Regulating N Application for Rice Yield and Sustainable Eco-Agro Development in the Upper Reaches of Yellow River Basin, China
Table 3
Effect of RPN on rice yield and its components.
Year
Treatment
Panicle length (cm)
Panicle number
Grain number per panicle (×104·ha−1)
1000 grain weight (g)
Average yield (kg/hm2)
Increased yield (kg/hm2)
Ratio (%)
2010
CK
16.2 b
112 c
76.7 c
25.7 a
3990 b
—
—
N300
16.5 b
169 a
109.3 a
21.9 b
9634 a
5644
141.5
N240
19.0 a
141 b
98.6 b
22.0 b
9631 a
5641
141.4
RPN I
19.5 a
152 ab
105.7 a
22.8 ab
10326 a
6336
158.8
RPN II
19.0 a
148 b
92.5 b
23.4 a
10727 a
6737
168.8
2011
CK
12.1 b
105 b
71.8 c
26.1 a
3366 b
—
—
N300
15.4 a
147 a
111.8 a
23.7 b
8676 a
5310
157.8
N240
15.0 a
138 a
106.4 a
23.9 b
8498 a
5132
152.5
RPN I
15.1 a
145 a
109.7 a
24.8 a
8778 a
5412
160.8
RPN II
14.8 a
138 a
99.4 b
24.1 ab
8612 a
5246
155.9
Figures followed by the same letters within a column for different treatments are not significantly different at the significance level based on one-way analysis of variance (ANOVA).
