Figure 3 | Scientific Reports

Figure 3

From: Emissions of ammonia and hydrogen sulfide from typical dairy barns in central China and major factors influencing the emissions

Figure 3

Comparison of NH3 and H2S concentrations at different locations inside and outside of dairy barns. Measurement was performed at 36 outside locations (11 exercising areas, 3 manure storage areas and 22 upwind blank areas 20 m away from the barn) and 55 inside locations (22 cow bed locations, 22 manure areas and 11 feeding alley). Each location was sampled both near the floor and at 1.5 m above the floor. Measurements were made every 2 hours for 48 hours. The NH3 or H2S concentrations were the average of the values measured both at 0 m and 1.5 m during 48 hours. The different letters within the same panel are significantly different (P < 0.05).

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