Table 1. Effects of fertilizations on the soil chemical properties.
De | Tr | OC g kg−1 | TN g kg−1 | C/N | AN mg kg−1 | AP mg kg−1 | pH |
---|---|---|---|---|---|---|---|
June 2016 | |||||||
0–10 cm | CK | 10.09 ± 0.23a | 0.87 ± 0.02a | 11.57 ± 0.05a | 98.70 ± 1.21a | 3.58 ± 1.31c | 7.83 ± 0.11a |
P | 9.69 ± 0.23a | 0.98 ± 0.03a | 9.92 ± 0.36b | 100.80 ± 5.28a | 14.43 ± 0.51a | 7.75 ± 0.09a | |
N | 10.85 ± 0.68a | 1.07 ± 0.02a | 10.13 ± 0.57b | 103.60 ± 2.80a | 6.33 ± 2.35bc | 7.58 ± 0.16a | |
NP | 9.96 ± 0.13a | 1.16 ± 0.01a | 8.59 ± 0.13c | 107.10 ± 3.21a | 13.91 ± 0.55a | 7.75 ± 0.09a | |
M | 10.80 ± 0.29a | 1.12 ± 0.02a | 9.67 ± 0.17b | 101.50 ± 12.38a | 10.48 ± 3.27ab | 7.82 ± 0.06a | |
10–20 cm | CK | 8.34 ± 0.59a | 0.88 ± 0.06a | 9.56 ± 0.56ab | 79.80 ± 4.85a | 1.83 ± 0.80b | 7.99 ± 0.09a |
P | 7.77 ± 0.29a | 0.91 ± 0.05a | 8.53 ± 0.17bc | 83.13 ± 3.20a | 6.25 ± 1.09a | 7.71 ± 0.12a | |
N | 8.38 ± 0.09a | 0.94 ± 0.03a | 8.97 ± 0.36bc | 72.80 ± 1.40a | 4.17 ± 0.36ab | 7.82 ± 0.09a | |
NP | 7.67 ± 0.01a | 0.92 ± 0.01a | 8.33 ± 0.11c | 86.63 ± 6.26a | 2.83 ± 0.36ab | 8.02 ± 0.12a | |
M | 9.52 ± 0.12a | 0.91 ± 0.02a | 10.45 ± 0.38a | 72.80 ± 1.40a | 3.67 ± 2.10ab | 8.04 ± 0.08a | |
July 2016 | |||||||
0–10 cm | CK | 10.51 ± 0.40a | 1.05 ± 0.02a | 10.00 ± 0.47c | 88.90 ± 9.42a | 2.92 ± 0.10c | 7.85 ± 0.19a |
P | 12.13 ± 0.47a | 0.88 ± 0.001a | 13.84 ± 0.55a | 97.30 ± 3.90a | 19.44 ± 1.83a | 7.75 ± 0.14a | |
N | 12.44 ± 0.18a | 1.03 ± 0.05a | 12.15 ± 0.64b | 98.70 ± 9.15a | 3.79 ± 0.83c | 7.37 ± 0.15a | |
NP | 12.13 ± 0.83a | 1.18 ± 0.04a | 10.28 ± 0.61c | 109.90 ± 5.47a | 11.25 ± 2.66b | 7.59 ± 0.16a | |
M | 10.83 ± 0.18a | 1.19 ± 0.05a | 9.12 ± 0.21c | 93.10 ± 8.94a | 4.23 ± 1.51c | 7.63 ± 0.15a | |
10–20 cm | CK | 9.46 ± 0.24a | 0.88 ± 0.02a | 10.71 ± 0.12a | 72.10 ± 2.80a | 2.52 ± 0.12b | 8.05 ± 0.12a |
P | 9.60 ± 0.14a | 0.85 ± 0.03a | 11.32 ± 0.47a | 74.90 ± 9.10a | 4.16 ± 0.38a | 8.19 ± 0.16a | |
N | 9.77 ± 0.65a | 0.91 ± 0.01a | 10.74 ± 0.78a | 77.70 ± 9.92a | 2.15 ± 0.34b | 7.86 ± 0.03a | |
NP | 8.53 ± 0.42a | 1.00 ± 0.03a | 8.55 ± 0.29b | 89.60 ± 6.22a | 2.75 ± 0.66b | 8.04 ± 0.09a | |
M | 10.38 ± 0.65a | 0.99 ± 0.06a | 10.51 ± 0.31a | 90.3 ± 10.57a | 1.98 ± 0.19b | 8.00 ± 0.07a | |
August 2016 | |||||||
0–10 cm | CK | 9.25 ± 0.05a | 1.26 ± 0.03a | 7.37 ± 0.18a | 92.17 ± 6.27a | 3.38 ± 0.57c | 7.78 ± 0.12a |
P | 11.32 ± 0.08a | 1.23 ± 0.01a | 9.23 ± 0.14a | 94.73 ± 3.06a | 15.17 ± 3.47a | 7.64 ± 0.10a | |
N | 10.29 ± 0.87a | 1.42 ± 0.12a | 7.28 ± 0.41a | 106.6 ± 15.16a | 3.22 ± 0.50c | 7.45 ± 0.12b | |
NP | 9.00 ± 0.44a | 1.36 ± 0.01a | 6.61 ± 0.35a | 107.10 ± 8.17a | 11.85 ± 2.49ab | 7.44 ± 0.06b | |
M | 10.15 ± 0.00a | 1.23 ± 0.04a | 8.29 ± 0.24a | 92.26 ± 2.03a | 8.17 ± 2.23bc | 7.49 ± 0.03a | |
10–20 cm | CK | 9.50 ± 0.16a | 1.09 ± 0.003a | 8.75 ± 0.12b | 80.73 ± 3.93a | 2.31 ± 0.30c | 8.07 ± 0.15a |
P | 10.66 ± 0.21a | 1.02 ± 0.01a | 10.43 ± 0.15b | 77.93 ± 2.63a | 5.32 ± 1.64ab | 8.00 ± 0.08a | |
N | 8.78 ± 0.32a | 1.15 ± 0.07a | 6.88 ± 0.21b | 74.20 ± 10.01a | 2.28 ± 0.27c | 8.04 ± 0.28a | |
NP | 7.91 ± 0.13a | 1.12 ± 0.03a | 7.06 ± 0.27b | 72.80 ± 1.85a | 7.35 ± 1.02a | 7.92 ± 0.03a | |
M | 9.78 ± 0.02a | 1.00 ± 0.05a | 9.82 ± 0.50a | 78.26 ± 7.40a | 3.62 ± 0.18bc | 7.76 ± 0.01a |
Notes.
Different lowercase letters after the data within each soil layer represented significance at P < 0.05 (l.s.d).
De, depth; Tr, treatment; CK, Control; P, 60 kg P ha−1; N, 100 kg N ha−1; NP, 60 kg P ha−1 plus 100 kg N ha−1; M, 4,000 kg sheep manure ha−1. OC, organic C; TN, total N; AN, alkali dispelled N; AP, available P. Values were the means of three replicates ± SE.