Moisture-dependent Water Repellency of Greenlandic Cultivated Soils
نویسندگان
چکیده
The rapid warming of the Arctic is changing conditions for agricultural activity in southwest Greenland markedly, which necessitates studies physical properties soil resource. Soil water repellency (SWR) a property that changes functional behaviour across soil-specific range water-content (W). Although SWR occurs worldwide, it has not been studied sub-arctic pasture and grass fields. Thus, aim was to examine prevalence South establish pedotransfer functions on are faster measure than SWR, i.e. organic fractions, texture retention. This study included 145 samples from 22 fields distributed three areas Greenland, with broad distributions (clay: 0.017–0.194 kg kg−1) carbon (OC) (0.009–0.241 contents. degree as function content (SWR-W curve) measured oven-dry at became hydrophilic (WNON), total (SWRAREA) calculated integrated trapezoidal area SWR-W curve. A 99% 98% were water-repellent extremely repellent their maximum respectively. Among fractions (OC, Loss-on-ignition 550 °C, 225 °C (LOI550 LOI225)), LOI550 best predictor SWRAREA WNON (both r2 = 0.93). Multiple linear regressions including clay increased r2adj 0.92 0.95 OC LOI550, Campbell-Shiozawa (CS) model fitted soil–water retention curves (pF 3.0–6.9), inverse slope (−α−1) CS exhibited high correlation both (r2adj 0.87) 0.93), thus suggesting governs SWR. Lastly, shown coefficient proportionality between these soils coincided New Zealand.
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ژورنال
عنوان ژورنال: Geoderma
سال: 2021
ISSN: ['0016-7061', '1872-6259']
DOI: https://doi.org/10.1016/j.geoderma.2021.115189