The effects of a thinning treatment on soil respiration (Rs) were analysed in two dryland forest types with a Mediterranean climate in east Spain: a dry subhumid holm oak forest (Quercus ilex subsp. ballota) in La Hunde; a semiarid postfire regenerated Aleppo pine (Pinus halepensis) forest in Sierra Calderona. Two twin plots were established at each site: one was thinned and the other was the control. Rs, soil humidity and temperature were measured regularly in the field at nine points per plot distributed into three blocks along the slope for 3 years at HU and for 2 years at CA after forest treatment. Soil heterotrophic activity was measured in laboratory on soil samples obtained bimonthly from December 2012 to June 2013 at the HU site. Seasonal Rs distribution gave low values in winter, began to increase in spring before lowering as soil dried in summer. This scenario indicates that with a semiarid climate, soil respiration is controlled by both soil humidity and soil temperature. Throughout the study period, the mean Rs value in the HU C plot was 13% higher than at HU T, and was 26% higher at CA C than the corresponding CA T plot value, being the differences significantly higher in control plots during active growing periods. Soil microclimatic variables explain the biggest proportion of variability for Rs: soil temperature explained 24.1% of total variability for Rs in the dry subhumid forest; soil humidity accounted for 24.6% of total variability for Rs in the semiarid forest. As Mediterranean climates are characterised by wide interannual variability, Rs showed considerable variability over the years, which can mask the effect caused by thinning treatment.

在西班牙东部具有地中海气候的两种旱地森林类型中分析了间伐处理对土壤呼吸 (Rs) 的影响：La Hunde的干燥半湿润圣栎林（Quercus ilex subsp. ballota）；半干旱的火后再生阿勒颇松（Pinus halepensis）) 山脉卡尔德罗纳的森林。在每个地点建立两个孪生地块：一个是变薄的，另一个是对照。Rs、土壤湿度和温度在田间定期测量，每块样地 9 个点，沿斜坡分布在三个街区，在 HU 进行 3 年，在森林处理后在 CA 进行 2 年。土壤异养活性是在实验室中对 2012 年 12 月至 2013 年 6 月在 HU 场地每两个月获得的土壤样品进行测量的。季节性 Rs 分布在冬季给出较低的值，春季开始增加，然后随着夏季土壤干燥而降低。该情景表明，在半干旱气候下，土壤呼吸受土壤湿度和土壤温度的控制。在整个研究期间，HU C 图中的平均 Rs 值比 HU T 高 13%，并且在 CA C 处比相应的 CA T 地块值高 26%，这是在活跃生长期间对照地块的差异显着更高。土壤小气候变量解释了最大比例的 Rs 变异性：土壤温度解释了干燥半湿润森林中 Rs 总变异性的 24.1%；土壤湿度占半干旱森林 Rs 总变异性的 24.6%。由于地中海气候的特点是年际变化很大，因此多年来 Rs 表现出相当大的变化，这可能掩盖了变薄处理造成的影响。干燥半湿润森林中 Rs 总变异性的 1%；土壤湿度占半干旱森林 Rs 总变异性的 24.6%。由于地中海气候的特点是年际变化很大，因此多年来 Rs 表现出相当大的变化，这可能掩盖了变薄处理造成的影响。干燥半湿润森林中 Rs 总变异性的 1%；土壤湿度占半干旱森林 Rs 总变异性的 24.6%。由于地中海气候的特点是年际变化很大，因此多年来 Rs 表现出相当大的变化，这可能掩盖了变薄处理造成的影响。