Tillage Effects on Soil Biochemical Properties and Maize Grown in Latosolic Red Soil of Southern China
Table 3
Effects of tillage practices on enzymatic activities in the soil in two years.
Depth (cm)
Treatment
2016
2017
Urease [NH4+-N] (mg·kg−1)
Catalase [0.1 NKMO4] (mL·kg−1)
Acid Phosphatase [P2O5] (mL·kg−1)
Urease [NH4+-N] (mg·kg−1)]
Catalase [0.1 NKMO4] (mL·kg−1)]
Acid Phosphatase [P2O5] (mg·kg−1)]
0–10
2RT
406.46 a
1.95 a
412.22 a
408.63 b
2.05 a
423.17 c
2RTSS
418.45 b
1.23 a
426.17 a
420.68 b
1.80 a
428.26 bc
SS
437.22 a
2.05 a
448.37 a
438.56 a
2.18 a
450.23 a
ZT
419.67 b
2.01 a
430.38 a
422.05 b
2.11 a
431.66 b
10–20
2RT
224.25 b
1.30 a
274.43 a
226.1 c
1.35 a
277.07 b
2RTSS
233.70 b
1.23 a
313.69 a
235.25 b
1.31 a
314.36 ab
SS
278.49 a
1.44 a
348.82 a
283.92 a
1.66 a
345.83 a
ZT
236.11 b
1.44 a
334.5 a
239.15 b
1.51 a
335.48 a
20–30
2RT
165.27 b
0.86 ab
225.09 a
167.15 b
0.94 b
227.93 b
2RTSS
125.93 c
0.78 b
216.90 a
127.93 c
0.81 c
217.58 b
SS
226.47 a
1.12 a
242.94 a
228.07 a
1.14 a
251.73 a
ZT
212.79 a
0.94 a
235.54 a
224.22 a
0.98 b
237.2 a
30–40
2RT
112.08 bc
0.82 b
126.46 b
114.70 bc
0.89 b
128.00 c
2RTSS
111.07 c
0.80 b
122.63 b
113.32 c
0.86 b
124.29 d
SS
116.94 a
1.03 a
154.34 a
118.94 a
1.10 a
155.44 a
ZT
115.84 ab
0.96 a
150.48 a
117.07 ab
0.98 b
151.96 b
Values within a column in the same year followed by the same letters are not significantly different (). 2RT: two passes of rotary tillage; 2RTSS: two passes of rotary tillage + subsoiling; SS: subsoiling; ZT: zero tillage.
