Application of Polyglutamic Acid & Humic Acid Fertilizer on Rape

Applying polyglutamic acid & humic acid water-soluble fertilizer can significantly promote plant growth and development, and can significantly improve the resistance to sclerotinia and viral diseases of rapeseed.

The incidence of sclerotinia and viral diseases was reduced by 51.3% and 81.3%, which could significantly increase the fresh weight and dry weight of rapeseed in different growth stages, significantly increase the yield and benefit of rapeseed, and increase the yield and yield increase rate by 27.2% and 27.6%.

Compared with traditional humic acid fertilizer, it is more significant in improving the resistance to sclerotinia and virus diseases of rapeseed and the fresh weight and dry weight of silique peels & seeds in different growth stages.

Both humic acid and γ-PGA have the advantage of chelating, complexing or interacting with other compounds.

After using γ-PGA to complex trace elements, then compounded with mineral source humic acid to become a more comprehensive formulation.

Polyglutamic acid & humic acid fertilizer combines the effects of humic acid, polyglutamic acid and trace elements, achieving the effect of 1+1+1 > 3.

Polyglutamic Acid & Humic Acid on rapeseed

Field Trial of Polyglutamic Acid & Humic Acid

Test Products:

Group 1: Potassium Sulfate Compound Fertilizer (15-15-15); Conventional Trace Elements (B+Zn+Cu+Mo ≥ 60 g/L);

Group 2: Polyglutamic acid & Humic Acid Fertilizer (HA ≥ 30 g/L, FA ≥ 22 g/L, γ-PGA ≥ 3 g/L, B+Zn+Cu+Mo ≥ 60 g/L);

Group 3: Humic Acid Fertilizer (HA ≥ 30 g/L, FA ≥ 22 g/L, B+Zn+Cu+Mo ≥ 60 g/L)

Tab.1 Chemical Properties of the Tested Soil

pH

Organic Matters (mg/kg)

Alkali-Hydrolyzable Nitrogen (mg/kg)

Available Phosphorus (mg/kg)

Available Potassium (mg/kg)

CEC (mmol/kg)

Salinity

7.68

19.81

51.24

14.52

110.47

12.64

0.96

Tab.2 Effects of different treatments on the sclerotinia sclerotirum and virus diseases of rape

Treat

Sclerotinia sclerotirum

Virus Diseases

Number of diseased plants (Average)

Incidence Rate (%)

Reduce (%)

Number of diseased plants (Average)

Incidence Rate (%)

Reduce (%)

Group 1

47

3.9

19.3

1.6

Group 2

22.7

1.9

51.3

4.0

0.3

81.3

Group 3

33.7

2.8

28.2

8.7

0.7

56.3

Tab.3 Effects of different treatments on the fresh and dry weight of rape seed

Treat

April 20th

April 27th

May 4th

Fresh Weight (g)

Dry Weight (g)

Fresh Weight (g)

Dry Weight (g)

Fresh Weight (g)

Dry Weight (g)

Group 1

1.58

0.26

2.19

0.66

2.72

1.19

Group 2

1.85

0.36

2.98

1.37

3.66

1.57

Group 3

1.72

0.3

2.56

1.03

3.46

1.48

Tab.4 Effects of different treatments on the quality of rapeseed %

Treat

Oil Content

Crude Protein

Soluble Sugar Content 

Group 1

37.6

31.8

5.5

Group 2

39.4

32.7

5.4

Group 3

38.8

32.4

5.5

Conclusion

Compared with the control group, the polyglutamic acid & humic acid fertilizer can significantly promote the development of rapeseed plants, making the stems thicker, more branches, more effective siliques, more siliques, more thousand-grain weight, the leaves thicker and darker green.

It can significantly improve the disease resistance of rape sclerotinia and viral diseases, reduce the incidence of sclerotinia by 51.3% and 28.2%, and reduce the incidence of viral diseases by 81.3% and 56.3%.

It can significantly increase the fresh weight and dry weight of rape silique peel and grain, and can significantly increase the yield and income of rapeseed. The yield increase rate increased by 27.2%, 22.1%, and the income increased by 27.6% and 22.3%.

But it has no significant effect on soluble sugar, oil content and crude protein in rapeseed.

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