Table 1 Growth duration in machine-transplanted double-cropped rice grown under different sowing periods in 2015 and 2016.

From: Elastic sowing dates with low seeding rate for grain yield maintenance in mechanized large-scale double-cropped rice production

Season

Cultivar

Sowing date delay (days)

FH (date)

MA (date)

Days from TP to FH

Days from FH to MA

Growth duration (days)

2015 ER

ZZ39

 + 0

6–10

7–10

54

30

105

  

+5

6–14

7–14

52

30

104

  

+10

6–19

7–20

53

31

104

  

+15

6–23

7–22

52

29

102

2016 ER

ZZ39

 + 0

6–16

7–12

63

26

109

  

+5

6–18

7–16

61

27

108

  

+10

6–20

7–20

59

28

107

  

+15

6–23

7–23

55

30

105

 

LLY268

 + 0

6–21

7–16

68

25

113

  

+5

6–23

7–20

65

27

112

  

+10

6–26

7–25

64

28

112

  

+15

6–29

7–28

61

29

110

 

Average

+0

  

62 ± 7a

27 ± 3a

109 ± 4a

  

+5

  

59 ± 7a

28 ± 2a

108 ± 4a

  

+10

  

59 ± 6a

29 ± 2a

108 ± 4a

  

+15

  

56 ± 5a

29 ± 1a

106 ± 4a

  

LSD0.05

  

11

3

8

2015 LR

HY518

 + 0

9–10

10–13

53

33

110

  

+5

9–12

10–22

55

40

114

  

+10

9–17

10–26

54

39

113

  

+15

9–20

11–02

52

43

115

  

+20

10–2

11–13

59

42

121

2016 LR

HY518

 + 0

9–09

10–18

55

40

109

  

+5

9–14

10–23

56

39

109

  

+10

9–18

10–28

55

40

109

  

+15

9–22

11–03

54

42

110

  

+20

9–28

11–10

56

42

112

 

TY390

 + 0

9–14

10–25

60

42

116

  

+5

9–18

11–02

60

45

119

  

+10

9–22

11–09

59

48

121

  

+15

9–28

11–16

61

48

123

  

+20

10–4

11–22

62

50

126

 

Average

+0

  

56 ± 4a

38 ± 5a

112 ± 4a

  

+5

  

57 ± 3a

41 ± 3a

114 ± 5a

  

+10

  

56 ± 3a

42 ± 5a

114 ± 6a

  

+15

  

56 ± 5a

44 ± 3a

116 ± 7a

  

+20

  

59 ± 3a

45 ± 5a

120 ± 7a

  

LSD0.05

  

6

8

11

  1. TP, transplanting stage; FH, full heading stage; MA, mature stage. LSD, least significant difference at a significance level of P < 0.05.