Table 2 Effects of tillage practice and irrigation regime on the total dry root weight and total root length of winter wheat.

From: Tillage and irrigation increase wheat root systems at deep soil layer and grain yields in lime concretion black soil

Year

Treatment

Total dry root weight (TDRW)/g·m−2

Total root length (TRL)/cm·cm−2

Jointing

Heading

Anthesis

Filling

Maturity

Jointing

Heading

Anthesis

Filling

Maturity

2015–2016

SSW0

49.55a

94.76c

118.30d

83.30c

60.90d

80.54a

129.50d

152.70c

125.69c

93.75b

SSW1

49.30a

133.77a

171.12a

123.40a

93.17a

83.52a

148.51a

192.73a

167.20a

119.17a

SSW2

48.50a

130.11ab

162.31b

119.26a

86.87b

83.34a

147.00a

170.45b

157.38b

114.69a

RTW0

41.74b

85.19d

79.67f.

65.54d

49.19e

72.82b

121.32e

118.00f.

89.83e

77.06c

RTW1

42.96b

133.85a

124.71c

92.52b

76.12c

74.95b

140.12b

141.08d

111.73d

95.20b

RTW2

42.21b

127.43b

101.77e

87.12c

71.31c

73.37b

135.16c

130.22e

106.04d

93.37b

Tillage practice

58.12***

9.97**

1089.74***

582.06***

126.20***

71.45***

66.13***

1124.18***

499.42***

190.14***

Irrigation regime

0.26

463.73***

384.41***

352.43***

190.89***

2.10

100.46***

209.70***

80.41***

82.31***

T*I

0.31

4.98*

19.03***

16.96***

1.47

0.40

1.04

15.72***

7.87**

2.02

2016–2017

SSW0

75.81b

110.50e

123.86c

73.27e

64.83d

124.35a

159.49d

204.26a

154.15c

104.28c

SSW1

78.52a

132.49a

148.36a

109.32a

126.20a

123.82a

188.03a

208.17a

187.22a

143.04a

SSW2

78.14a

125.77b

144.70b

100.76b

112.78b

124.14a

169.44bc

202.50a

172.13b

121.98b

RTW0

70.05d

100.55f.

92.49f.

55.26f.

55.80e

114.24d

153.22e

112.63d

94.36f.

73.91e

RTW1

74.80bc

119.57c

112.24d

93.17c

99.00c

120.55b

172.62b

154.95b

128.75d

102.83c

RTW2

73.35c

113.88d

105.53e

86.47d

95.33c

117.03c

165.76c

140.70c

108.46e

91.53d

Tillage practice

65.63***

344.14***

1364.07***

266.60***

147.53***

194.28***

25.99***

1776.30***

943.96***

1397.55***

Irrigation regime

14.62***

377.81***

192.62***

519.61***

483.49***

11.64***

69.80***

67.13***

97.41***

470.53***

T*I

1.00

1.95

5.58*

1.18

12.71**

16.38***

4.61*

50.72***

0.62

13.15***

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