Table 5 Spring maize yield influenced by tillage and residue treatments in 2014 and 2015.

From: Short-term effects of tillage and residue on spring maize yield through regulating root-shoot ratio in Northeast China

Treatment

Yield (t ha−1)

2014

2015

RR

RI

RR

RI

PT

9.9 ± 0.76c

10.65 ± 0.43b

8.1 ± 0.10c

8.63 ± 0.46c

RT

10.57 ± 0.51b

10.79 ± 0.41b

9.97 ± 0.53b

11.44 ± 0.61b

NT

11.05 ± 0.18a

11.7 ± 0.46a

12.23 ± 0.65a

12.98 ± 0.69a

Analysis of variance

 T

**

 

***

 

 R

*

 

**

 

 T*R

ns

 

ns

 
  1. PT, RT and NT indicate plow-till, rotary-till and no-till, respectively. RR and RI indicate residue removal and residue incorporation, respectively. T and R indicate tillage and residue treatments, respectively. Values are expressed as the mean ± standard error. Different lowercase letters on mean values indicate significant differences at P < 0.05. Differences are significant at P < 0.05 between residue removal and residue incorporation under different tillage treatments except for figures marked A. *P < 0.05; **P < 0.01; ***P < 0.001; ns, not significant.
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