Table 5 Yield components of four rice cultivars grown under four cultivation methods in the ratoon rice season in 2017–2020.

From: Impact of tillage and crop establishment methods on rice yields in a rice-ratoon rice cropping system in Southwest China

Variable

Panicles per m2

Spikelets per panicle

 × 103 Spikelets per m2

Grain filling (%)

Grain weight (mg)

Treatment (T)a

CTDS

352.2 a

55.8 b

18.5 a

72.9 b

21.1 a

NTDS

327.3 b

59.3 a

18.8 a

73.4 b

21.3 a

NTTP

279.4 c

61.4 a

16.8 b

76.9 a

21.1 a

CTTP

288.7 c

61.0 a

17.1 b

76.9 a

21.1 a

Cultivar (C)b

HHZ

338.7 a

58.0 b

19.2 a

76.3 b

17.5 c

JNSM

291.5 b

67.3 a

18.7 a

80.8 a

16.5 d

N6Y103

342.5 a

51.4 c

17.1 b

71.7 c

25.4 a

RY1015

274.9 b

60.7 b

16.1 b

71.2 c

25.1 b

Year (Y)

2017

385.4 a

64.1 b

24.4 a

72.0 b

21.3 b

2018

322.0 b

54.2 c

17.2 b

71.4 b

20.1 c

2019

337.2 b

45.6 d

15.1 c

78.6 a

22.0 a

2020

203.0 c

73.6 a

14.5 c

78.1 a

21.1 b

Analysis of variance

Year (Y)

**

**

**

**

**

Treatment (T)

**

**

**

**

ns

Cultivar (C)

**

**

**

**

**

Y × T

*

ns

*

**

ns

Y × C

**

**

**

**

**

T × C

ns

ns

ns

ns

*

Y × T × C

*

ns

ns

ns

ns

  1. aCTDS, NTDS, NTTP and CTTP represent conventional tillage and direct seeding, no-tillage and direct seeding, no-tillage and transplanting and conventional tillage and transplanting respectively.
  2. bHHZ, JNSM, NY103 and RY015 are Huanghuazhan, Jinnongsimiao, Nei6you103 and Rongyou1015, respectively. Means within each variable sharing the same letter are not significantly different according to LSD at P = 0.05. *Significant at P < 0.05, **Significant at P < 0.01, ns, not significant at P < 0.05.
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