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Utilization of Protein Hydrolysates from Animal Waste for the Production of Biostimulants in Wheat Cultivation (Triticum aestivum L.)

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04 giu 2025
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Fig. 1.

Growth stages of winter wheat seedlings [own work]
Growth stages of winter wheat seedlings [own work]

Fig. 2.

Length of winter wheat shoots and roots in response to foliar application of the protein preparation (vertical bars indicate the mean ± SE; n = 3)
Length of winter wheat shoots and roots in response to foliar application of the protein preparation (vertical bars indicate the mean ± SE; n = 3)

Fig. 3.

Fresh weight of the shoots and roots of the winter wheat in response to foliar applications of a protein preparation (vertical bars indicate the mean ± SE; n = 3)
Fresh weight of the shoots and roots of the winter wheat in response to foliar applications of a protein preparation (vertical bars indicate the mean ± SE; n = 3)

Composition and main characteristics of the biostimulants studied

Parameter Unit Biostimulant preparation
1 4a 8
Protein hydrolysate (PH) - collagen collagen collagen, keratin
Concentrate of pH % 0.5 0.5 0.5
Active substance (AS) - sodium salicylate titanium ascorbate sodium salicylate
Concentrate of AS % 0.03 0.01 0.03
Total N % 1.30 1.00 1.10
pH - 7.13 7.61 7.04
Density g cm−1 1.004±0.002 1.001±0.003 1.004±0.004
Colour - colourless light yellow/yellow light yellow

Effect of foliar treatments on the composition in the soil_

Parameter Unit Code of Sample
Control 1 4a 8
Salinity g KCl/kg 2.46a 2.23a 1.91b 1.92b
P mg/100 g soil 11.5a 11.8a 13.3a 12a
K mg/100 g soil 24.7a 22.5a 23.1a 21.3b
Mg mg/100 g soil 19.4a 18.3a 18.7a 19.4a
B mg/kg 2.52a 2.45a 5.93b 5.69b
Cu mg/kg 1.95a 2.34b 3.92c 2.57b
Fe mg/kg 272a 276a 343b 350b
Mn mg/kg 4.42a 4.41a 5.92b 4.22a
Zn mg/kg 3.47a 3.7a 5.04c 4.08b
Na mg/kg 63.1a 31.4c 70b 65.5a
Nog % 1.09a 1.08a 1.05a 1.15a
Cog % 47.3a 47.4a 44.2a 50.4a
s.org % 81.4a 81.5a 76.1a 86.6a
s.m. % 81.9a 82a 81.4a 87.1a

Amino acid content in wheat seedlings [g/kg]

Amino acid Control MU 1 MU 4a MU 8 MU
Asp 4.98 0.59 5.63 0.67 4.95 0.59 5.15 0.61
Thr 1.69 0.22 1.74 0.22 1.74 0.22 1.83 0.23
Ser 1.55 0.21 1.59 0.22 1.54 0.21 1.62 0.22
Glu 3.61 0.48 3.72 0.49 3.53 0.47 3.84 0.51
Pro 1.93 0.28 1.84 0.27 1.78 0.26 2.09 0.31
Gly 1.91 0.22 1.15 0.13 1.94 0.22 2.00 0.23
Ala 2.37 0.28 2.48 0.30 2.39 0.28 2.51 0.30
Val 2.12 0.24 2.27 0.26 2.18 0.25 2.26 0.26
Ile 1.54 0.19 1.63 0.20 1.56 0.19 1.62 0.20
Leu 2.86 0.33 3.01 0.34 2.85 0.32 3.01 0.34
Tyr 0.87 0.13 0.86 0.13 0.83 0.13 0.99 0.15
Phe 2.91 0.38 3.01 0.39 2.84 0.37 2.96 0.38
His 0.92 0.12 0.97 0.13 0.87 0.11 0.91 0.12
Lys 3.15 0.38 3.32 0.40 3.12 0.38 3.24 0.40
Arg 2.13 0.31 2.45 0.36 2.21 0.32 2.23 0.32
Cys 0.44 0.05 0.41 0.05 0.41 0.05 0.48 0.06
Met 0.66 0.08 0.66 0.08 0.63 0.07 0.73 0.09

Effect of foliar treatments on the mineral content in leaves of winter wheat_

Parameter Unit Code of Sample
Control 1 4a 8
N % 6.85±0.75a 6.76±0.74a 6.81±0.75a 6.82±0.75a
P % 1.27±0.33a 1.20±0.31a 1.18±0.31a 1.18±0.31a
K % 7.46±1.69a 7.19±1.63a 7.43±1.69a 7.25±1.65a
Mg % 0.28±0.08a 0.28±0.08a 0.28±0.08a 0.29±0.08a
Ca % 0.68±0.16a 0.68±0.16a 0.65±0.15a 0.68±0.16a
DM % 95.0±13.1a 95.8±13.2a 94.9±13.1a 94.8±13.1a
B mg/kg 5.83±1.94a 4.51±1.50a 4.64±1.5a 5.86±1.95a
Cu mg/kg 5.25±1.22a 4.19±0.97a 4.17±0.97a 4.55±1.06a
Fe mg/kg 83.1±26.2a 75.9±23.9b 75.1±23.7b 112.0±35.3c
Mn mg/kg 113.0±21.1a 123±23a 129.0±24.1b 128.0±23.9b
Zn mg/kg 48.9±17.5a 48.9±17.5a 42.0±15.0b 52.4±18.7a
Na mg/kg 105.0±32.3a 90.7±27.9b 92.1±28.4b 110.0±33.9a