能解释生物量或压实处理。未砍伐的参考森林始终凉爽和干燥，但呼吸更多的CO2在这两年的观察相比，处理区。在随后的2年研究期内，研究中心森林采伐的大规模物理干扰可能通过抑制微生物反应掩盖了任何递增的处理差异。未来的研究应继续调查这些土壤生物物理变化是否影响网站的生产力或更敏感的土壤碳动态指标。
Understanding the factors controlling nutrient dynamics can help guide forest management plans to promote their long‐term productivity. We used experimental treatments with three levels of biomass removals and two levels of compaction to monitor the impacts to soil biophysical characteristics in an intensively managed forest. Soil temperature, moisture, and respiration observations began 6 mo after treatment installation completion and continued for 2 yr. Compaction had few consistent significant effects on measured variables, and there were negligible differences in volumetric soil water content between whole tree (WT) and bole only (BO) harvesting. Compared with BO, the 10‐cm average and maximum growing season temperatures in WT significantly increased by 1.2 and 2.5 °C, respectively. The effects of WT removals resulted in whole profile (10–100 cm) increases in the average and maximum growing season soil temperatures. The WT removals resulted in an increase of 1.4 times more soil growing degree days (SGDD) at 10 cm and 1.6 times more at 100 cm compared with BO. Despite favorable temperature and moisture conditions, differences in soil respiration could not be explained by biomass or compaction treatments. The uncut reference forest was consistently cooler and drier, but respired more CO2throughout both years of observation compared with treated areas. The large physical disturbance of forest harvesting on the site likely masked any incremental treatment differences by homogenizing the microbial response in the ensuing 2‐yr study period. Future research should continue to investigate whether these soil biophysical changes influence site productivity or more sensitive indices of soil C dynamics.