Introduction
Material and Methods
Site Description and Plant Material
Physical properties | |||||||
Sand | Clay | Silt | Texture | Field capacity % | Wilting point % | ||
14.8 | 47.2 | 38 | Clay | 44.57 | 18.25 | ||
Chemical analysis | |||||||
E.C.M/m | pH | Meq/L | |||||
Ca | Mg | Na | K | Hco2 | Cl | ||
1.7 | 8.2 | 3.66 | 0.527 | 0.982 | 0.31 | 2.10 | 1.00 |
Synthesis of Water-soluble Carbon Nanoparticles
Experimental Treatments
Experimental Design
Experimental Site Preparation and Cultivation
Measurements of Crop Parameters
Vegetative Growth
Leaf Pigment Contents
Bulb Characteristics
Yield and Yield Components
Bulb Chemical Quality Parameters
Statistical Analysis
Results
Plant Vegetative Growth Characteristics
Treatments | Plant length (cm) | No. leaves | Fresh weight (g) | Dry weight (g) | Neck diameter (cm) | ||
---|---|---|---|---|---|---|---|
Leaves | Bulb | Leaves | Bulb | ||||
First season | |||||||
Control | 28.55 ± 1.88 | 6.25 ± 0.88 | 40.25 ± 2.56 | 60.33 ± 3.66 | 9.01 ± 0.66 | 13.39 ± 2.10 | 1.50 ± 0.18 |
wsCNPs 300 mg/L | 34.17 ± 0.66 | 8.33 ± 0.27 | 47.08 ± 1.66 | 72.70 ± 1.80 | 11.66 ± 0.50 | 15.88 ± 1.51 | 2.20 ± 0.13 |
wsCNPs 300 mg/L + S 2.5 g/L | 36.30 ± 0.29 | 10.13 ± 0.20 | 52.22 ± 0.78 | 83.74 ± 1.15 | 13.54 ± 0.43 | 18.87 ± 0.67 | 2.50 ± 0.13 |
wsCNPs 400 mg/L + S 3.5 g/L | 39.33 ± 0.31 | 11.00 ± 0.21 | 55.39 ± 0.70 | 91.91 ± 0.88 | 14.30 ± 0.32 | 19.30 ± 0.40 | 2.65 ± 0.66 |
wsCNPs 500 mg/L + S 4.5 g/L | 41.33 ± 0.06 | 12.67 ± 0.12 | 60.14 ± 0.33 | 110.47 ± 0.70 | 14.77 ± 0.23 | 20.78 ± 0.31 | 2.75 ± 0.03 |
LSD | 1.43 | 0.60 | 3.27 | 1.94 | 0.67 | 0.77 | 0.14 |
Second season | |||||||
Control | 29.67 ± 2.21 | 7.33 ± 0.95 | 42.53 ± 2.41 | 64.15 ± 3.67 | 9.33 ± 0.78 | 13.25 ± 2.18 | 1.33 ± 0.29 |
wsCNPs 300 mg/L | 34.67 ± 0.78 | 8.67 ± 0.19 | 47.67 ± 1.67 | 73.30 ± 2.11 | 11.11 ± 0.58 | 15.95 ± 1.32 | 2.30 ± 0.18 |
wsCNPs 300 mg/L + S 2.5 g/L | 37.33 ± 0.21 | 10.67 ± 0.21 | 50.78 ± 0.87 | 86.48 ± 1.21 | 13.12 ± 0.30 | 17.28 ± 1.11 | 2.67 ± 0.16 |
wsCNPs 400 mg/L + S 3.5 g/L | 39.67 ± 0.25 | 10.67 ± 0.18 | 62.01 ± 0.77 | 95.33 ± 0.88 | 14.10 ± 0.38 | 18.70 ± 0.55 | 270 ± 0.22 |
wsCNPs 500 mg/L + S 4.5 g/L | 42.67 ± 0.15 | 12.37 ± 0.06 | 65.09 ± 0.26 | 108.22 ± 0.62 | 14.66 ± 0.30 | 19.79 ± 0.33 | 2.88 ± 0.06 |
LSD | 1.05 | 0.84 | 1.12 | 2.88 | 1.13 | 0.69 | 0.11 |
Yield and Physical Properties of Bulb
Treatments | Total yield ton/fed | Bulb (cm) | Average weight g/bulb | |
---|---|---|---|---|
Diameter | Length | |||
First season | ||||
Control | 12.88 ± 0.77 | 4.33 ± 0.52 | 4.10 ± 0.44 | 122.25 ± 10.33 |
wsCNPs 300 mg/L | 14.88 ± 0.62 | 5.10 ± 0.52 | 5.10 ± 0.21 | 149.36 ± 7.81 |
wsCNPs 300 mg/L + S 2.5 g/L | 15.78 ± 0.48 | 5.90 ± 0.25 | 6.13 ± 0.15 | 162.41 ± 5.44 |
wsCNPs 400 mg/L + S 3.5 g/L | 16.67 ± 0.29 | 6.20 ± 0.25 | 6.42 ± 0.15 | 175.00 ± 4.58 |
wsCNPs 500 mg/L + S 4.5 g/L | 17.92 ± 0.13 | 6.50 ± 0.16 | 6.66 ± 0.09 | 180.11 ± 4.00 |
LSD | 0.31 | 0.24 | 0.20 | 3.76 |
Second season | ||||
Control | 13.00 ± 0.68 | 4.67 ± 0.59 | 4.16 ± 0.41 | 131.08 ± 10.11 |
wsCNPs 300 mg/L | 15.10 ± 0.54 | 5.19 ± 0.54 | 5.00 ± 0.30 | 144.20 ± 6.47 |
wsCNPs 300 mg/L + S 2.5 g/L | 16.20 ± 0.47 | 6.00 ± 0.32 | 6.15 ± 0.22 | 170.11 ± 4.45 |
wsCNPs 400 mg/L + S 3.5 g/L | 16.87 ± 0.30 | 6.17 ± 0.24 | 6.17 ± 0.13 | 175.20 ± 4.08 |
wsCNPs 500 mg/L + S 4.5 g/L | 18.02 ± 0.15 | 6.33 ± 0.21 | 6.50 ± 0.10 | 181.20 ± 3.15 |
LSD | 0.23 | 0.24 | 0.23 | 4.11 |
Leaf Pigment Contents
Treatments | Chl a mg/g F.W. | Chl b mg/g F.W. | Chl a + b mg/g F.W. | Carotenoids mg/g F.W. |
---|---|---|---|---|
First season | ||||
Control | 1.28 ± 0.028 | 0.30 ± 0.018 | 1.58 ± 0.025 | 1.22 ± 0.016 |
wsCNPs 300 mg/L | 1.67 ± 0.010 | 0.39 ± 0.014 | 2.06 ± 0.017 | 1.31 ± 0.022 |
wsCNPs 300 mg/L + S 2.5 g/L | 1.75 ± 0.010 | 0.51 ± 0.010 | 2.26 ± 0.017 | 1.35 ± 0.012 |
wsCNPs 400 mg/L + S 3.5 g/L | 1.85 ± 0.008 | 0.53 ± 0.012 | 2.38 ± 0.006 | 1.38 ± 0.010 |
wsCNPs 500 mg/L + S 4.5 g/L | 1.89 ± 0.004 | 0.54 ± 0.009 | 2.43 ± 0.006 | 1.42 ± 0.007 |
LSD | 0.020 | 0.023 | 0.11 | 0.020 |
Second season | ||||
Control | 1.30 ± 0.026 | 0.32 ± 0.027 | 1.62 ± 0.020 | 1.23 ± 0.017 |
wsCNPs 300 mg/L | 1.66 ± 0.024 | 0.40 ± 0.024 | 2.06 ± 0.022 | 1.31 ± 0.018 |
wsCNPs 300 mg/L + S 2.5 g/L | 1.73 ± 0.018 | 0.46 ± 0.025 | 2.19 ± 0.017 | 1.42 ± 0.018 |
wsCNPs 400 mg/L + S 3.5 g/L | 1.81 ± 0.016 | 0.53 ± 0.014 | 2.34 ± 0.014 | 1.42 ± 0.010 |
wsCNPs 500 mg/L + S 4.5 g/L | 1.87 ± 0.007 | 0.57 ± 0.0101 | 2.44 ± 0.014 | 1.47 ± 0.009 |
LSD | 0.085 | 0.046 | 0.14 | 0.019 |
Nutritional Values of Bulbs and Their Mineral Contents
Treatments | TSS% | Ascorbic acid (mg/100 g F.W.) | Total phenols mg/g 100 DW | Total flavonoids |
---|---|---|---|---|
First season | ||||
Control | 8.57 ± 0.66 | 2.03 ± 0.33 | 124.56 ± 7.14 | 25.11 ± 3.10 |
wsCNPs 300 mg/L | 9.87 ± 0.42 | 3.34 ± 0.30 | 146.21 ± 7.00 | 32.31 ± 2.42 |
wsCNPs 300 mg/L + S 2.5 g/L | 10.55 ± 0.52 | 4.71 ± 0.22 | 188.36 ± 4.66 | 38.66 ± 2.11 |
wsCNPs 400 mg/L + S 3.5 g/L | 11.00 ± 0.44 | 4.97 ± 0.24 | 193.24 ± 3.11 | 43.44 ± 1.00 |
wsCNPs 500 mg/L + S 4.5 g/L | 11.67 ± 0.30 | 5.88 ± 0.12 | 201.37 ± 2.77 | 45.77 ± 1.00 |
LSD | 0.34 | 0.21 | 7.11 | 0.91 |
Second season | ||||
Control | 8.34 ± 0.67 | 2.33 ± 0.30 | 127.51 ± 7.22 | 27.31 ± 3.18 |
wsCNPs 300 mg/L | 9.33 ± 0.40 | 3.77 ± 0.30 | 141.44 ± 7.06 | 31.77 ± 2.14 |
wsCNPs 300 mg/L + S 2.5 g/L | 10.87 ± 0.22 | 4.87 ± 0.21 | 177.77 ± 4.35 | 40.66 ± 2.00 |
wsCNPs 400 mg/L + S 3.5 g/L | 11.10 ± 0.31 | 5.15 ± 0.10 | 190.84 ± 2.58 | 42.78 ± 1.10 |
wsCNPs 500 mg/L + S 4.5 g/L | 11.67 ± 0.11 | 5.89 ± 0.10 | 202.36 ± 2.11 | 47.25 ± 0.92 |
LSD | 0.24 | 0.43 | 9.13 | 1.66 |
Treatments | % | ||||
---|---|---|---|---|---|
N | P | K | Ca | S | |
First season | |||||
Control | 1.33 ± 0.19 | 0.29 ± 0.09 | 1.30 ± 0.16 | 1.40 ± 1.00 | 0.20 ± 0.16 |
wsCNPs 300 mg/L | 1.54 ± 0.13 | 0.32 ± 0.06 | 1.40 ± 0.10 | 1.50 ± 0.17 | 0.28 ± 0.16 |
wsCNPs 300 mg/L + S 2.5 g/L | 1.60 ± 0.13 | 0.32 ± 0.06 | 1.55 ± 0.10 | 1.83 ± 0.04 | 0.41 ± 0.16 |
wsCNPs 400 mg/L + S 3.5 g/L | 1.72 ± 0.07 | 0.35 ± 0.06 | 1.66 ± 0.10 | 1.87 ± 0.09 | 0.44 ± 0.10 |
wsCNPs 500 mg/L + S 4.5 g/L | 1.78 ± 0.07 | 0.37 ± 0.03 | 1.71 ± 0.06 | 1.90 ± 0.01 | 0.46 ± 0.06 |
LSD | 0.05 | 0.02 | 0.05 | 0.10 | 0.02 |
Second season | |||||
Control | 1.38 ± 0.18 | 0.29 ± 0.09 | 1.33 ± 0.16 | 1.33 ± 1.10 | 0.21 ± 0.10 |
wsCNPs 300 mg/L | 1.52 ± 0.13 | 0.31 ± 0.08 | 1.42 ± 0.09 | 1.50 ± 0.17 | 0.27 ± 0.06 |
wsCNPs 300 mg/L + S 2.5 g/L | 1.64 ± 0.10 | 0.35 ± 0.06 | 1.50 ± 0.06 | 1.87 ± 0.06 | 0.45 ± 0.10 |
wsCNPs 400 mg/L + S 3.5 g/L | 1.73 ± 0.02 | 0.35 ± 0.04 | 1.60 ± 0.06 | 1.90 ± 0.06 | 0.42 ± 0.10 |
wsCNPs 500 mg/L + S 4.5 g/L | 1.80 ± 0.02 | 0.37 ± 0.04 | 1.66 ± 0.06 | 1.90 ± 0.04 | 0.48 ± 0.06 |
LSD | N.S. | 0.01 | 0.04 | 0.05 | 0.04 |