Manure is a primary source of methane (CH4) emissions into the atmosphere. A large proportion of CH4 from manure is emitted during storage, but this varies with storage methods. In this research, we tested whether covering a manure heap with plastic reduces CH4 emission during a short-term composting process. A static chamber method was used to detect the CH4 emission rate and the change of the physicochemical properties of cattle manure which was stored either uncovered (treatment UNCOVERED) or covered with plastic (treatment COVERED) for 30-day periods during the four seasons? The dry matter content of the COVERED treatment was significantly less than the UNCOVERED treatment (P < 0.01), and the C/N ratio of the COVERED treatment significantly greater than the UNCOVERED treatment (P > 0.05) under high temperature. In the UNCOVERED treatment, average daily methane (CH4) emissions were in the order summer > spring > autumn > winter. CH4 emissions were positively correlated with the temperature (R2 = 0.52, P < 0.01). Compared to the UNCOVERED treatment, the daily average CH4 emission rates from COVERED treatment manure were less in the first 19 days of spring, 13 days of summer, 10 days of autumn and 30 days of winter. In summary, covering the manure pile with plastic reduces the evaporation of water during storage; and in winter, long-term covering with plastic film reduces the CH4 emissions during the storage of manure.

中文翻译：

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不同季节有无塑料盖的短期储存牛粪的甲烷排放

粪便是甲烷（CH4) 排放到大气中。很大一部分 CH4粪便在储存过程中排放，但这因储存方法而异。在这项研究中，我们测试了用塑料覆盖粪堆是否会减少 CH4短期堆肥过程中的排放。静态室法用于检测 CH4牛粪的排放率和理化性质的变化，在四个季节中，无论是裸露（处理 UNCOVERED）还是用塑料覆盖（处理 COVERED）30 天？COVERED 处理的干物质含量显着低于 UNCOVERED 处理（磷< 0.01），COVERED 处理的 C/N 比显着大于 UNCOVERED 处理（磷> 0.05) 在高温下。在 UNCOVERED 处理中，平均每日甲烷 (CH4) 排放的顺序是夏季 > 春季 > 秋季 > 冬季。甲烷4排放量与温度呈正相关（R2= 0.52,磷< 0.01)。与 UNCOVERED 治疗相比，日平均 CH4在春季前 19 天、夏季 13 天、秋季 10 天和冬季 30 天，COVERED 处理粪便的排放率较低。总之，用塑料覆盖粪堆可以减少储存过程中水分的蒸发；而在冬季，长期用塑料薄膜覆盖可降低 CH4粪便储存过程中的排放。