Aim of the current paper is the monitoring of feedstock losses during a five-month storage period of olive tree pruning (OTP) hog fuel, by comparing two storage solutions: i) uncovered, open-air storage and ii) fleece-covered open-air storage. For this task, two identical conical piles of harvested prunings were built and monitored for calculating the changes in dry matter and energy value of the stored material over time. One pile was left uncovered, while the other was covered with a breathable fleece. For each pile, net bags were used in order to obtain samples for analysis. Overall, the covered pile showed improved storage performance than the uncovered pile, which was much more influenced on weather conditions. The covered pile presented i) lower dry matter losses after five months of storage with an average value of 1.1% compared to 4.6% of the uncovered pile; ii) stable moisture content throughout the storage period at around 10% (as received), compared to the fluctuating moisture content of the uncovered pile from 11% to 24%; and finally, iii) recoverable energy gain with an average pile value of 12.1% compared to recoverable energy loss of 5.1% in the uncovered pile after the storage period.

本论文的目的是通过比较两种存储解决方案来监测橄榄树修剪 (OTP) 生猪燃料五个月存储期间的原料损失：i) 裸露的露天存储和 ii) 羊毛覆盖的露天存储空气储存。对于这项任务，我们建造了两个相同的圆锥形收获修剪堆，并对其进行了监测，以计算储存材料的干物质和能量值随时间的变化。一堆没有被覆盖，而另一堆则覆盖着透气的羊毛。对于每一堆，使用网袋以获得用于分析的样品。总体而言，覆盖桩比未覆盖桩表现出更好的存储性能，后者受天气条件的影响更大。覆盖桩表现出 i) 储存五个月后干物质损失较低，与 4 个月相比平均值为 1.1%。未覆盖桩的 6%；ii) 与未覆盖桩的含水量从 11% 到 24% 的波动相比，整个储存期间的含水量稳定在 10% 左右（收到时）；最后，iii) 平均桩值为 12.1% 的可恢复能量增益，而在储存期后未覆盖桩的可恢复能量损失为 5.1%。