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首页> 外文期刊>Journal of material cycles and waste management >The seasonal effects of manure management and feeding strategies on hydrogen sulphide emissions from stored dairy manure
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The seasonal effects of manure management and feeding strategies on hydrogen sulphide emissions from stored dairy manure

机译：粪肥管理和饲喂策略对储存的乳牛粪中硫化氢排放的季节性影响

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摘要

The influence of temperature and storage time on hydrogen sulphide (H2S) emissions from two different dairy manures was investigated over four seasons in 2012. Two separate experiments were conducted using dairy manure; (1) water baths at 0, 5, 10, 15, 20, 25 and 30 A degrees C that were incubated for 15 h, and (2) 28-day batch experiment under room temperature. The headspace H2S concentration increased exponentially after 15 A degrees C and reached a maximum of 3.1 mg/L at 30 A degrees C. After the 4th day of storage, dairy manure emitted an average of 3.6 mg/L of H2S. However, a small decrease was observed on the 28th day, with a concentration of 2.8 mg/L. Under natural conditions, dairy manure emitted significantly lower H2S values during winter than during spring, summer and autumn when manure is widely used as fertiliser. Furthermore, regardless of the incubation temperature and storage time, manure from cows fed with concentrate-based feed emitted much higher H2S (6.5 times) than from cows fed with forage-based feed. These results indicated that the emissions of H2S from dairy manure could be managed by feeding cows minimal concentrate feed and by handling manure at cooler temperatures or lengthening the retention time.
机译：在2012年的四个季节中，研究了温度和储存时间对两种不同奶牛粪中硫化氢（H2S）排放的影响。 （1）在0、5、10、15、20、25和30 A的水浴中孵育15小时，以及（2）在室温下进行28天的分批实验。顶空的H2S浓度在15 A摄氏度后呈指数增加，在30 A摄氏度达到最高3.1 mg / L。储存第4天后，奶牛粪便平均释放出3.6 mg / L H2S。但是，在第28天观察到少量下降，浓度为2.8 mg / L。在自然条件下，当粪便被广泛用作肥料时，冬季的奶牛粪便排放的H2S值明显低于春季，夏季和秋季。此外，无论孵化温度和储存时间如何，饲喂浓缩饲料的母牛的粪便中的H2S含量（6.5倍）要比饲喂饲喂饲料的母牛高。这些结果表明，可以通过饲喂奶牛最少的浓缩饲料和在较低的温度下处理粪肥或延长保留时间来控制奶牛粪中H2S的排放。

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