کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5758340 | 1622891 | 2017 | 13 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Release of phosphorus from crop residue and cover crops over the non-growing season in a cool temperate region
ترجمه فارسی عنوان
انتشار فسفر از بقایای محصول و پوشش محصولات در طول فصل غیر رشد در یک منطقه سرد و معتدل
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
تلفات تغذیه ای، بهترین شیوه های مدیریت، زمستان محصولات کشاورزی، وقایع جریان قله، سطوح سطحی، زهکشی کاشی،
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
علوم زراعت و اصلاح نباتات
چکیده انگلیسی
In northern climates, crop residue and cover crops are potential sources of dissolved reactive phosphorus (DRP) to runoff; yet, there are few field studies to quantify this. The objectives of this study were (1) to quantify changes in water extractable phosphorus (WEP) concentrations in the residues of Triticum aestivum L. (winter wheat), Trifolium pretense L. (red clover) and Avena sativa L. (oat) cover crops and surface soil in two agricultural fields (ILD and LON) over the non-growing season (NGS); and (2) to determine if changes in WEP in vegetation residue or soil were reflected in loads of DRP or total P (TP) in surface runoff and/or tile drain effluent. Concentrations of WEP in cover crops were larger than those in wheat residue and soil. Water extractable P concentrations in vegetation increased with plant decomposition and decreased following runoff events indicating that the plant WEP was mobilized in runoff. Differences in WEP concentrations were not observed with topography, with the exception of the period following snowmelt when low-lying areas prone to surface inundation were depleted relative to upland locations. Although WEP appeared to have been mobilized from vegetation and soil pools, loads of DRP (0.165-0.245 kg haâ1) and TP (0.295 kg haâ1-0.360 kg haâ1) leaving the fields were small in comparison to P pools in cover crops (7.70 kg haâ1 oat, 1.70 kg haâ1 red clover), wheat residues (0.03-0.06 kg haâ1) and soils (1.39-5.87 kg haâ1), suggesting that much of the P released from vegetation was retained within the field. This study provides insight into the timing and magnitude of P release from vegetation throughout the non-growing season in regions with cool temperate climates, and provides an improved understanding of the contribution of cover crops to winter P losses.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Agricultural Water Management - Volume 189, 31 July 2017, Pages 39-51
Journal: Agricultural Water Management - Volume 189, 31 July 2017, Pages 39-51
نویسندگان
T.M. Lozier, M.L. Macrae, R. Brunke, L.L. Van Eerd,