Research Article
Regulating N Application for Rice Yield and Sustainable Eco-Agro Development in the Upper Reaches of Yellow River Basin, China
Table 4
Total N accumulative leaching at rice growth stages (kg·ha−1).
| | Year | Treatment | Growth stage | | Seedling stage | Tillering stage | Booting stage | Flowering stage | Heading stage | Harvest stage | Sum |
| | 2010 | CK | 1.58 d | 5.11 d | 2.76 b | 2.42 c | 1.22 c | 0.50 c | 13.60 d | | N300 | 11.24 a | 19.31 a | 8.45 a | 3.15 b | 1.47 c | 0.89 bc | 44.51 a | | N240 | 8.24 b | 13.98 b | 7.42 a | 2.98 bc | 1.12 c | 0.45 c | 34.19 b | | RPN I | 5.14 c | 10.34 c | 8.16 a | 3.35 b | 2.47 b | 1.32 b | 30.78 c | | RPN II | 5.22 c | 7.96 c | 8.24 a | 4.14 a | 3.72 a | 2.04 a | 31.32 bc |
| | 2011 | CK | 1.07 d | 3.45 e | 1.87 d | 1.64 d | 0.82 e | 0.34 d | 9.19 d | | N300 | 8.96 a | 17.45 a | 6.86 a | 3.25 b | 1.97 c | 1.31 b | 39.8 a | | N240 | 6.03 b | 14.47 b | 5.56 b | 2.47 c | 1.43 d | 0.62 c | 30.58 b | | RPN I | 3.42 c | 8.91 c | 4.67 c | 3.87 a | 3.12 b | 1.36 b | 25.35 c | | RPN II | 3.08 c | 6.74 d | 6.52 a | 4.07 a | 4.94 a | 2.36 a | 27.71 bc |
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