Table 6.14 Growth, yield, and quality of paddy rice
Experimental
year
Plot
Plant length, culm length (cm)
June
20 (active-tillering
stage)
July 10 (maximum
tiller number stage)
September
10 (maturity
stage)
June
20 (active-tillering
stage)
July 10 (maximum
tiller number stage)
September
10 (maturity
stage)
Brown rice
yield (Mg ha-1)
2011
Shallow tillage in
autumn
39.2
72.9
82.5
578
549
467
6.78
Control (tillage
in spring)
36.4
69.0
82.1
440
499
451
6.51
2012
Shallow tillage in
autumn
31.7
53.1
79.9
480
724
545
6.25
Control (tillage
in spring)
32.0
51.9
80.1
414
684
549
6.31
2013
Shallow tillage in
autumn
36.2
58.5
78.2
437
529
434
6.78
rice straw
without
application
38.5
61.4
81.1
485
588
472
6.95
Control (tillage
in spring)
35.5
54.9
75.3
357
447
385
6.26
ANOVA
Treatment (T)
n.s
n.s
n.s
*
**
n.s
n.s
Year (Y)
**
*
**
*
**
**
n.s
(T)
 (Y)
n.s
n.s
n.s
n.s
n.s
n.s
n.s
*p < 0.05, **p < 0.01, n.s: not significant. Analysis of variance (ANOVA) test
6 Tohoku Region
221