Table 2 Characteristics of shoot C:N, C:P and N:P under N and P fertilization.

From: Shoot-soil ecological stoichiometry of alfalfa under nitrogen and phosphorus fertilization in the Loess Plateau

Index

Treatment

Sample time

2014-1st

2015-1st

2015-2nd

2016-1st

C:N

CK

13.65 ± 1.16b

16.75 ± 3.48

16.02 ± 0.29b

15.86 ± 2.05

P

15.56 ± 0.60a

19.13 ± 0.70

18.30 ± 1.99a

17.65 ± 4.04

N

14.23 ± 0.28ab

15.10 ± 0.53

17.61 ± 0.95ab

19.19 ± 2.72

NP

14.96 ± 0.66ab

17.18 ± 2.43

17.06 ± 0.46ab

16.03 ± 2.09

C:P

CK

466.54 ± 50.38b

510.27 ± 21.04a

476.55 ± 14.65

406.75 ± 54.82

P

807.12 ± 63.28a

510.04 ± 19.65a

463.67 ± 33.97

411.12 ± 88.41

N

435.81 ± 18.77b

450.96 ± 33.58ab

553.79 ± 7.35

344.67 ± 27.33

NP

355.54 ± 14.79c

385.72 ± 58.60b

581.83 ± 116.4

347.55 ± 42.58

N:P

CK

34.14 ± 0.82b

31.23 ± 5.65a

29.75 ± 0.88ab

25.66 ± 1.44a

P

51.88 ± 3.56a

26.67 ± 0.95ab

25.40 ± 0.96b

23.49 ± 3.13ab

N

30.64 ± 1.43b

29.83 ± 1.18a

31.52 ± 2.14ab

18.09 ± 1.55c

NP

23.79 ± 1.00c

22.45 ± 1.10b

33.99 ± 6.03a

21.70 ± 0.36b

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