Table 8 ANOVA results for maize grain quality under different straw return methods and potassium fertilizer treatments.

From: Effects of straw return with potassium fertilizer on the stem lodging resistance, grain quality and yield of spring maize (Zea mays L.)

Source of variation

DF

Protein content of grains

Starch content of grains

Crude fat content of grains

Water content of grains

S

1

64.68***

1.66

116.86***

35.96***

K

1

303.95***

7.83***

488.78***

121.18***

E

2

64.35***

11.56***

118.28***

25.62***

S × K

1

16.58***

0.16

9.57***

15.98***

S × E

2

1.97

0.06

2.03

0.21

K × E

2

2.07

0.06

2.28

1.14

S × K × E

2

0.48

0.00

0.34

0.36

  1. Note: S, K, and E represent straw return treatments, potassium fertilizer treatments, and ecological regions, respectively. Values in the table are F-values with corresponding degrees of freedom for each of the simple effects and two and three way interactions with *, **, *** indicating significant effects at respectively 5%, 1%, 0.1%
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