Effect of weed competition period on yield components of aerobic rice variety AERON 1 in both seasons (off-season 2010 and main season 2010/2011).
Weed competition period
Off-season 2010
Main season 2010/2011
Panicles (no./m2)
Grains/panicle (no.)
1000-seed weight (g)
Grain yield (t/ha)
Panicles (no./m2)
Grains/panicle (no.)
1000-seed weight (g)
Grain yield (t/ha)
Weedy until 2 WAS
191.0ab
72.6ab
27.2ab
3.37ab
177.0a–c
72.3ab
27.5ab
3.46ab
Weedy until 4 WAS
163.6bc
68.3a–c
27.0b
2.99a–c
162.3bc
65.6a–c
27.0cd
3.07bc
Weedy until 6 WAS
150.3cd
59.0b–d
26.5bc
2.5c–e
148.0c
62.6a–c
26.2f
2.59d
Weedy until 8 WAS
134.0c–e
51.0d
26.1cd
1.98e–f
147.3cd
60.3bc
25.0g
2.01e
Weedy check
104.0e
50.3d
24.2e
1.68f
91.6e
53.3c
24.2h
1.73e
Weed-free until 2 WAS
118.3de
55.0cd
25.5d
2.22df
110.3de
59.6bc
26.4ef
2.43d
Weed-free until 4 WAS
135.3c–e
55.3cd
26.1cd
2.79b–d
140.6cd
61.6bc
26.6e
3.01c
Weed-free until 6 WAS
152.6cd
67.3a–c
26.5bc
3.22ab
165.3bc
63.6a–c
26.7de
3.51a
Weed-free until 8 WAS
193.3ab
72.3ab
27.1ab
3.49a
198.3a
67.3ab
27.1bc
3.76a
Weed-free check
199.0a
74.3a
27.8a
3.61a
205.6a
73.3a
27.8a
3.84a
Within a column for each factor, means sharing same alphabets are not significantly different at probability level according to least significant difference test. WAS = weeks after seeding.
