Adsorption characteristics of droplets applied on non-smooth leaf surface of typical crops
Keywords:
surface of plant leaves, adsorption characteristics, contact angle, water holding capacity, surface tensionAbstract
To further understand the adsorption characteristics of different-type leaf surfaces adsorbing pesticide droplets and reveal the adsorption mechanism of pesticide droplets on non-smooth leaves, non-smooth leaves of 12 kinds of typical target plants were investigated in this study. The parameters of surface morphological characteristics were measured, which include contact angle between leaves and water droplets, water holding capacity surface tension, polar component, dispersion component and other quantitative range of indicators and variation by modern means. The relationships between the indicators and water holding capacity were investigated respectively. The experimental results show that the number of trichomes, epidermal wax, morphology and distribution characteristics have influences on adsorption characteristics of the water droplets. There is a negative correlation between free energy of obverse side and the water holding capacity (R=−0.447) while the free energy of reverse side and the water holding capacity show a positive correlation (R=0.212). Also, there is a negative correlation between polar component of obverse side and the water holding capacity (R=−0.357) while the polar component of reverse side and the water holding capacity in plant leaves show a positive correlation (R=0.149). The research can provide a scientific theory for reasonable spraying of pesticide in the agricultural production, and can be a reference for the development of pesticide adjuvants and bionic pesticides. Keywords: surface of plant leaves, adsorption characteristics, contact angle, water holding capacity, surface tension DOI: 10.3965/j.ijabe.20160901.1022 Citation: Wang S J, Wang H J, Li C, Zhong X M, Huang H, Zhou Y J. Adsorption characteristics of droplets applied on non-smooth leaf surface of typical crops. Int J Agric & Biol Eng, 2016; 9(1): 35-41.References
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[2] Zhai C Y, Zhao C J, Wang X, Li W, Li W, Zhu R X. Nozzle test system for droplet deposition characteristics of orchard air-assisted sprayer and its application. Int J Agric & Biol Eng, 2014; 7(2): 122–129.
[3] Gu Z Y. Analysis of the relationship between hydrophilic or hydrophobic property of plant and action of pesticides solution on plant leaves. Jiangsu Journal of Agricultural Sciences, 2009; 25(2): 276–281. (in Chinese with English abstract)
[4] Gu Z Y, Xu X L, Han L J. Action of drops of monosultap microemulsion with different surface tension on the rice leaf. Chinese Journal of Rice Science, 2004; 18(2): 176–180. (in Chinese with English abstract)
[5] Yu Y, Zhu H, Frantz J M, Reding M E, Chan K C, Ozkan H E. Evaporation and coverage area of pesticide droplets on hairy and waxy leaves. Biosystems Engineering, 2009; 104: 324–334.
[6] Qiu Z K, Yuan H Z, Li Y P, Ji M S, Huang X Y, Pang S. Influence of the surfactant silwet408 on wheat aphids control efficacy using low volume spraying. Plant Protection, 2006; 32(2): 34–37. (in Chinese with English abstract)
[7] Zhang X G, Dong J F. Study on the wetting property of a new trisiloxane surfactant on the pesticide solutions. Chemical Research and Application, 2008; 20(6): 663–666.
[8] Pedibhotla V K, Hall F R, Holmsen J. Deposit characteristics and toxicity of fipronil formulations for tobacco budworm (Lepidoptera: Noctuidae) control on cotton. Crop Protection, 1999; 18: 493–499.
[9] Zhang Y, Zhang G Y, Han F. The spreading and superspeading behavior of new glucosamide-based trisiloxane surfactants on hydrophobic foliage. Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2006; 276: 100–106.
[10] Chai Y X, Zhu N, Han H J. Dust removal effect of urban tree species in Harbin. Chinese Journal of Applied Ecology, 2002; 13(9): 1121–1126. (in Chinese with English abstract)
[11] Koukos D, Meletiou-Christou MS, Rhizopoulou S. Leaf surface wettability and fatty acid composition of Arbutus unedo and Arbutus andrachne grown under ambient conditions in a natural macchia. Acta Botanica Gallica, 2015; 162(3): 225–232.
[12] Wang S J, Zhang W, He H B, Wang W S, Zhang M, Hu X Y. Effection of typical plants leaves on pesticide wetting speciality and retentivity. Journal of Jilin University: Engineering and Technology Edition, 2013; 43(Sup): 564–568. (in Chinese with English abstract)
[13] Chen W, He X Y, Zhang Y, Sun Y, Wang W F, Ning Z H. Dust absorption effect of urban conifers in Northeast China. Chinese Journal of Applied Ecology, 2003; 14(12): 2113–2116. (in Chinese with English abstract)
[14] Neinhuis C, Barthlott W. Seasonal changes of leaf surface contamination in beech, oak and ginkgo in relation to leaf micromorphology and wettability. New Phytologist, 1998; 138: 91–98.
[15] Wang L, Gao S, Liu L, Ha S. Atmospheric particle-retaining capability of eleven garden plant species in Beijing. Chinese Journal of Applied Ecology, 2006; 17(4): 597–601. (in Chinese with English abstract)
[16] Chen Z X, Su X H, Liu S Z. Study of ecology effect of urban green space in Beijing. Chinese Landscape Architecture, 1998; 14(6): 53–56. (in Chinese with English abstract)
[17] Zhang X X, Gu R Z, Chen Z X, Li Y M, Han L L, Li H. Dust removal by green areas in there sidential quarters of Beijing. Journal of Beijing Forestry University, 1997; 19(4): 12–17. (in Chinese with English abstract)
[18] Wang Z L, Wang Z, Yan H P. Study on wheat straw surface free energy and its polar and nonpolar part. High Polymer Materials Science and Engineering, 2007; 23(3): 207–210.
[19] Fowkes F M. Determination of interfacial tensions, contact angles, and dispersion forces in surfaces by assuming additivity of intermolecular interactions in surfaces. The Journal of Physical Chemistry, 1962; 66: 382.
[20] Owens D K, Wendt R C. Estimation of the surface freeenergy of polymers. Journal of Applied Polymer Science, 1969; 13: 1741–1747.
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Published
2016-01-31
How to Cite
Shujie, W., Hujun, W., Chun, L., Xiangmei, Z., Hui, H., & Yajun, Z. (2016). Adsorption characteristics of droplets applied on non-smooth leaf surface of typical crops. International Journal of Agricultural and Biological Engineering, 9(1), 35–41. Retrieved from https://ijabe.migration.pkpps03.publicknowledgeproject.org/index.php/ijabe/article/view/1022
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Power and Machinery Systems
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