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Table 1 Impact of growing perennial warm-season grasses in monocultures and mixtures on root biomass on a Tomek silt loam in eastern Nebraska after 6 years of management

From: Root biomass and soil carbon response to growing perennial grasses for bioenergy

Treatments

Root biomass (Mg ha−1)

 

Depths (cm)

 

0–10

10–20

20–40

40–60

60–80

80–100

0–100

Grass mixture 1

11.98

1.54

2.34

1.15

1.32

0.58

18.54a*

Grass mixture 2

11.64

1.34

2.38

1.73

0.87

1.06

18.17a

Shawnee

14.41

1.84

1.61

1.13

0.65

0.81

20.27a

Kanlow N1

12.47

2.53

2.78

1.59

1.05

0.89

20.27a

Miscanthus (Mxg)

9.21

2.22

3.78

0.70

0.66

0.74

16.79ab

Chief

6.82

1.29

1.38

1.12

0.71

0.50

10.63b

LSD 0.10

6.70

1.32

2.44

0.84

0.49

0.86

1.59

  1. The means are back-transformed log values. Perennial warm-season grass monocultures [switchgrass (cv. Shawnee, Kanlow N1), indiangrass (Chief) and Mxg] and grass mixture 1 [big bluestem (Goldmine) + indiangrass (Warrior) + switchgrass (Shawnee)] and grass mixture 2 [big bluestem (Bonanza) + indiangrass (Scout) + switchgrass (Shawnee)]
  2. *Numbers followed by different letters within a column show significant differences among treatments at P ≤ 0.10