کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5744878 1618557 2017 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Weighting the impacts to stream water quality in small basins devoted to forage crops, dairy and beef cow production
ترجمه فارسی عنوان
مقیاس اثرات به جریان آب در حوضه های کوچک اختصاص داده شده به محصولات علوفه، تولید شیر و گوشت گاو
کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک علوم آبزیان
چکیده انگلیسی

Livestock for beef and milk production are important economic activities worldwide. These require intensive cultures of pastures and forages, with the consequent impacts on water quality in downstream rivers and reservoirs. Monthly temporal variation of nutrients and water quality were assessed along one year at basin scale (basin area <3500 ha). Several indicators of farming intensity (number of dairy cows and beef cows, percentage of area devoted to crops) and management practices (effluent treatment, fertilizer application) were related to the export of nutrients and sediments from the basins and with the water quality of receiving streams using partial least square regression analysis (PLS). According to PLS analysis, the most relevant variables to explain water quality degradation and high export coefficients of nutrients and sediments, were the percentage of basin area dedicated to crop activities and the density of dairy cows without effluent treatment. Beef and dairy cows had an important local impact on stream water without animal access restrictions. We also propose some hypotheses regarding the transport pathways of sediments and nutrients to streams. Our results demonstrate the urgent need to implement best management practices at the farm scale within each basin, focusing on: adequate phosphorus fertilization, implementation of a complete dairy effluent treatment system and animal restriction to fluvial channels.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Limnologica - Ecology and Management of Inland Waters - Volume 65, July 2017, Pages 76-84
نویسندگان
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