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Table 4 Proximate composition of rice grains when paddy was harvested at different days from 50% flowering and potassium fertilizer rates applied at the time of heading

From: Increased rate of potassium fertilizer at the time of heading enhances the quality of direct seeded rice

Grain parameters

Harvesting age in days after 50% flowering (DAFF)d

Rate of MOP applied at the time of heading (kg/ha)d

25

30

35

40

12.5

25

37.5

Crude protein (%)

5.86 ± 0.05a

6.00 ± 0.05ab

6.18 ± 0.03b

6.24 ± 0.04c

5.87 ± 0.03a

6.08 ± 0.05b

6.24 ± 0.03c

Crude fat (%)

2.23 ± 0.05a

2.42 ± 0.06b

2.60 ± 0.06c

2.61 ± 0.07c

2.43 ± 0.04a

2.44 ± 0.06a

2.52 ± 0.07a

Amylose (%)

17.84 ± 0.4c

17.40 ± 0.3b

16.10 ± 0.4a

16.00 ± 0.3a

17.13 ± 0.4b

17.6 ± 0.4b

15.71 ± 0.2a

  1. MOP muriate of potash (potassium fertilizer; 60% K2O)
  2. Mean (± SE) followed by the same superscript within a raw is not significantly different (P > 0.05) as measured by the DNMRT
  3. dData present as mean ± SE