کد مقاله کد نشریه سال انتشار مقاله انگلیسی ترجمه فارسی نسخه تمام متن
4572814 1332395 2017 8 صفحه PDF ندارد دانلود رایگان
عنوان انگلیسی مقاله
Soil water infiltration affected by topsoil thickness in row crop and switchgrass production systems
ترجمه فارسی عنوان
نفوذ آب خاک تحت تاثیر ضخامت خاک در سیستم های تولید محصولات کشاورزی ردیف و جایگزین (switchgrass)
کلمات کلیدی
ارزیابی بهره وری خاک برای انرژی های تجدید پذیر و حفاظت. اشباع هدایت هیدرولیکی؛
SPARC, Soil Productivity Assessment for Renewable Energy and Conservation; Ks, saturated hydraulic conductivity; S, sorptivity; qs, quasi-steady infiltration rate; Kfs, field-saturated hydraulic conductivity; I, cumulative infiltration; Id, estimated cumu
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات فرآیندهای سطح زمین
چکیده انگلیسی


• Switchgrass is recommended for degraded claypan soils for improved water use.
• Predicting runoff and infiltration is crucial for optimal agricultural management.
• Switchgrass enhanced infiltration and reduced runoff for degraded claypan soils.

Conversion of annual grain crop systems to biofuel production systems can restore soil hydrologic function; however, information on these effects is limited. Hence, the objective of this study was to evaluate the influence of topsoil thickness on water infiltration in claypan soils for grain and switchgrass (Panicum virgatum L.) production systems. The experiment was performed at the University of Missouri South Farm (38°54′N, 92°16′W) on a Mexico silt loam (Vertic Luvisols) soil. Since 2009, plots were planted with either switchgrass or a corn (Zea mays L.)-soybean (Glycine max (L.) Merr.) rotation. Infiltration rates were measured using ponded infiltrometers during two years (2014 and 2015) under switchgrass and grain crop management each with two levels of topsoil thickness (0 and 37.5 cm). Physically-based Parlange and Green-Ampt infiltration models were used to estimate saturated hydraulic conductivity (Ks) and sorptivity (S) parameters. Switchgrass planted on degraded soil (shallow topsoil treatment) resulted in greater Ks, S, qs (quasi-steady infiltration rate) and Kfs (field-saturated hydraulic conductivity) values than with row crop management for both 2014 and 2015 measurement years. Results for selected 24-hour mean frequency (11.8, 14.2, and 16.2 cm) storms showed that switchgrass production systems enhanced estimated water infiltration, reduced estimated runoff, and decreased estimated time from water ponding to end of ponding compared with row crop management. Switchgrass is recommended to be planted on degraded soils especially in claypan landscapes for improved water use.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Geoderma - Volume 286, 15 January 2017, Pages 46–53
نویسندگان
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