Table 8 Effects of foliar α-oxoglutarate and nitrogen on leaf relative chlorophyll content under drought stress (SPAD).

From: Foliar application of alpha-ketoglutarate plus nitrogen improves drought resistance in soybean (Glycine max L. Merr.)

Treatment

S1 stage

S2 stage

S3 stage

Hefeng51

Hefeng43

Hefeng51

Hefeng43

Hefeng51

Hefeng43

DS1

46.25c

43.06c

44.25c

40.85c

42.57b

37.35b

DS2

46.49c

43.19c

44.49c

40.97c

42.69b

37.62b

DS3

48.36b

45.08b

46.46b

41.28b

43.26b

37.78b

CK1

43.05d

37.17d

41.55d

36.37d

38.21c

33.01c

CK2

52.26a

48.57a

52.69a

49.07a

53.19a

49.43a

Analysis of variance (ANOVA)

Treatment (T)

*

**

*

**

**

***

Cultivar (C)

**

**

***

C × T

*

**

**

  1. Means with same letter within columns are not significantly different (P < 0.05) using LSD test.
  2. ***, **, *Significance at 0.001, 0.01, and 0.05, respectively.