Aerial Nitrogen Fluxes and Soil Nitrate in response to Fall-Applied Manure and Fertilizer Applications in Eastern South Dakota
Table 5
Average ammonia nitrogen fluxes (±standard error)z for the four treatments based on time (sampling day) for Year 1 (Y1) and Year 2 (Y2).
Date
Ammonia nitrogen flux (g·ha−1·hr−1)
Manure with bedding
Manure only
Urea
No fertilizer
Mean
10/30/2015
0.61 ± 0.21
0.59 ± 0.07
0.67 ± 0.07
0.89 ± 0.10
0.69 ± 0.06
11/3/2015
Y1 manure application
11/6/2015
10.41 ± 0.73
1.84 ± 0.59
2.09 ± 0.28
0.64 ± 0.06
3.74 ± 1.03
11/10/2015
8.74 ± 1.83
1.76 ± 0.21
1.7 ± 0.19
1.23 ± 0.06
3.36 ± 0.9
11/16/2015
5.23 ± 1.32
1.32 ± 0.10
1.83 ± 0.23
1.16 ± 0.13
2.39 ± 0.52
4/26/2016
1.44 ± 0.02
1.36 ± 0.07
1.57 ± 0.18
1.49 ± 0.15
1.46 ± 0.06
5/2/2016
Y1 corn planting
5/12/2016
1.39 ± 0.04
1.36 ± 0.09
1.26 ± 0.05
1.21 ± 0.05
1.31 ± 0.03
6/1/2016
1.62 ± 0.07
1.46 ± 0.04
1.36 ± 0.09
1.59 ± 0.06
1.51 ± 0.04
Y1
3.87 ± 1.28
1.49 ± 0.49
1.63 ± 0.54
1.17 ± 0.39
1.79 ± 0.47
11/9/2016
3.12 ± 0.56
2.92 ± 0.36
3.22 ± 0.29
3.92 ± 0.77
3.3 ± 0.26
11/16/2016
Y2 manure application
11/17/2016
14.59 ± 1.57
6.12 ± 0.77
4.74 ± 0.22
5.17 ± 0.5
7.65 ± 1.12
11/22/2016
5.87 ± 1.96
3.58 ± 1.02
9.84 ± 2.76
1.70 ± 0.19
5.25 ± 1.11
12/1/2016
2.98 ± 1.76
0.65 ± 0.05
4.06 ± 2.08
0.64 ± 0.04
2.08 ± 0.72
4/28/2017
1.49 ± 0.31
1.22 ± 0.22
1.14 ± 0.08
1.45 ± 0.14
1.32 ± 0.10
5/6/2017
Y2 corn planting
5/16/2017
1.69 ± 0.07
1.67 ± 0.14
1.60 ± 0.34
1.57 ± 0.12
1.63 ± 0.09
6/2/2017
Y2 corn replanting
6/9/2017
1.37 ± 0.03
1.35 ± 0.03
1.40 ± 0.06
1.38 ± 0.07
1.38 ± 0.02
7/14/2017
2.13 ± 0.32
2.14 ± 0.12
1.94 ± 0.22
1.98 ± 0.18
2.05 ± 0.10
Y2
3.11 ± 1.03
1.99 ± 0.66
3.03 ± 1.01
1.79 ± 0.59
2.36 ± 0.63
Y1Y2
3.40 ± 0.89 a
1.69 ± 0.44 ab
2.18 ± 0.57 ab
1.42 ± 0.37 b
zMean ± SE = estimated mean ± standard error obtained from least squared means table. Different letters in overall mean among the treatments indicate significant difference at . The absence of letters indicates between means.
