Synthesis and properties of a glyphosate isopropylamine salt slow-release agent via γ-ray irradiation

Lu LIU; Leping ZHANG; Hongke XIE; Jing WU; Xiaofen WU; Feng GUO; Caifeng ZHAO; Sai SHAO

doi:10.11889/j.1000-3436.2023-0118

Journal of Radiation Research and Radiation Processing, Volume. 42, Issue 3, 030202(2024)

Synthesis and properties of a glyphosate isopropylamine salt slow-release agent via γ-ray irradiation

Lu LIU1... Leping ZHANG1, Hongke XIE1, Jing WU2, Xiaofen WU1, Feng GUO1, Caifeng ZHAO1,* and Sai SHAO1,** |Show fewer author(s)

Author Affiliations

¹Hunan Institute of Nuclear Agricultural Science and Space Mutation Breeding, Hunan Academy of Agricultural Sciences, Changsha 410125, China

²Changsha Academy of Agricultural Sciences, Changsha 410016, China

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Figures & Tables(11)

Fig. 1. SEM images of CM (a) and CM/GP (b)

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Fig. 2. FTIR spectra of GP, CM/GP and CM

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$Surface tension picture of CM solution different mass fraction$

Fig. 3. Surface tension picture of CM solution different mass fraction

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Fig. 4. Release curves of GP: Cumulative release concentration (a) and Cumulative release percentage (b) (color online)

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Fig. 5. GP release kinetics fitted curves of Water/GP, AC/GP, and CM/GP

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Fig. 6. Herbicide activity for barnyard grass after 7 d treatment: blank group (a), control group (b), and experimental group (c) (the concentration of GP is 1.500 g/L)

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Table 1. Synthesis formula
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Table 1. Synthesis formula
样品Sample 淀粉Starch NaOH H₂O AA HPA DMMA NMA SHPP
CM 2.000 8.800 45.200 22.000 3.500 3.600 0.400 0.700

Table 2. Surface tension measurement ratio
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Table 2. Surface tension measurement ratio
编号Number H₂O CM 1.25% ADH
1 100.000 0.000 0.000
2 98.920 1.000 0.080
3 97.840 2.000 0.160
4 96.760 3.000 0.240
5 95.680 4.000 0.320
6 94.600 5.000 0.400
7 93.520 6.000 0.480

Table 3. Slow release performance measurement formula
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Table 3. Slow release performance measurement formula
样品
Samples
GP CM/GP AC H₂O
总质量
Total weight
Water/GP 1.000 0.000 0.000 9.000 10.000
AC/GP 1.000 0.000 1.000 8.000 10.000
CM/GP 0.000 2.000 0.000 8.000 10.000

Table 4. GP release curve fitting correlation coefficient R² of Water/GP, AC/GP, and CM/GP

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Table 4. GP release curve fitting correlation coefficient R² of Water/GP, AC/GP, and CM/GP

拟合模型 Fitting model	拟合方程 Fitting formula	样品Samples
拟合模型 Fitting model	拟合方程 Fitting formula	Water/GP	AC/GP	CM/GP
Zero-order	M_t/ M_∞=kt	0.641 8	0.932 0	0.980 7
First-order	M_t/M_∞=1-e^-^kt	0.956 6	0.994 2	0.997 2
Higuchi	M_t/M_∞=kt^1/2	0.591 6	0.982 1	0.985 4
Korsmeyer Peppas	M_t/M_∞=ktⁿ	0.701 1	0.973 2	0.992 1

Table 5. Control efficacy of CM/GP and Water/GP

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Table 5. Control efficacy of CM/GP and Water/GP

处理

Treatments

农药有效浓度 / (g∙L^-1)

Effective concentration of pesticide

株防效 / %

Control effectiveness of weed plant number

杂草鲜重 / mg

Weeds fresh

鲜重防效 / %

Fresh weight efficacy

空白组

Blank group

351.76 ± 28.74^a

对照组

Control group

0.375

0.750

1.500

41.17 ± 4.82^d

60.00 ± 2.72^c

94.67 ± 3.61^a

169.46 ± 25.97^b

99.33 ± 22.56^c

63.10 ± 8.88^d

51.86 ± 7.38^d

71.78 ± 6.41^c

82.07 ± 2.52^b

实验组

Experimental group

0.375

0.750

1.500

46.33 ± 4.82^d

85.83 ± 5.69^b

99.67 ± 0.67^a

121.74 ± 16.70^c

64.40 ± 7.64^d

30.12 ± 2.95^e

65.41 ± 4.75^c

81.71 ± 2.17^b

91.44 ± 0.84^a

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Lu LIU, Leping ZHANG, Hongke XIE, Jing WU, Xiaofen WU, Feng GUO, Caifeng ZHAO, Sai SHAO. Synthesis and properties of a glyphosate isopropylamine salt slow-release agent via γ-ray irradiation[J]. Journal of Radiation Research and Radiation Processing, 2024, 42(3): 030202

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