Table 3 Effect of POLY4 on pyruvic acid and total protein concentrations of onion and garlic.

From: Polyhalite as an alternate nutrient source for improving growth, yield, and nutrient use efficiency in onion and garlic

Treatments

Pyruvic acid (µmoles g fresh weight–1)

Total protein (%)

Onion

Garlic

Onion

Garlic

2022–2023

2023–2024

2022–2023

2023–2024

2022–2023

2023–2024

2022–2023

2023–2024

100% K alone (No S)

5.94 abc

4.99 f

38.40 c

32.35 e

3.68 b

3.93 g

16.87 bcd

17.25 de

100% S alone (No K)

5.58 bc

5.20 e

43.20 bc

32.45 e

3.77 b

3.94 g

17.82 b

17.65 bcd

100% K (MOP) and S (BS)

6.64 a

5.22 e

49.60 ab

45.95 a

3.59 b

4.44 d

18.98 a

18.15 bc

75% S (POLY4)

5.41 c

5.44 cd

48.00 ab

36.65 cd

4.77 a

4.32 e

16.01 d

16.30 f

100% S (POLY4)

5.89 abc

4.60 g

49.60 ab

33.55 de

4.40 ab

4.11 f

16.32 cd

16.53 ef

150% S (POLY4)

6.27 ab

5.35 de

54.40 a

47.05 a

4.12 ab

4.86 b

17.16 bc

19.88 a

75% S (POLY4) + K (MOP)

6.24 ab

5.56 c

46.40 abc

31.80 e

4.28 ab

4.40 de

16.67 cd

14.15 g

100% S (POLY4) + K (MOP)

6.00 abc

5.80 b

49.60 ab

38.65 bc

3.81 b

5.61 a

16.33 cd

17.33 cde

150% S (POLY4) + K (MOP)

5.63 bc

6.01 a

44.80 bc

40.10 b

3.87 b

4.65 c

14.89 e

18.28 b

P value

< 0.0001

< 0.0001

< 0.0001

< 0.0001

0.002

< 0.0001

< 0.0001

< 0.0001

CV (%)

5.28

1.21

7.93

3.47

9.07

1.04

2.65

2.05

  1. Different lowercase letters indicate significant differences (P < 0.05) among treatments. 100% K (MOP) and S (BS): 100% recommended potassium applied through muriate of potash and sulfur through bentonite sulfur.