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Table 1 Effects of plant growth regulators on yield and its components of cultivars of Peizataifeng and Huayou 86 in both early and late seasons in 2007

From: Roles of plant growth regulators on yield, grain qualities and antioxidant enzyme activities in super hybrid rice (Oryza sativa L.)

Treatments

Panicle number (m-2)

No. of Spikelets per panicle

Grain filling percentage (%)

1000-grain-weight (g)

Yield (kg ha-1)

2007 early rice

      

Peizataifeng

CK

250 b

179.5 b

78.1 b

22.1 a

6807.7 b

 

GA3

258 b

205.3 a

86.7 a

22.2 a

6565.0 b

 

PBZ

258 b

198.0 a

85.8 a

23.1 a

7388.3 a

 

6-BA

275 a

196.8 a

84.6 a

22.8 a

7626.7 a

 

mean

260 A

194.9 A

83.8 A

22.5 A

7096.9 B

Huayou86

CK

228 b

140.6 a

80.4 b

19.8 b

7583.3 a

 

GA3

271 a

122.9 b

86.2 a

20.0 b

7020.0 a

 

PBZ

275 a

145.4 a

86.6 a

21.6 a

7930.0 a

 

6-BA

258 ab

138.3 b

84.5 a

21.7 a

7940.7 a

 

mean

258 A

136.8 B

84.4 A

20.7 B

7618.5 A

2007 late rice

      

Peizataifeng

CK

273 a

135.0 b

80.8 b

21.7 b

7080.0 b

 

GA3

276 a

141.4 ab

86.9 a

21.9 ab

7920.1 a

 

PBZ

266 a

135.6 b

84.3 a

23.0 a

7740.0 ab

 

6-BA

273 a

149.2 a

83.9 a

22.6 a

7680.7 ab

 

mean

272 A

140.3 B

84.0 B

22.3 A

7605.0 B

Huayou86

CK

265 b

165.3 a

86.9 a

20.4 a

8280.0 a

 

GA3

280 a

171.8 a

89.7 a

20.7 a

9040.0 a

 

PBZ

269 b

168.3 a

88.9 a

20.4 a

8406.0 a

 

6-BA

283 a

168.4 a

88.4 a

20.2 a

8620.0 a

 

mean

274 A

168.5 A

88.4 A

20.5 B

8586.5 A

  1. Within a column for two groups of genotypes, common letters are not significantly different at the 5% level.