Evaluation of In-Season Nitrogen Management for Summer Maize in North Central China
Table 3
Effects of different N treatments on maize biomass in summer growth season (kg ha−1).
Sites
Treatments
V4†
V7†
R1.5†
R3†
Maturity
Hengshui
N0
48.4b‡
2646.2b
7675.5b
10034.4b
14465.1b
N120 (0/120)
50.5b
2652.2b
7984.5b
11985.3b
16296.5ab
N120 (30/90)
65.7a
3186.4a
8925.0a
12580.0ab
17187.7a
N120 (60/60)
67.6a
3196.1a
8976.4a
13940.3a
18864.5a
N180 (0/180)
52.3b
2822.0ab
7854.6b
12444.5ab
17052.2ab
N180 (45/135)
68.3a
3240.6a
9367.0a
13940.0a
16681.6ab
N180 (90/90)
71.5a
3264.0a
9673.2a
12971.4ab
17603.7a
N240 (0/240)
48.9b
2652.3b
7995.0b
14042.0a
18514.3a
Xinji
N0
58.7c
1086.5c
3645.6d
6856.7d
10680.0c
N120 (0/120)
58.2c
1141.7c
5338.0bc
8440.2c
12592.5b
N120 (30/90)
72.3b
1396.9b
5551.8b
8772.3bc
13779.9ab
N120 (60/60)
79.8ab
1707.6a
6227.8a
9648.1ab
13161.8b
N180 (0/180)
59.5c
1179.2c
4645.7c
8942.3bc
12825.4b
N180 (45/135)
80.3ab
1616.9a
4882.2c
8956.4bc
13791.8ab
N180 (90/90)
88.6a
1664.9a
5953.2ab
9909.5a
13825.9ab
N240 (0/240)
65.4c
1291.4b
4677.9c
9163.3ab
14490.0a
† V4: 4-leaf stage; V7: 7-leaf stage; V10: 10-leaf stage; R1.5: Silking; R3: Milking. ‡Within each column, means followed by different letters are significantly different ().
