Potential effect of wetting agents added to agricultural sprays on the stability of soil aggregates
Author:
Kintl Antonín, Vlček Vítězslav, Brtnický Martin, Nedělník Jan, Elbl JakubORCID
Abstract
Abstract. A potential effect of adjuvants/wetting agents added to
the spray mixture on the water stability of soil aggregates (WSA) in
agricultural soil was studied. Nine sites were chosen in the Czech Republic.
Each site was mapped using representative soil pits (depth min. 1.3 m). A
total of 54 mixed samples were collected from topsoil horizons on the
selected sites. The samples were exposed to the action of four different
types of wetting agents (organosilicone wetting agent; methyl ester of
rapeseed oil; mixture of methyl ester palmitic and oleic acids; isodecyl
alcohol ethoxylate), which are the most common wetting agents used in
agriculture in the Czech Republic. WSA was determined before and after the
addition of wetting agents (WA). Initial WSA values were at the same level
in a majority of sampling points. Two sites were an exception, on which
Haplic Luvisols and Relictistagnic Fluvisols occurred. These soil types
featured the lowest WSA values. After the addition of WA across the sampling
points, average WSA values exhibited a demonstrable trend: WSA of control
sample (without the WA application) was at all times higher than in samples
with the addition of WA. If the measured WSA values are compared in terms of
overall means, it is evident that the control variant always exhibited the
highest WSA value (on average 44.04 %) and the variants with the
application of WA showed always WSA values lower by min. 16 %. The worst
effect on WSA was that of wetting agents whose basic component was methyl
ester of rapeseed. These wetting agents caused a decrease in WSA by more
than 50 %. All soil samples were also analysed for basic soil parameters
(glomalin, oxidizable carbon – Cox, pH, Na, P, Ca, K, Mg) in order to
determine their potential influence on aggregate stability and to possibly eliminate the
negative impact of WA. In this respect, only a significant influence of Cox
content on WSA was recorded, which positively correlated with the stability
of soil aggregates.
Funder
Technology Agency of the Czech Republic
Publisher
Copernicus GmbH
Reference72 articles.
1. Ahmed, A. A., Thiele-Bruhn, S., Aziz, G. S., Hilal, R.F .,
Elroby, S. A., Al-Youbi, A. O., Leinweber, P., and Kühn, O.: Interaction of polar and nonpolar organic pollutants
with soil organic matter: Sorption experiments and molecular dynamics
simulation, Sci. Total Environ., 508, 276–287,
https://doi.org/10.1016/j.scitotenv.2014.11.087, 2015. 2. Almajmaie, A., Hardie, M., Acuna, T., and Birch, C.: Evaluation of methods
for determining soil aggregate stability, Soil Till. Res., 167, 39–45,
https://doi.org/10.1016/j.still.2016.11.003, 2017. 3. Angers, D. A.: Changes in Soil Aggregation and Organic Carbon under Corn and
Alfalfa, Soil Sci. Soc. Am. J., 56, 1244–1249, https://doi.org/10.2136/sssaj1992.03615995005600040039x, 1992. 4. Arienzo, M., Christen, E. W., Jayawardane, N. S., and Quayle, W. C.: The
relative effects of sodium and potassium on soil hydraulic conductivity and
implications for winery wastewater management, Geoderma, 173, 303–310,
https://doi.org/10.1016/j.geoderma.2011.12.012, 2012. 5. Baratella, V. and Trinchera, A.: Organosilicone surfactants as innovative
irrigation adjuvants: Can they improve water use efficiency and nutrient
uptake in crop production?, Agric. Water Manage., 204, 149–161,
https://doi.org/10.1016/j.agwat.2018.04.003, 2018.
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